master update from loc-sens-attn-smaller-post-cbhg

.compute

@@ -1,3 +1,10 @@
 #!/bin/bash
 source ../tmp/venv/bin/activate
-python train.py --config_path config.json 
+# ls /snakepit/jobs/1023/keep/
+# source /snakepit/jobs/1023/keep/venv/bin/activate
+# source  /snakepit/jobs/1047/keep/venv/bin/activate
+# python extract_feats.py --data_path /snakepit/shared/data/keithito/LJSpeech-1.1/wavs --out_path /snakepit/shared/data/keithito/LJSpeech-1.1/loader_data/  --config config.json --num_proc 32
+# python train.py --config_path config_kusal.json --debug true
+python train.py --config_path config.json --debug true
+# python -m cProfile -o profile.cprof train.py --config_path config.json --debug true
+# nvidia-smi

README.md

@@ -23,6 +23,7 @@ Checkout [here](https://mycroft.ai/blog/available-voices/#the-human-voice-is-the
 | [iter-62410](https://drive.google.com/open?id=1pjJNzENL3ZNps9n7k_ktGbpEl6YPIkcZ)| [99d56f7](https://github.com/mozilla/TTS/tree/99d56f7e93ccd7567beb0af8fcbd4d24c48e59e9)           | [link](https://soundcloud.com/user-565970875/99d56f7-iter62410 )|First model with plain Tacotron implementation.|
 | [iter-170K](https://drive.google.com/open?id=16L6JbPXj6MSlNUxEStNn28GiSzi4fu1j) | [e00bc66](https://github.com/mozilla/TTS/tree/e00bc66) |[link](https://soundcloud.com/user-565970875/april-13-2018-07-06pm-e00bc66-iter170k)|More stable and longer trained model.|
 | Best: [iter-270K](https://drive.google.com/drive/folders/1Q6BKeEkZyxSGsocK2p_mqgzLwlNvbHFJ?usp=sharing)|[256ed63](https://github.com/mozilla/TTS/tree/256ed63)|[link](https://soundcloud.com/user-565970875/sets/samples-1650226)|Stop-Token prediction is added, to detect end of speech.|
+| Best: [iter-K] | [bla]() | [link]() | Location Sensitive attention |
 
 ## Data
 Currently TTS provides data loaders for

ThisBranch.txt

@@ -0,0 +1,10 @@
+- location sensitive attention
+- attention masking
+x updated audio pre-processing (removed preemphasis and updated normalization)
+- testing with example senteces
+- optional eval-iteration
+- plot alignments and specs for test sentences
+- use lws as an alternative audio processor
+- make configurable audio module
+- make precomputed of on-the-fly dataloader configurable
+- use of preemphasis is configurable. It is skipped if config.preamphasis == 0

config.json

@@ -1,11 +1,14 @@
 {
-    "model_name": "best-model",
+    "model_name": "TTS-smaller-anneal_lr",
+    "audio_processor": "audio",
     "num_mels": 80,
     "num_freq": 1025,
-    "sample_rate": 20000,
+    "sample_rate": 22000,
     "frame_length_ms": 50,
     "frame_shift_ms": 12.5,
     "preemphasis": 0.97,
+    "min_mel_freq": 125,
+    "max_mel_freq": 7600,
     "min_level_db": -100,
     "ref_level_db": 20,
     "embedding_size": 256,
@@ -13,9 +16,14 @@
 
     "epochs": 1000,
     "lr": 0.002,
+    "lr_scheduler": "AnnealLR",
     "warmup_steps": 4000,
+
+    "lr_decay": 0.5,
+    "decay_step": 100000,
+
     "batch_size": 32,
-    "eval_batch_size":32,
+    "eval_batch_size":-1,
     "r": 5,
 
     "griffin_lim_iters": 60,
@@ -24,9 +32,14 @@
     "num_loader_workers": 4,
 
     "checkpoint": true,
-    "save_step": 750,
+
-    "print_step": 50,
+    "save_step": 25000,
+    "print_step": 10,
+    "run_eval": false,
     "data_path": "/snakepit/shared/data/keithito/LJSpeech-1.1/",
+    "meta_file_train": "metadata.csv",
+    "meta_file_val": null,
+    "dataset": "LJSpeech",
     "min_seq_len": 0,
-    "output_path": "experiments/"
+    "output_path": "../keep/"
-  }
+}

config_kusal.json

@@ -0,0 +1,41 @@
+{
+    "model_name": "TTS-larger-kusal",
+    "audio_processor": "audio",
+     "num_mels": 80,
+    "num_freq": 1025,
+    "sample_rate": 22000,
+    "frame_length_ms": 50,
+    "frame_shift_ms": 12.5,
+    "preemphasis": 0.97,
+    "min_mel_freq": 125,
+    "max_mel_freq": 7600,
+    "min_level_db": -100,
+    "ref_level_db": 20,
+    "embedding_size": 256,
+    "text_cleaner": "english_cleaners",
+
+    "epochs": 1000,
+    "lr": 0.002,
+    "lr_decay": 0.5,
+    "decay_step": 100000,
+    "warmup_steps": 4000,
+    "batch_size": 32,
+    "eval_batch_size":-1,
+    "r": 5,
+
+    "griffin_lim_iters": 60,
+    "power": 1.5,
+
+    "num_loader_workers": 8,
+
+    "checkpoint": true,
+    "save_step": 25000,
+    "print_step": 10,
+    "run_eval": false,
+    "data_path": "/snakepit/shared/data/mycroft/kusal/",
+    "meta_file_train": "prompts.txt",
+    "meta_file_val": null,
+    "dataset": "Kusal",
+    "min_seq_len": 0,
+    "output_path": "../keep/"
+}

datasets/Kusal.py

@@ -0,0 +1,162 @@
+import os
+import glob
+import random
+import numpy as np
+import collections
+import librosa
+import torch
+from torch.utils.data import Dataset
+
+from utils.text import text_to_sequence
+from utils.data import (prepare_data, pad_per_step, prepare_tensor,
+                        prepare_stop_target)
+
+
+class MyDataset(Dataset):
+    def __init__(self,
+                 root_dir,
+                 csv_file,
+                 outputs_per_step,
+                 text_cleaner,
+                 ap,
+                 min_seq_len=0):
+        self.root_dir = root_dir
+        self.wav_dir = os.path.join(root_dir, 'wav')
+        self.wav_files = glob.glob(os.path.join(self.wav_dir, '*.wav'))
+        self._create_file_dict()
+        self.csv_dir = os.path.join(root_dir, csv_file)
+        with open(self.csv_dir, "r", encoding="utf8") as f:
+            self.frames = [
+                line.split('\t') for line in f
+                if line.split('\t')[0] in self.wav_files_dict.keys()
+            ]
+        self.outputs_per_step = outputs_per_step
+        self.sample_rate = ap.sample_rate
+        self.cleaners = text_cleaner
+        self.min_seq_len = min_seq_len
+        self.ap = ap
+        print(" > Reading Kusal from - {}".format(root_dir))
+        print(" | > Number of instances : {}".format(len(self.frames)))
+        self._sort_frames()
+
+    def load_wav(self, filename):
+        """ Load audio and trim silence """
+        try:
+            audio = librosa.core.load(filename, sr=self.sample_rate)[0]
+            margin = int(self.sample_rate * 0.1)
+            audio = audio[margin:-margin]
+            return self._trim_silence(audio)
+        except RuntimeError as e:
+            print(" !! Cannot read file : {}".format(filename))
+
+    def _trim_silence(self, wav):
+        return librosa.effects.trim(
+            wav, top_db=40, frame_length=1024, hop_length=256)[0]
+
+    def _create_file_dict(self):
+        self.wav_files_dict = {}
+        for fn in self.wav_files:
+            parts = fn.split('-')
+            key = parts[1]
+            value = fn
+            try:
+                self.wav_files_dict[key].append(value)
+            except:
+                self.wav_files_dict[key] = [value]
+
+    def _sort_frames(self):
+        r"""Sort sequences in ascending order"""
+        lengths = np.array([len(ins[2]) for ins in self.frames])
+
+        print(" | > Max length sequence {}".format(np.max(lengths)))
+        print(" | > Min length sequence {}".format(np.min(lengths)))
+        print(" | > Avg length sequence {}".format(np.mean(lengths)))
+
+        idxs = np.argsort(lengths)
+        new_frames = []
+        ignored = []
+        for i, idx in enumerate(idxs):
+            length = lengths[idx]
+            if length < self.min_seq_len:
+                ignored.append(idx)
+            else:
+                new_frames.append(self.frames[idx])
+        print(" | > {} instances are ignored by min_seq_len ({})".format(
+            len(ignored), self.min_seq_len))
+        self.frames = new_frames
+
+    def __len__(self):
+        return len(self.frames)
+
+    def __getitem__(self, idx):
+        sidx = self.frames[idx][0]
+        sidx_files = self.wav_files_dict[sidx]
+        file_name = random.choice(sidx_files)
+        wav_name = os.path.join(self.wav_dir, file_name)
+        text = self.frames[idx][2]
+        text = np.asarray(
+            text_to_sequence(text, [self.cleaners]), dtype=np.int32)
+        wav = np.asarray(self.load_wav(wav_name), dtype=np.float32)
+        sample = {'text': text, 'wav': wav, 'item_idx': self.frames[idx][0]}
+        return sample
+
+    def collate_fn(self, batch):
+        r"""
+            Perform preprocessing and create a final data batch:
+            1. PAD sequences with the longest sequence in the batch
+            2. Convert Audio signal to Spectrograms.
+            3. PAD sequences that can be divided by r.
+            4. Convert Numpy to Torch tensors.
+        """
+
+        # Puts each data field into a tensor with outer dimension batch size
+        if isinstance(batch[0], collections.Mapping):
+            keys = list()
+
+            wav = [d['wav'] for d in batch]
+            item_idxs = [d['item_idx'] for d in batch]
+            text = [d['text'] for d in batch]
+
+            text_lenghts = np.array([len(x) for x in text])
+            max_text_len = np.max(text_lenghts)
+
+            linear = [self.ap.spectrogram(w).astype('float32') for w in wav]
+            mel = [self.ap.melspectrogram(w).astype('float32') for w in wav]
+            mel_lengths = [m.shape[1] + 1 for m in mel]  # +1 for zero-frame
+
+            # compute 'stop token' targets
+            stop_targets = [
+                np.array([0.] * (mel_len - 1)) for mel_len in mel_lengths
+            ]
+
+            # PAD stop targets
+            stop_targets = prepare_stop_target(stop_targets,
+                                               self.outputs_per_step)
+
+            # PAD sequences with largest length of the batch
+            text = prepare_data(text).astype(np.int32)
+            wav = prepare_data(wav)
+
+            # PAD features with largest length + a zero frame
+            linear = prepare_tensor(linear, self.outputs_per_step)
+            mel = prepare_tensor(mel, self.outputs_per_step)
+            assert mel.shape[2] == linear.shape[2]
+            timesteps = mel.shape[2]
+
+            # B x T x D
+            linear = linear.transpose(0, 2, 1)
+            mel = mel.transpose(0, 2, 1)
+
+            # convert things to pytorch
+            text_lenghts = torch.LongTensor(text_lenghts)
+            text = torch.LongTensor(text)
+            linear = torch.FloatTensor(linear)
+            mel = torch.FloatTensor(mel)
+            mel_lengths = torch.LongTensor(mel_lengths)
+            stop_targets = torch.FloatTensor(stop_targets)
+
+            return text, text_lenghts, linear, mel, mel_lengths, stop_targets, item_idxs[
+                0]
+
+        raise TypeError(("batch must contain tensors, numbers, dicts or lists;\
+                         found {}".format(type(batch[0]))))

datasets/LJSpeech.py

@@ -6,34 +6,35 @@ import torch
 from torch.utils.data import Dataset
 
 from utils.text import text_to_sequence
-from utils.audio import AudioProcessor
+from utils.data import (prepare_data, pad_per_step, prepare_tensor,
-from utils.data import (prepare_data, pad_per_step,
+                        prepare_stop_target)
-                            prepare_tensor, prepare_stop_target)
 
 
-class LJSpeechDataset(Dataset):
+class MyDataset(Dataset):
-
+    def __init__(self,
-    def __init__(self, csv_file, root_dir, outputs_per_step, sample_rate,
+                 root_dir,
-                 text_cleaner, num_mels, min_level_db, frame_shift_ms,
+                 csv_file,
-                 frame_length_ms, preemphasis, ref_level_db, num_freq, power,
+                 outputs_per_step,
+                 text_cleaner,
+                 ap,
                  min_seq_len=0):
-
-        with open(csv_file, "r", encoding="utf8") as f:
-            self.frames = [line.split('|') for line in f]
         self.root_dir = root_dir
+        self.wav_dir = os.path.join(root_dir, 'wavs')
+        self.csv_dir = os.path.join(root_dir, csv_file)
+        with open(self.csv_dir, "r", encoding="utf8") as f:
+            self.frames = [line.split('|') for line in f]
         self.outputs_per_step = outputs_per_step
-        self.sample_rate = sample_rate
+        self.sample_rate = ap.sample_rate
         self.cleaners = text_cleaner
         self.min_seq_len = min_seq_len
-        self.ap = AudioProcessor(sample_rate, num_mels, min_level_db, frame_shift_ms,
+        self.ap = ap
-                                 frame_length_ms, preemphasis, ref_level_db, num_freq, power)
         print(" > Reading LJSpeech from - {}".format(root_dir))
         print(" | > Number of instances : {}".format(len(self.frames)))
         self._sort_frames()
 
     def load_wav(self, filename):
         try:
-            audio = librosa.core.load(filename, sr=self.sample_rate)
+            audio = librosa.core.load(filename, sr=self.sample_rate)[0]
             return audio
         except RuntimeError as e:
             print(" !! Cannot read file : {}".format(filename))
@@ -63,12 +64,11 @@ class LJSpeechDataset(Dataset):
         return len(self.frames)
 
     def __getitem__(self, idx):
-        wav_name = os.path.join(self.root_dir,
+        wav_name = os.path.join(self.wav_dir, self.frames[idx][0]) + '.wav'
-                                self.frames[idx][0]) + '.wav'
         text = self.frames[idx][1]
-        text = np.asarray(text_to_sequence(
+        text = np.asarray(
-            text, [self.cleaners]), dtype=np.int32)
+            text_to_sequence(text, [self.cleaners]), dtype=np.int32)
-        wav = np.asarray(self.load_wav(wav_name)[0], dtype=np.float32)
+        wav = np.asarray(self.load_wav(wav_name), dtype=np.float32)
         sample = {'text': text, 'wav': wav, 'item_idx': self.frames[idx][0]}
         return sample
 
@@ -97,12 +97,13 @@ class LJSpeechDataset(Dataset):
             mel_lengths = [m.shape[1] + 1 for m in mel]  # +1 for zero-frame
 
             # compute 'stop token' targets
-            stop_targets = [np.array([0.]*(mel_len-1))
+            stop_targets = [
-                            for mel_len in mel_lengths]
+                np.array([0.] * (mel_len - 1)) for mel_len in mel_lengths
+            ]
 
             # PAD stop targets
-            stop_targets = prepare_stop_target(
+            stop_targets = prepare_stop_target(stop_targets,
-                stop_targets, self.outputs_per_step)
+                                               self.outputs_per_step)
 
             # PAD sequences with largest length of the batch
             text = prepare_data(text).astype(np.int32)
@@ -126,8 +127,8 @@ class LJSpeechDataset(Dataset):
             mel_lengths = torch.LongTensor(mel_lengths)
             stop_targets = torch.FloatTensor(stop_targets)
 
-            return text, text_lenghts, linear, mel, mel_lengths, stop_targets, item_idxs[0]
+            return text, text_lenghts, linear, mel, mel_lengths, stop_targets, item_idxs[
+                0]
 
         raise TypeError(("batch must contain tensors, numbers, dicts or lists;\
-                         found {}"
+                         found {}".format(type(batch[0]))))
-                         .format(type(batch[0]))))

datasets/LJSpeechCached.py

@@ -0,0 +1,154 @@
+import os
+import numpy as np
+import collections
+import librosa
+import torch
+from torch.utils.data import Dataset
+
+from utils.text import text_to_sequence
+from utils.data import (prepare_data, pad_per_step, prepare_tensor,
+                        prepare_stop_target)
+
+
+class MyDataset(Dataset):
+    def __init__(self,
+                 root_dir,
+                 csv_file,
+                 outputs_per_step,
+                 text_cleaner,
+                 ap,
+                 min_seq_len=0):
+        self.root_dir = root_dir
+        self.wav_dir = os.path.join(root_dir, 'wavs')
+        self.feat_dir = os.path.join(root_dir, 'loader_data')
+        self.csv_dir = os.path.join(root_dir, csv_file)
+        with open(self.csv_dir, "r", encoding="utf8") as f:
+            self.frames = [line.split('|') for line in f]
+        self.outputs_per_step = outputs_per_step
+        self.sample_rate = ap.sample_rate
+        self.cleaners = text_cleaner
+        self.min_seq_len = min_seq_len
+        self.items = [None] * len(self.frames)
+        print(" > Reading LJSpeech from - {}".format(root_dir))
+        print(" | > Number of instances : {}".format(len(self.frames)))
+        self._sort_frames()
+
+    def load_wav(self, filename):
+        try:
+            audio = librosa.core.load(filename, sr=self.sample_rate)
+            return audio
+        except RuntimeError as e:
+            print(" !! Cannot read file : {}".format(filename))
+
+    def load_np(self, filename):
+        data = np.load(filename).astype('float32')
+        return data
+
+    def _sort_frames(self):
+        r"""Sort sequences in ascending order"""
+        lengths = np.array([len(ins[1]) for ins in self.frames])
+
+        print(" | > Max length sequence {}".format(np.max(lengths)))
+        print(" | > Min length sequence {}".format(np.min(lengths)))
+        print(" | > Avg length sequence {}".format(np.mean(lengths)))
+
+        idxs = np.argsort(lengths)
+        new_frames = []
+        ignored = []
+        for i, idx in enumerate(idxs):
+            length = lengths[idx]
+            if length < self.min_seq_len:
+                ignored.append(idx)
+            else:
+                new_frames.append(self.frames[idx])
+        print(" | > {} instances are ignored by min_seq_len ({})".format(
+            len(ignored), self.min_seq_len))
+        self.frames = new_frames
+
+    def __len__(self):
+        return len(self.frames)
+
+    def __getitem__(self, idx):
+        if self.items[idx] is None:
+            wav_name = os.path.join(self.wav_dir, self.frames[idx][0]) + '.wav'
+            mel_name = os.path.join(self.feat_dir,
+                                    self.frames[idx][0]) + '.mel.npy'
+            linear_name = os.path.join(self.feat_dir,
+                                       self.frames[idx][0]) + '.linear.npy'
+            text = self.frames[idx][1]
+            text = np.asarray(
+                text_to_sequence(text, [self.cleaners]), dtype=np.int32)
+            wav = np.asarray(self.load_wav(wav_name)[0], dtype=np.float32)
+            mel = self.load_np(mel_name)
+            linear = self.load_np(linear_name)
+            sample = {
+                'text': text,
+                'wav': wav,
+                'item_idx': self.frames[idx][0],
+                'mel': mel,
+                'linear': linear
+            }
+            self.items[idx] = sample
+        else:
+            sample = self.items[idx]
+        return sample
+
+    def collate_fn(self, batch):
+        r"""
+            Perform preprocessing and create a final data batch:
+            1. PAD sequences with the longest sequence in the batch
+            2. Convert Audio signal to Spectrograms.
+            3. PAD sequences that can be divided by r.
+            4. Convert Numpy to Torch tensors.
+        """
+
+        # Puts each data field into a tensor with outer dimension batch size
+        if isinstance(batch[0], collections.Mapping):
+            keys = list()
+
+            wav = [d['wav'] for d in batch]
+            item_idxs = [d['item_idx'] for d in batch]
+            text = [d['text'] for d in batch]
+            mel = [d['mel'] for d in batch]
+            linear = [d['linear'] for d in batch]
+
+            text_lenghts = np.array([len(x) for x in text])
+            max_text_len = np.max(text_lenghts)
+            mel_lengths = [m.shape[1] + 1 for m in mel]  # +1 for zero-frame
+
+            # compute 'stop token' targets
+            stop_targets = [
+                np.array([0.] * (mel_len - 1)) for mel_len in mel_lengths
+            ]
+
+            # PAD stop targets
+            stop_targets = prepare_stop_target(stop_targets,
+                                               self.outputs_per_step)
+
+            # PAD sequences with largest length of the batch
+            text = prepare_data(text).astype(np.int32)
+            wav = prepare_data(wav)
+
+            # PAD features with largest length + a zero frame
+            linear = prepare_tensor(linear, self.outputs_per_step)
+            mel = prepare_tensor(mel, self.outputs_per_step)
+            assert mel.shape[2] == linear.shape[2]
+            timesteps = mel.shape[2]
+
+            # B x T x D
+            linear = linear.transpose(0, 2, 1)
+            mel = mel.transpose(0, 2, 1)
+
+            # convert things to pytorch
+            text_lenghts = torch.LongTensor(text_lenghts)
+            text = torch.LongTensor(text)
+            linear = torch.FloatTensor(linear)
+            mel = torch.FloatTensor(mel)
+            mel_lengths = torch.LongTensor(mel_lengths)
+            stop_targets = torch.FloatTensor(stop_targets)
+
+            return text, text_lenghts, linear, mel, mel_lengths, stop_targets, item_idxs[
+                0]
+
+        raise TypeError(("batch must contain tensors, numbers, dicts or lists;\
+                         found {}".format(type(batch[0]))))

datasets/TWEB.py

@@ -7,15 +7,25 @@ from torch.utils.data import Dataset
 
 from TTS.utils.text import text_to_sequence
 from TTS.utils.audio import AudioProcessor
-from TTS.utils.data import (prepare_data, pad_per_step,
+from TTS.utils.data import (prepare_data, pad_per_step, prepare_tensor,
-                            prepare_tensor, prepare_stop_target)
+                            prepare_stop_target)
 
 
 class TWEBDataset(Dataset):
-
+    def __init__(self,
-    def __init__(self, csv_file, root_dir, outputs_per_step, sample_rate,
+                 csv_file,
-                 text_cleaner, num_mels, min_level_db, frame_shift_ms,
+                 root_dir,
-                 frame_length_ms, preemphasis, ref_level_db, num_freq, power,
+                 outputs_per_step,
+                 sample_rate,
+                 text_cleaner,
+                 num_mels,
+                 min_level_db,
+                 frame_shift_ms,
+                 frame_length_ms,
+                 preemphasis,
+                 ref_level_db,
+                 num_freq,
+                 power,
                  min_seq_len=0):
 
         with open(csv_file, "r") as f:
@@ -25,8 +35,9 @@ class TWEBDataset(Dataset):
         self.sample_rate = sample_rate
         self.cleaners = text_cleaner
         self.min_seq_len = min_seq_len
-        self.ap = AudioProcessor(sample_rate, num_mels, min_level_db, frame_shift_ms,
+        self.ap = AudioProcessor(sample_rate, num_mels, min_level_db,
-                                 frame_length_ms, preemphasis, ref_level_db, num_freq, power)
+                                 frame_shift_ms, frame_length_ms, preemphasis,
+                                 ref_level_db, num_freq, power)
         print(" > Reading TWEB from - {}".format(root_dir))
         print(" | > Number of instances : {}".format(len(self.frames)))
         self._sort_frames()
@@ -63,11 +74,10 @@ class TWEBDataset(Dataset):
         return len(self.frames)
 
     def __getitem__(self, idx):
-        wav_name = os.path.join(self.root_dir,
+        wav_name = os.path.join(self.root_dir, self.frames[idx][0]) + '.wav'
-                                self.frames[idx][0]) + '.wav'
         text = self.frames[idx][1]
-        text = np.asarray(text_to_sequence(
+        text = np.asarray(
-            text, [self.cleaners]), dtype=np.int32)
+            text_to_sequence(text, [self.cleaners]), dtype=np.int32)
         wav = np.asarray(self.load_wav(wav_name)[0], dtype=np.float32)
         sample = {'text': text, 'wav': wav, 'item_idx': self.frames[idx][0]}
         return sample
@@ -97,12 +107,13 @@ class TWEBDataset(Dataset):
             mel_lengths = [m.shape[1] + 1 for m in mel]  # +1 for zero-frame
 
             # compute 'stop token' targets
-            stop_targets = [np.array([0.]*(mel_len-1))
+            stop_targets = [
-                            for mel_len in mel_lengths]
+                np.array([0.] * (mel_len - 1)) for mel_len in mel_lengths
+            ]
 
             # PAD stop targets
-            stop_targets = prepare_stop_target(
+            stop_targets = prepare_stop_target(stop_targets,
-                stop_targets, self.outputs_per_step)
+                                               self.outputs_per_step)
 
             # PAD sequences with largest length of the batch
             text = prepare_data(text).astype(np.int32)
@@ -126,8 +137,8 @@ class TWEBDataset(Dataset):
             mel_lengths = torch.LongTensor(mel_lengths)
             stop_targets = torch.FloatTensor(stop_targets)
 
-            return text, text_lenghts, linear, mel, mel_lengths, stop_targets, item_idxs[0]
+            return text, text_lenghts, linear, mel, mel_lengths, stop_targets, item_idxs[
+                0]
 
         raise TypeError(("batch must contain tensors, numbers, dicts or lists;\
-                         found {}"
+                         found {}".format(type(batch[0]))))
-                         .format(type(batch[0]))))

debug_config.py

@@ -10,7 +10,6 @@
     "hidden_size": 128,
     "embedding_size": 256,
     "text_cleaner": "english_cleaners",
-
     "epochs": 200,
     "lr": 0.01,
     "lr_patience": 2,
@@ -19,9 +18,7 @@
     "griffinf_lim_iters": 60,
     "power": 1.5,
     "r": 5,
-
     "num_loader_workers": 16,
-
     "save_step": 1,
     "data_path": "/data/shared/KeithIto/LJSpeech-1.0",
     "output_path": "result",

extract_feats.py

@@ -0,0 +1,108 @@
+'''
+Extract spectrograms and save them to file for training
+'''
+import os
+import sys
+import time
+import glob
+import argparse
+import librosa
+import numpy as np
+import tqdm
+from utils.generic_utils import load_config
+
+from multiprocessing import Pool
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--data_path', type=str, help='Data folder.')
+    parser.add_argument('--out_path', type=str, help='Output folder.')
+    parser.add_argument(
+        '--config', type=str, help='conf.json file for run settings.')
+    parser.add_argument(
+        "--num_proc", type=int, default=8, help="number of processes.")
+    parser.add_argument(
+        "--trim_silence",
+        type=bool,
+        default=False,
+        help="trim silence in the voice clip.")
+    args = parser.parse_args()
+    DATA_PATH = args.data_path
+    OUT_PATH = args.out_path
+    CONFIG = load_config(args.config)
+
+    print(" > Input path: ", DATA_PATH)
+    print(" > Output path: ", OUT_PATH)
+
+    audio = importlib.import_module('utils.' + c.audio_processor)
+    AudioProcessor = getattr(audio, 'AudioProcessor')
+    ap = AudioProcessor(
+        sample_rate=CONFIG.sample_rate,
+        num_mels=CONFIG.num_mels,
+        min_level_db=CONFIG.min_level_db,
+        frame_shift_ms=CONFIG.frame_shift_ms,
+        frame_length_ms=CONFIG.frame_length_ms,
+        ref_level_db=CONFIG.ref_level_db,
+        num_freq=CONFIG.num_freq,
+        power=CONFIG.power,
+        preemphasis=CONFIG.preemphasis,
+        min_mel_freq=CONFIG.min_mel_freq,
+        max_mel_freq=CONFIG.max_mel_freq)
+
+    def trim_silence(self, wav):
+        margin = int(CONFIG.sample_rate * 0.1)
+        wav = wav[margin:-margin]
+        return librosa.effects.trim(
+            wav, top_db=40, frame_length=1024, hop_length=256)[0]
+
+    def extract_mel(file_path):
+        # x, fs = sf.read(file_path)
+        x, fs = librosa.load(file_path, CONFIG.sample_rate)
+        if args.trim_silence:
+            x = trim_silence(x)
+        mel = ap.melspectrogram(x.astype('float32')).astype('float32')
+        linear = ap.spectrogram(x.astype('float32')).astype('float32')
+        file_name = os.path.basename(file_path).replace(".wav", "")
+        mel_file = file_name + ".mel"
+        linear_file = file_name + ".linear"
+        np.save(os.path.join(OUT_PATH, mel_file), mel, allow_pickle=False)
+        np.save(
+            os.path.join(OUT_PATH, linear_file), linear, allow_pickle=False)
+        mel_len = mel.shape[1]
+        linear_len = linear.shape[1]
+        wav_len = x.shape[0]
+        print(" > " + file_path, flush=True)
+        return file_path, mel_file, linear_file, str(wav_len), str(
+            mel_len), str(linear_len)
+
+    glob_path = os.path.join(DATA_PATH, "*.wav")
+    print(" > Reading wav: {}".format(glob_path))
+    file_names = glob.glob(glob_path, recursive=True)
+
+    if __name__ == "__main__":
+        print(" > Number of files: %i" % (len(file_names)))
+        if not os.path.exists(OUT_PATH):
+            os.makedirs(OUT_PATH)
+            print(" > A new folder created at {}".format(OUT_PATH))
+
+        r = []
+        if args.num_proc > 1:
+            print(" > Using {} processes.".format(args.num_proc))
+            with Pool(args.num_proc) as p:
+                r = list(
+                    tqdm.tqdm(
+                        p.imap(extract_mel, file_names),
+                        total=len(file_names)))
+                # r = list(p.imap(extract_mel, file_names))
+        else:
+            print(" > Using single process run.")
+            for file_name in file_names:
+                print(" > ", file_name)
+                r.append(extract_mel(file_name))
+
+        file_path = os.path.join(OUT_PATH, "meta_fftnet.csv")
+        file = open(file_path, "w")
+        for line in r:
+            line = ", ".join(line)
+            file.write(line + '\n')
+        file.close()

layers/attention.py

@@ -1,20 +1,21 @@
 import torch
 from torch import nn
 from torch.nn import functional as F
+from utils.generic_utils import sequence_mask
 
 
 class BahdanauAttention(nn.Module):
-    def __init__(self, annot_dim, query_dim, hidden_dim):
+    def __init__(self, annot_dim, query_dim, attn_dim):
         super(BahdanauAttention, self).__init__()
-        self.query_layer = nn.Linear(query_dim, hidden_dim, bias=True)
+        self.query_layer = nn.Linear(query_dim, attn_dim, bias=True)
-        self.annot_layer = nn.Linear(annot_dim, hidden_dim, bias=True)
+        self.annot_layer = nn.Linear(annot_dim, attn_dim, bias=True)
-        self.v = nn.Linear(hidden_dim, 1, bias=False)
+        self.v = nn.Linear(attn_dim, 1, bias=False)
 
     def forward(self, annots, query):
         """
         Shapes:
-            - query: (batch, 1, dim) or (batch, dim)
             - annots: (batch, max_time, dim)
+            - query: (batch, 1, dim) or (batch, dim)
         """
         if query.dim() == 2:
             # insert time-axis for broadcasting
@@ -23,37 +24,97 @@ class BahdanauAttention(nn.Module):
         processed_query = self.query_layer(query)
         processed_annots = self.annot_layer(annots)
         # (batch, max_time, 1)
-        alignment = self.v(nn.functional.tanh(
+        alignment = self.v(
-            processed_query + processed_annots))
+            nn.functional.tanh(processed_query + processed_annots))
         # (batch, max_time)
         return alignment.squeeze(-1)
 
 
-def get_mask_from_lengths(inputs, inputs_lengths):
+class LocationSensitiveAttention(nn.Module):
-    """Get mask tensor from list of length
+    """Location sensitive attention following
+    https://arxiv.org/pdf/1506.07503.pdf"""
 
-    Args:
+    def __init__(self,
-        inputs: Tensor in size (batch, max_time, dim)
+                 annot_dim,
-        inputs_lengths: array like
+                 query_dim,
-    """
+                 attn_dim,
-    mask = inputs.data.new(inputs.size(0), inputs.size(1)).byte().zero_()
+                 kernel_size=7,
-    for idx, l in enumerate(inputs_lengths):
+                 filters=20):
-        mask[idx][:l] = 1
+        super(LocationSensitiveAttention, self).__init__()
-    return ~mask
+        self.kernel_size = kernel_size
+        self.filters = filters
+        padding = int((kernel_size - 1) / 2)
+        self.loc_conv = nn.Conv1d(
+            2,
+            filters,
+            kernel_size=kernel_size,
+            stride=1,
+            padding=padding,
+            bias=False)
+        self.loc_linear = nn.Linear(filters, attn_dim)
+        self.query_layer = nn.Linear(query_dim, attn_dim, bias=True)
+        self.annot_layer = nn.Linear(annot_dim, attn_dim, bias=True)
+        self.v = nn.Linear(attn_dim, 1, bias=False)
+
+    def forward(self, annot, query, loc):
+        """
+        Shapes:
+            - annot: (batch, max_time, dim)
+            - query: (batch, 1, dim) or (batch, dim)
+            - loc: (batch, 2, max_time)
+        """
+        if query.dim() == 2:
+            # insert time-axis for broadcasting
+            query = query.unsqueeze(1)
+        loc_conv = self.loc_conv(loc)
+        loc_conv = loc_conv.transpose(1, 2)
+        processed_loc = self.loc_linear(loc_conv)
+        processed_query = self.query_layer(query)
+        processed_annots = self.annot_layer(annot)
+        alignment = self.v(
+            nn.functional.tanh(processed_query + processed_annots +
+                               processed_loc))
+        # (batch, max_time)
+        return alignment.squeeze(-1)
 
 
-class AttentionRNN(nn.Module):
+class AttentionRNNCell(nn.Module):
-    def __init__(self, out_dim, annot_dim, memory_dim,
+    def __init__(self, out_dim, rnn_dim, annot_dim, memory_dim, align_model):
-                 score_mask_value=-float("inf")):
+        r"""
-        super(AttentionRNN, self).__init__()
+        General Attention RNN wrapper
-        self.rnn_cell = nn.GRUCell(out_dim + memory_dim, out_dim)
-        self.alignment_model = BahdanauAttention(annot_dim, out_dim, out_dim)
-        self.score_mask_value = score_mask_value
 
-    def forward(self, memory, context, rnn_state, annotations,
+        Args:
-                mask=None, annotations_lengths=None):
+            out_dim (int): context vector feature dimension.
-        if annotations_lengths is not None and mask is None:
+            rnn_dim (int): rnn hidden state dimension.
-            mask = get_mask_from_lengths(annotations, annotations_lengths)
+            annot_dim (int): annotation vector feature dimension.
+            memory_dim (int): memory vector (decoder output) feature dimension.
+            align_model (str): 'b' for Bahdanau, 'ls' Location Sensitive alignment.
+        """
+        super(AttentionRNNCell, self).__init__()
+        self.align_model = align_model
+        self.rnn_cell = nn.GRUCell(annot_dim + memory_dim, rnn_dim)
+        # pick bahdanau or location sensitive attention
+        if align_model == 'b':
+            self.alignment_model = BahdanauAttention(annot_dim, rnn_dim,
+                                                     out_dim)
+        if align_model == 'ls':
+            self.alignment_model = LocationSensitiveAttention(
+                annot_dim, rnn_dim, out_dim)
+        else:
+            raise RuntimeError(" Wrong alignment model name: {}. Use\
+                'b' (Bahdanau) or 'ls' (Location Sensitive)."
+                               .format(align_model))
+
+    def forward(self, memory, context, rnn_state, annots, atten, mask):
+        """
+        Shapes:
+            - memory: (batch, 1, dim) or (batch, dim)
+            - context: (batch, dim)
+            - rnn_state: (batch, out_dim)
+            - annots: (batch, max_time, annot_dim)
+            - atten: (batch, 2, max_time)
+            - mask: (batch,)
+        """
         # Concat input query and previous context context
         rnn_input = torch.cat((memory, context), -1)
         # Feed it to RNN
@@ -62,16 +123,18 @@ class AttentionRNN(nn.Module):
         # Alignment
         # (batch, max_time)
         # e_{ij} = a(s_{i-1}, h_j)
-        alignment = self.alignment_model(annotations, rnn_output)
+        if self.align_model is 'b':
-        # TODO: needs recheck.
+            alignment = self.alignment_model(annots, rnn_output)
+        else:
+            alignment = self.alignment_model(annots, rnn_output, atten)
         if mask is not None:
-            mask = mask.view(query.size(0), -1)
+            mask = mask.view(memory.size(0), -1)
-            alignment.data.masked_fill_(mask, self.score_mask_value)
+            alignment.masked_fill_(1 - mask, -float("inf"))
         # Normalize context weight
         alignment = F.softmax(alignment, dim=-1)
         # Attention context vector
         # (batch, 1, dim)
         # c_i = \sum_{j=1}^{T_x} \alpha_{ij} h_j
-        context = torch.bmm(alignment.unsqueeze(1), annotations)
+        context = torch.bmm(alignment.unsqueeze(1), annots)
         context = context.squeeze(1)
         return rnn_output, context, alignment

layers/custom_layers.py

@@ -2,7 +2,6 @@
 import torch
 from torch import nn
 
-
 # class StopProjection(nn.Module):
 #     r""" Simple projection layer to predict the "stop token"
 

layers/losses.py

@@ -1,24 +1,10 @@
 import torch
 from torch.nn import functional
 from torch import nn
-
+from utils.generic_utils import sequence_mask
-
-# from https://gist.github.com/jihunchoi/f1434a77df9db1bb337417854b398df1
-def _sequence_mask(sequence_length, max_len=None):
-    if max_len is None:
-        max_len = sequence_length.data.max()
-    batch_size = sequence_length.size(0)
-    seq_range = torch.arange(0, max_len).long()
-    seq_range_expand = seq_range.unsqueeze(0).expand(batch_size, max_len)
-    if sequence_length.is_cuda:
-        seq_range_expand = seq_range_expand.cuda()
-    seq_length_expand = (sequence_length.unsqueeze(1)
-                         .expand_as(seq_range_expand))
-    return seq_range_expand < seq_length_expand
 
 
 class L1LossMasked(nn.Module):
-
     def __init__(self):
         super(L1LossMasked, self).__init__()
 
@@ -44,14 +30,53 @@ class L1LossMasked(nn.Module):
         # target_flat: (batch * max_len, dim)
         target_flat = target.view(-1, target.shape[-1])
         # losses_flat: (batch * max_len, dim)
-        losses_flat = functional.l1_loss(input, target_flat, size_average=False,
+        losses_flat = functional.l1_loss(
-                                         reduce=False)
+            input, target_flat, size_average=False, reduce=False)
         # losses: (batch, max_len, dim)
         losses = losses_flat.view(*target.size())
 
         # mask: (batch, max_len, 1)
-        mask = _sequence_mask(sequence_length=length,
+        mask = sequence_mask(
-                              max_len=target.size(1)).unsqueeze(2)
+            sequence_length=length, max_len=target.size(1)).unsqueeze(2)
+        losses = losses * mask.float()
+        loss = losses.sum() / (length.float().sum() * float(target.shape[2]))
+        return loss
+
+
+class MSELossMasked(nn.Module):
+    def __init__(self):
+        super(MSELossMasked, self).__init__()
+
+    def forward(self, input, target, length):
+        """
+        Args:
+            input: A Variable containing a FloatTensor of size
+                (batch, max_len, dim) which contains the
+                unnormalized probability for each class.
+            target: A Variable containing a LongTensor of size
+                (batch, max_len, dim) which contains the index of the true
+                class for each corresponding step.
+            length: A Variable containing a LongTensor of size (batch,)
+                which contains the length of each data in a batch.
+        Returns:
+            loss: An average loss value masked by the length.
+        """
+        input = input.contiguous()
+        target = target.contiguous()
+
+        # logits_flat: (batch * max_len, dim)
+        input = input.view(-1, input.shape[-1])
+        # target_flat: (batch * max_len, dim)
+        target_flat = target.view(-1, target.shape[-1])
+        # losses_flat: (batch * max_len, dim)
+        losses_flat = functional.mse_loss(
+            input, target_flat, size_average=False, reduce=False)
+        # losses: (batch, max_len, dim)
+        losses = losses_flat.view(*target.size())
+
+        # mask: (batch, max_len, 1)
+        mask = sequence_mask(
+            sequence_length=length, max_len=target.size(1)).unsqueeze(2)
         losses = losses * mask.float()
         loss = losses.sum() / (length.float().sum() * float(target.shape[2]))
         return loss

layers/tacotron.py

@@ -1,8 +1,7 @@
 # coding: utf-8
 import torch
 from torch import nn
-from .attention import AttentionRNN
+from .attention import AttentionRNNCell
-from .attention import get_mask_from_lengths
 
 
 class Prenet(nn.Module):
@@ -18,9 +17,10 @@ class Prenet(nn.Module):
     def __init__(self, in_features, out_features=[256, 128]):
         super(Prenet, self).__init__()
         in_features = [in_features] + out_features[:-1]
-        self.layers = nn.ModuleList(
+        self.layers = nn.ModuleList([
-            [nn.Linear(in_size, out_size)
+            nn.Linear(in_size, out_size)
-             for (in_size, out_size) in zip(in_features, out_features)])
+            for (in_size, out_size) in zip(in_features, out_features)
+        ])
         self.relu = nn.ReLU()
         self.dropout = nn.Dropout(0.5)
 
@@ -48,12 +48,21 @@ class BatchNormConv1d(nn.Module):
         - output: batch x dims
     """
 
-    def __init__(self, in_channels, out_channels, kernel_size, stride, padding,
+    def __init__(self,
+                 in_channels,
+                 out_channels,
+                 kernel_size,
+                 stride,
+                 padding,
                  activation=None):
         super(BatchNormConv1d, self).__init__()
-        self.conv1d = nn.Conv1d(in_channels, out_channels,
+        self.conv1d = nn.Conv1d(
-                                kernel_size=kernel_size,
+            in_channels,
-                                stride=stride, padding=padding, bias=False)
+            out_channels,
+            kernel_size=kernel_size,
+            stride=stride,
+            padding=padding,
+            bias=False)
         # Following tensorflow's default parameters
         self.bn = nn.BatchNorm1d(out_channels, momentum=0.99, eps=1e-3)
         self.activation = activation
@@ -98,36 +107,66 @@ class CBHG(nn.Module):
             - output: batch x time x dim*2
     """
 
-    def __init__(self, in_features, K=16, projections=[128, 128], num_highways=4):
+    def __init__(self,
+                 in_features,
+                 K=16,
+                 conv_bank_features=128,
+                 conv_projections=[128, 128],
+                 highway_features=128,
+                 gru_features=128,
+                 num_highways=4):
         super(CBHG, self).__init__()
         self.in_features = in_features
+        self.conv_bank_features = conv_bank_features
+        self.highway_features = highway_features
+        self.gru_features = gru_features
+        self.conv_projections = conv_projections
         self.relu = nn.ReLU()
         # list of conv1d bank with filter size k=1...K
         # TODO: try dilational layers instead
-        self.conv1d_banks = nn.ModuleList(
+        self.conv1d_banks = nn.ModuleList([
-            [BatchNormConv1d(in_features, in_features, kernel_size=k, stride=1,
+            BatchNormConv1d(
-                             padding=k // 2, activation=self.relu)
+                in_features,
-                for k in range(1, K + 1)])
+                conv_bank_features,
+                kernel_size=k,
+                stride=1,
+                padding=k // 2,
+                activation=self.relu) for k in range(1, K + 1)
+        ])
         # max pooling of conv bank
         # TODO: try average pooling OR larger kernel size
         self.max_pool1d = nn.MaxPool1d(kernel_size=2, stride=1, padding=1)
-        out_features = [K * in_features] + projections[:-1]
+        out_features = [K * conv_bank_features] + conv_projections[:-1]
-        activations = [self.relu] * (len(projections) - 1)
+        activations = [self.relu] * (len(conv_projections) - 1)
         activations += [None]
         # setup conv1d projection layers
         layer_set = []
-        for (in_size, out_size, ac) in zip(out_features, projections, activations):
+        for (in_size, out_size, ac) in zip(out_features, conv_projections,
-            layer = BatchNormConv1d(in_size, out_size, kernel_size=3, stride=1,
+                                           activations):
-                                    padding=1, activation=ac)
+            layer = BatchNormConv1d(
+                in_size,
+                out_size,
+                kernel_size=3,
+                stride=1,
+                padding=1,
+                activation=ac)
             layer_set.append(layer)
         self.conv1d_projections = nn.ModuleList(layer_set)
         # setup Highway layers
-        self.pre_highway = nn.Linear(projections[-1], in_features, bias=False)
+        if self.highway_features != conv_projections[-1]:
-        self.highways = nn.ModuleList(
+            self.pre_highway = nn.Linear(
-            [Highway(in_features, in_features) for _ in range(num_highways)])
+                conv_projections[-1], highway_features, bias=False)
+        self.highways = nn.ModuleList([
+            Highway(highway_features, highway_features)
+            for _ in range(num_highways)
+        ])
         # bi-directional GPU layer
         self.gru = nn.GRU(
-            in_features, in_features, 1, batch_first=True, bidirectional=True)
+            gru_features,
+            gru_features,
+            1,
+            batch_first=True,
+            bidirectional=True)
 
     def forward(self, inputs):
         # (B, T_in, in_features)
@@ -137,7 +176,7 @@ class CBHG(nn.Module):
         if x.size(-1) == self.in_features:
             x = x.transpose(1, 2)
         T = x.size(-1)
-        # (B, in_features*K, T_in)
+        # (B, hid_features*K, T_in)
         # Concat conv1d bank outputs
         outs = []
         for conv1d in self.conv1d_banks:
@@ -145,35 +184,51 @@ class CBHG(nn.Module):
             out = out[:, :, :T]
             outs.append(out)
         x = torch.cat(outs, dim=1)
-        assert x.size(1) == self.in_features * len(self.conv1d_banks)
+        assert x.size(1) == self.conv_bank_features * len(self.conv1d_banks)
         x = self.max_pool1d(x)[:, :, :T]
         for conv1d in self.conv1d_projections:
             x = conv1d(x)
-        # (B, T_in, in_features)
+        # (B, T_in, hid_feature)
-        # Back to the original shape
         x = x.transpose(1, 2)
-        if x.size(-1) != self.in_features:
+        # Back to the original shape
+        x += inputs
+        if self.highway_features != self.conv_projections[-1]:
             x = self.pre_highway(x)
         # Residual connection
         # TODO: try residual scaling as in Deep Voice 3
         # TODO: try plain residual layers
-        x += inputs
         for highway in self.highways:
             x = highway(x)
-        # (B, T_in, in_features*2)
+        # (B, T_in, hid_features*2)
         # TODO: replace GRU with convolution as in Deep Voice 3
         self.gru.flatten_parameters()
         outputs, _ = self.gru(x)
         return outputs
 
 
+class EncoderCBHG(nn.Module):
+    def __init__(self):
+        super(EncoderCBHG, self).__init__()
+        self.cbhg = CBHG(
+            128,
+            K=16,
+            conv_bank_features=128,
+            conv_projections=[128, 128],
+            highway_features=128,
+            gru_features=128,
+            num_highways=4)
+
+    def forward(self, x):
+        return self.cbhg(x)
+
+
 class Encoder(nn.Module):
     r"""Encapsulate Prenet and CBHG modules for encoder"""
 
     def __init__(self, in_features):
         super(Encoder, self).__init__()
         self.prenet = Prenet(in_features, out_features=[256, 128])
-        self.cbhg = CBHG(128, K=16, projections=[128, 128])
+        self.cbhg = EncoderCBHG()
 
     def forward(self, inputs):
         r"""
@@ -188,6 +243,21 @@ class Encoder(nn.Module):
         return self.cbhg(inputs)
 
 
+class PostCBHG(nn.Module):
+    def __init__(self, mel_dim):
+        super(PostCBHG, self).__init__()
+        self.cbhg = CBHG(
+            mel_dim,
+            K=8,
+            conv_bank_features=80,
+            conv_projections=[160, mel_dim],
+            highway_features=80,
+            gru_features=80,
+            num_highways=4)
+    def forward(self, x):
+        return self.cbhg(x)
+
+
 class Decoder(nn.Module):
     r"""Decoder module.
 
@@ -195,20 +265,25 @@ class Decoder(nn.Module):
         in_features (int): input vector (encoder output) sample size.
         memory_dim (int): memory vector (prev. time-step output) sample size.
         r (int): number of outputs per time step.
-        eps (float): threshold for detecting the end of a sentence.
     """
 
     def __init__(self, in_features, memory_dim, r):
         super(Decoder, self).__init__()
         self.r = r
+        self.in_features = in_features
         self.max_decoder_steps = 200
         self.memory_dim = memory_dim
         # memory -> |Prenet| -> processed_memory
         self.prenet = Prenet(memory_dim * r, out_features=[256, 128])
-        # processed_inputs, processed_memory -> |Attention| -> Attention, Alignment, RNN_State
+        # processed_inputs, processed_memory -> |Attention| -> Attention, attention, RNN_State
-        self.attention_rnn = AttentionRNN(256, in_features, 128)
+        self.attention_rnn = AttentionRNNCell(
+            out_dim=128,
+            rnn_dim=256,
+            annot_dim=in_features,
+            memory_dim=128,
+            align_model='ls')
         # (processed_memory | attention context) -> |Linear| -> decoder_RNN_input
-        self.project_to_decoder_in = nn.Linear(256+in_features, 256)
+        self.project_to_decoder_in = nn.Linear(256 + in_features, 256)
         # decoder_RNN_input -> |RNN| -> RNN_state
         self.decoder_rnns = nn.ModuleList(
             [nn.GRUCell(256, 256) for _ in range(2)])
@@ -216,7 +291,7 @@ class Decoder(nn.Module):
         self.proj_to_mel = nn.Linear(256, memory_dim * r)
         self.stopnet = StopNet(r, memory_dim)
 
-    def forward(self, inputs, memory=None):
+    def forward(self, inputs, memory=None, mask=None):
         """
         Decoder forward step.
 
@@ -228,34 +303,42 @@ class Decoder(nn.Module):
             memory (None): Decoder memory (autoregression. If None (at eval-time),
               decoder outputs are used as decoder inputs. If None, it uses the last
               output as the input.
+            mask (None): Attention mask for sequence padding.
 
         Shapes:
             - inputs: batch x time x encoder_out_dim
             - memory: batch x #mel_specs x mel_spec_dim
         """
         B = inputs.size(0)
+        T = inputs.size(1)
         # Run greedy decoding if memory is None
         greedy = not self.training
         if memory is not None:
             # Grouping multiple frames if necessary
             if memory.size(-1) == self.memory_dim:
                 memory = memory.view(B, memory.size(1) // self.r, -1)
-                " !! Dimension mismatch {} vs {} * {}".format(memory.size(-1),
+                " !! Dimension mismatch {} vs {} * {}".format(
-                                                              self.memory_dim, self.r)
+                    memory.size(-1), self.memory_dim, self.r)
             T_decoder = memory.size(1)
-        # go frame - 0 frames tarting the sequence
+        # go frame as zeros matrix
         initial_memory = inputs.data.new(B, self.memory_dim * self.r).zero_()
-        # Init decoder states
+        # decoder states
         attention_rnn_hidden = inputs.data.new(B, 256).zero_()
-        decoder_rnn_hiddens = [inputs.data.new(B, 256).zero_()
+        decoder_rnn_hiddens = [
-            for _ in range(len(self.decoder_rnns))]
+            inputs.data.new(B, 256).zero_()
-        current_context_vec = inputs.data.new(B, 256).zero_()
+            for _ in range(len(self.decoder_rnns))
-        stopnet_rnn_hidden = inputs.data.new(B, self.r * self.memory_dim).zero_()
+        ]
+        current_context_vec = inputs.data.new(B, self.in_features).zero_()
+        stopnet_rnn_hidden = inputs.data.new(B,
+                                             self.r * self.memory_dim).zero_()
+        # attention states
+        attention = inputs.data.new(B, T).zero_()
+        attention_cum = inputs.data.new(B, T).zero_()
         # Time first (T_decoder, B, memory_dim)
         if memory is not None:
             memory = memory.transpose(0, 1)
         outputs = []
-        alignments = []
+        attentions = []
         stop_tokens = []
         t = 0
         memory_input = initial_memory
@@ -264,12 +347,16 @@ class Decoder(nn.Module):
                 if greedy:
                     memory_input = outputs[-1]
                 else:
-                    memory_input = memory[t-1]
+                    memory_input = memory[t - 1]
             # Prenet
             processed_memory = self.prenet(memory_input)
             # Attention RNN
-            attention_rnn_hidden, current_context_vec, alignment = self.attention_rnn(
+            attention_cat = torch.cat(
-                processed_memory, current_context_vec, attention_rnn_hidden, inputs)
+                (attention.unsqueeze(1), attention_cum.unsqueeze(1)), dim=1)
+            attention_rnn_hidden, current_context_vec, attention = self.attention_rnn(
+                processed_memory, current_context_vec, attention_rnn_hidden,
+                inputs, attention_cat, mask)
+            attention_cum += attention
             # Concat RNN output and attention context vector
             decoder_input = self.project_to_decoder_in(
                 torch.cat((attention_rnn_hidden, current_context_vec), -1))
@@ -284,27 +371,28 @@ class Decoder(nn.Module):
             output = self.proj_to_mel(decoder_output)
             stop_input = output
             # predict stop token
-            stop_token, stopnet_rnn_hidden = self.stopnet(stop_input, stopnet_rnn_hidden)
+            stop_token, stopnet_rnn_hidden = self.stopnet(
+                stop_input, stopnet_rnn_hidden)
             outputs += [output]
-            alignments += [alignment]
+            attentions += [attention]
             stop_tokens += [stop_token]
             t += 1
-            if (not greedy and self.training) or (greedy and memory is not None):
+            if (not greedy and self.training) or (greedy
+                                                  and memory is not None):
                 if t >= T_decoder:
                     break
             else:
-                if t > inputs.shape[1]/2 and stop_token > 0.8:
+                if t > inputs.shape[1] / 4 and stop_token > 0.6:
                     break
                 elif t > self.max_decoder_steps:
-                    print(" !! Decoder stopped with 'max_decoder_steps'. \
+                    print("   | > Decoder stopped with 'max_decoder_steps")
-                          Something is probably wrong.")
                     break
         assert greedy or len(outputs) == T_decoder
         # Back to batch first
-        alignments = torch.stack(alignments).transpose(0, 1)
+        attentions = torch.stack(attentions).transpose(0, 1)
         outputs = torch.stack(outputs).transpose(0, 1).contiguous()
         stop_tokens = torch.stack(stop_tokens).transpose(0, 1)
-        return outputs, alignments, stop_tokens
+        return outputs, attentions, stop_tokens
 
 
 class StopNet(nn.Module):
@@ -317,6 +405,13 @@ class StopNet(nn.Module):
     """
 
     def __init__(self, r, memory_dim):
+        r"""
+        Predicts the stop token to stop the decoder at testing time
+
+        Args:
+            r (int): number of network output frames.
+            memory_dim (int): single feature dim of a single network output frame.
+        """
         super(StopNet, self).__init__()
         self.rnn = nn.GRUCell(memory_dim * r, memory_dim * r)
         self.relu = nn.ReLU()

models/tacotron.py

@@ -2,33 +2,37 @@
 import torch
 from torch import nn
 from utils.text.symbols import symbols
-from layers.tacotron import Prenet, Encoder, Decoder, CBHG
+from layers.tacotron import Prenet, Encoder, Decoder, PostCBHG
 
 
 class Tacotron(nn.Module):
-    def __init__(self, embedding_dim=256, linear_dim=1025, mel_dim=80,
+    def __init__(self,
-                 r=5, padding_idx=None):
+                 embedding_dim=256,
+                 linear_dim=1025,
+                 mel_dim=80,
+                 r=5,
+                 padding_idx=None):
         super(Tacotron, self).__init__()
         self.r = r
         self.mel_dim = mel_dim
         self.linear_dim = linear_dim
-        self.embedding = nn.Embedding(len(symbols), embedding_dim,
+        self.embedding = nn.Embedding(
-                                      padding_idx=padding_idx)
+            len(symbols), embedding_dim, padding_idx=padding_idx)
         print(" | > Number of characters : {}".format(len(symbols)))
         self.embedding.weight.data.normal_(0, 0.3)
         self.encoder = Encoder(embedding_dim)
         self.decoder = Decoder(256, mel_dim, r)
-        self.postnet = CBHG(mel_dim, K=8, projections=[256, mel_dim])
+        self.postnet = PostCBHG(mel_dim)
-        self.last_linear = nn.Linear(mel_dim * 2, linear_dim)
+        self.last_linear = nn.Linear(self.postnet.cbhg.gru_features * 2, linear_dim)
 
-    def forward(self, characters, mel_specs=None):
+    def forward(self, characters, mel_specs=None, mask=None):
         B = characters.size(0)
         inputs = self.embedding(characters)
         # batch x time x dim
         encoder_outputs = self.encoder(inputs)
         # batch x time x dim*r
         mel_outputs, alignments, stop_tokens = self.decoder(
-            encoder_outputs, mel_specs)
+            encoder_outputs, mel_specs, mask)
         # Reshape
         # batch x time x dim
         mel_outputs = mel_outputs.view(B, -1, self.mel_dim)

notebooks/synthesis.py

@@ -40,8 +40,12 @@ def visualize(alignment, spectrogram, stop_tokens, CONFIG):
     plt.plot(range(len(stop_tokens)), list(stop_tokens))
 
     plt.subplot(3, 1, 3)
-    librosa.display.specshow(spectrogram.T, sr=CONFIG.sample_rate,
+    librosa.display.specshow(
-                             hop_length=hop_length, x_axis="time", y_axis="linear")
+        spectrogram.T,
+        sr=CONFIG.sample_rate,
+        hop_length=hop_length,
+        x_axis="time",
+        y_axis="linear")
     plt.xlabel("Time", fontsize=label_fontsize)
     plt.ylabel("Hz", fontsize=label_fontsize)
     plt.tight_layout()

requirements.txt

@@ -1,10 +1,12 @@
+numpy==1.14.3
+lws
 torch>=0.4.0
-librosa
+librosa==0.5.1
-inflect
+Unidecode==0.4.20
-unidecode
 tensorboard
 tensorboardX
-matplotlib
+matplotlib==2.0.2
 Pillow
 flask
-scipy
+scipy==0.19.0
+lws

server/README.md

@@ -1,9 +1,9 @@
 ## TTS example web-server
 Steps to run:
-1. Download one of the models given on the main page.
+1. Download one of the models given on the main page. Click [here](https://drive.google.com/drive/folders/1Q6BKeEkZyxSGsocK2p_mqgzLwlNvbHFJ?usp=sharing) for the lastest model.
-2. Checkout the corresponding commit history. 
+2. Checkout the corresponding commit history or use ```server``` branch if you like to use the latest model.
-2. Set paths and other options in the file ```server/conf.json```.
+2. Set the paths and the other options in the file ```server/conf.json```.
-3. Run the server ```python server/server.py -c conf.json```. (Requires Flask)
+3. Run the server ```python server/server.py -c server/conf.json```. (Requires Flask)
 4. Go to ```localhost:[given_port]``` and enjoy.
 
-Note that the audio quality on browser is slightly worse due to the encoder quantization. 
+For high quality results, please use the library versions shown in the ```requirements.txt``` file.

server/conf.json

@@ -1,5 +1,5 @@
 {
-    "model_path":"/home/erogol/projects/models/LJSpeech/May-22-2018_03_24PM-e6112f7",
+    "model_path":"../models/May-22-2018_03_24PM-e6112f7",
     "model_name":"checkpoint_272976.pth.tar",
     "model_config":"config.json",
     "port": 5002,

server/server.py

@@ -2,12 +2,11 @@
 import argparse
 from synthesizer import Synthesizer
 from TTS.utils.generic_utils import load_config
-from flask import (Flask, Response, request,
+from flask import Flask, Response, request, render_template, send_file
-                  render_template, send_file)
 
 parser = argparse.ArgumentParser()
-parser.add_argument('-c', '--config_path', type=str,
+parser.add_argument(
-                    help='path to config file for training')
+    '-c', '--config_path', type=str, help='path to config file for training')
 args = parser.parse_args()
 
 config = load_config(args.config_path)
@@ -16,17 +15,19 @@ synthesizer = Synthesizer()
 synthesizer.load_model(config.model_path, config.model_name,
                        config.model_config, config.use_cuda)
 
+
 @app.route('/')
 def index():
     return render_template('index.html')
 
+
 @app.route('/api/tts', methods=['GET'])
 def tts():
     text = request.args.get('text')
     print(" > Model input: {}".format(text))
     data = synthesizer.tts(text)
-    return send_file(data,  
+    return send_file(data, mimetype='audio/wav')
-                     mimetype='audio/wav')
+
 
 if __name__ == '__main__':
     app.run(debug=True, host='0.0.0.0', port=config.port)

server/synthesizer.py

@@ -13,7 +13,6 @@ from matplotlib import pylab as plt
 
 
 class Synthesizer(object):
-
     def load_model(self, model_path, model_name, model_config, use_cuda):
         model_config = os.path.join(model_path, model_config)
         self.model_file = os.path.join(model_path, model_name)
@@ -23,15 +22,25 @@ class Synthesizer(object):
         config = load_config(model_config)
         self.config = config
         self.use_cuda = use_cuda
-        self.model = Tacotron(config.embedding_size, config.num_freq, config.num_mels, config.r)
+        self.model = Tacotron(config.embedding_size, config.num_freq,
-        self.ap = AudioProcessor(config.sample_rate, config.num_mels, config.min_level_db,
+                              config.num_mels, config.r)
-                                 config.frame_shift_ms, config.frame_length_ms, config.preemphasis,
+        self.ap = AudioProcessor(
-                                 config.ref_level_db, config.num_freq, config.power, griffin_lim_iters=60)  
+            config.sample_rate,
+            config.num_mels,
+            config.min_level_db,
+            config.frame_shift_ms,
+            config.frame_length_ms,
+            config.preemphasis,
+            config.ref_level_db,
+            config.num_freq,
+            config.power,
+            griffin_lim_iters=60)
         # load model state
         if use_cuda:
             cp = torch.load(self.model_file)
         else:
-            cp = torch.load(self.model_file, map_location=lambda storage, loc: storage)
+            cp = torch.load(
+                self.model_file, map_location=lambda storage, loc: storage)
         # load the model
         self.model.load_state_dict(cp['model'])
         if use_cuda:
@@ -40,12 +49,8 @@ class Synthesizer(object):
 
     def save_wav(self, wav, path):
         wav *= 32767 / max(1e-8, np.max(np.abs(wav)))
-        # sf.write(path, wav.astype(np.int32), self.config.sample_rate, format='wav')
+        librosa.output.write_wav(path, wav.astype(np.int16),
-        # wav = librosa.util.normalize(wav.astype(np.float), norm=np.inf, axis=None)
+                                 self.config.sample_rate)
-        # wav = wav / wav.max()
-        # sf.write(path, wav.astype('float'), self.config.sample_rate, format='ogg')
-        scipy.io.wavfile.write(path, self.config.sample_rate, wav.astype(np.int16))
-        # librosa.output.write_wav(path, wav.astype(np.int16), self.config.sample_rate, norm=True)
 
     def tts(self, text):
         text_cleaner = [self.config.text_cleaner]
@@ -54,14 +59,15 @@ class Synthesizer(object):
             if len(sen) < 3:
                 continue
             sen = sen.strip()
-            sen +='.'
+            sen += '.'
             print(sen)
             sen = sen.strip()
             seq = np.array(text_to_sequence(text, text_cleaner))
-            chars_var = torch.from_numpy(seq).unsqueeze(0)
+            chars_var = torch.from_numpy(seq).unsqueeze(0).long()
             if self.use_cuda:
                 chars_var = chars_var.cuda()
-            mel_out, linear_out, alignments, stop_tokens = self.model.forward(chars_var)
+            mel_out, linear_out, alignments, stop_tokens = self.model.forward(
+                chars_var)
             linear_out = linear_out[0].data.cpu().numpy()
             wav = self.ap.inv_spectrogram(linear_out.T)
             # wav = wav[:self.ap.find_endpoint(wav)]

setup.py

@@ -25,7 +25,6 @@ else:
 
 
 class build_py(setuptools.command.build_py.build_py):
-
     def run(self):
         self.create_version_file()
         setuptools.command.build_py.build_py.run(self)
@@ -40,7 +39,6 @@ class build_py(setuptools.command.build_py.build_py):
 
 
 class develop(setuptools.command.develop.develop):
-
     def run(self):
         build_py.create_version_file()
         setuptools.command.develop.develop.run(self)
@@ -50,8 +48,11 @@ def create_readme_rst():
     global cwd
     try:
         subprocess.check_call(
-            ["pandoc", "--from=markdown", "--to=rst", "--output=README.rst",
+            [
-             "README.md"], cwd=cwd)
+                "pandoc", "--from=markdown", "--to=rst", "--output=README.rst",
+                "README.md"
+            ],
+            cwd=cwd)
         print("Generated README.rst from README.md using pandoc.")
     except subprocess.CalledProcessError:
         pass
@@ -59,30 +60,31 @@ def create_readme_rst():
         pass
 
 
-setup(name='TTS',
+setup(
-      version=version,
+    name='TTS',
-      url='https://github.com/mozilla/TTS',
+    version=version,
-      description='Text to Speech with Deep Learning',
+    url='https://github.com/mozilla/TTS',
-      packages=find_packages(),
+    description='Text to Speech with Deep Learning',
-      cmdclass={
+    packages=find_packages(),
-          'build_py': build_py,
+    cmdclass={
-          'develop': develop,
+        'build_py': build_py,
-      },
+        'develop': develop,
-      install_requires=[
+    },
-          "numpy",
+    setup_requires=["numpy==1.14.3"],
-          "scipy",
+    install_requires=[
-          "librosa",
+        "scipy==0.19.0",
-          "torch >= 0.4.0",
+        "torch == 0.4.0",
-          "unidecode",
+        "librosa==0.5.1",
-          "tensorboardX",
+        "unidecode==0.4.20",
-          "matplotlib",
+        "tensorboardX",
-          "Pillow",
+        "matplotlib==2.0.2",
-          "flask",
+        "Pillow",
-      ],
+        "flask",
-      extras_require={
+        "lws",
-          "bin": [
+    ],
-              "tqdm",
+    extras_require={
-              "tensorboardX",
+        "bin": [
-              "requests",
+            "tqdm",
-          ],
+            "requests",
-      })
+        ],
+    })

tests/generic_utils_text.py

@@ -8,19 +8,17 @@ OUT_PATH = '/tmp/test.pth.tar'
 
 
 class ModelSavingTests(unittest.TestCase):
-
     def save_checkpoint_test(self):
         # create a dummy model
         model = Prenet(128, out_features=[256, 128])
         model = T.nn.DataParallel(layer)
 
         # save the model
-        save_checkpoint(model, None, 100,
+        save_checkpoint(model, None, 100, OUTPATH, 1, 1)
-                        OUTPATH, 1, 1)
 
         # load the model to CPU
-        model_dict = torch.load(MODEL_PATH, map_location=lambda storage,
+        model_dict = torch.load(
-                                loc: storage)
+            MODEL_PATH, map_location=lambda storage, loc: storage)
         model.load_state_dict(model_dict['model'])
 
     def save_best_model_test(self):
@@ -29,11 +27,9 @@ class ModelSavingTests(unittest.TestCase):
         model = T.nn.DataParallel(layer)
 
         # save the model
-        best_loss = save_best_model(model, None, 0,
+        best_loss = save_best_model(model, None, 0, 100, OUT_PATH, 10, 1)
-                                    100, OUT_PATH,
-                                    10, 1)
 
         # load the model to CPU
-        model_dict = torch.load(MODEL_PATH, map_location=lambda storage,
+        model_dict = torch.load(
-                                loc: storage)
+            MODEL_PATH, map_location=lambda storage, loc: storage)
         model.load_state_dict(model_dict['model'])

tests/layers_tests.py

@@ -2,11 +2,11 @@ import unittest
 import torch as T
 
 from TTS.layers.tacotron import Prenet, CBHG, Decoder, Encoder
-from TTS.layers.losses import L1LossMasked, _sequence_mask
+from TTS.layers.losses import L1LossMasked
+from TTS.utils.generic_utils import sequence_mask
 
 
 class PrenetTests(unittest.TestCase):
-
     def test_in_out(self):
         layer = Prenet(128, out_features=[256, 128])
         dummy_input = T.rand(4, 128)
@@ -18,7 +18,6 @@ class PrenetTests(unittest.TestCase):
 
 
 class CBHGTests(unittest.TestCase):
-
     def test_in_out(self):
         layer = CBHG(128, K=6, projections=[128, 128], num_highways=2)
         dummy_input = T.rand(4, 8, 128)
@@ -31,7 +30,6 @@ class CBHGTests(unittest.TestCase):
 
 
 class DecoderTests(unittest.TestCase):
-
     def test_in_out(self):
         layer = Decoder(in_features=256, memory_dim=80, r=2)
         dummy_input = T.rand(4, 8, 256)
@@ -48,7 +46,6 @@ class DecoderTests(unittest.TestCase):
 
 
 class EncoderTests(unittest.TestCase):
-
     def test_in_out(self):
         layer = Encoder(128)
         dummy_input = T.rand(4, 8, 128)
@@ -62,7 +59,6 @@ class EncoderTests(unittest.TestCase):
 
 
 class L1LossMaskedTests(unittest.TestCase):
-
     def test_in_out(self):
         layer = L1LossMasked()
         dummy_input = T.ones(4, 8, 128).float()
@@ -79,7 +75,7 @@ class L1LossMaskedTests(unittest.TestCase):
         dummy_input = T.ones(4, 8, 128).float()
         dummy_target = T.zeros(4, 8, 128).float()
         dummy_length = (T.arange(5, 9)).long()
-        mask = ((_sequence_mask(dummy_length).float() - 1.0)
+        mask = (
-                * 100.0).unsqueeze(2)
+            (sequence_mask(dummy_length).float() - 1.0) * 100.0).unsqueeze(2)
         output = layer(dummy_input + mask, dummy_target, dummy_length)
         assert output.item() == 1.0, "1.0 vs {}".format(output.data[0])

tests/loader_tests.py

@@ -4,37 +4,46 @@ import numpy as np
 
 from torch.utils.data import DataLoader
 from TTS.utils.generic_utils import load_config
-from TTS.datasets.LJSpeech import LJSpeechDataset
+from TTS.utils.audio import AudioProcessor
+from TTS.datasets import LJSpeech, Kusal
 
 file_path = os.path.dirname(os.path.realpath(__file__))
 c = load_config(os.path.join(file_path, 'test_config.json'))
 
 
 class TestLJSpeechDataset(unittest.TestCase):
-
     def __init__(self, *args, **kwargs):
         super(TestLJSpeechDataset, self).__init__(*args, **kwargs)
         self.max_loader_iter = 4
+        self.ap = AudioProcessor(
+            sample_rate=c.sample_rate,
+            num_mels=c.num_mels,
+            min_level_db=c.min_level_db,
+            frame_shift_ms=c.frame_shift_ms,
+            frame_length_ms=c.frame_length_ms,
+            ref_level_db=c.ref_level_db,
+            num_freq=c.num_freq,
+            power=c.power,
+            preemphasis=c.preemphasis,
+            min_mel_freq=c.min_mel_freq,
+            max_mel_freq=c.max_mel_freq)
 
     def test_loader(self):
-        dataset = LJSpeechDataset(os.path.join(c.data_path_LJSpeech, 'metadata.csv'),
+        dataset = LJSpeech.MyDataset(
-                                  os.path.join(c.data_path_LJSpeech, 'wavs'),
+            os.path.join(c.data_path_LJSpeech),
-                                  c.r,
+            os.path.join(c.data_path_LJSpeech, 'metadata.csv'),
-                                  c.sample_rate,
+            c.r,
-                                  c.text_cleaner,
+            c.text_cleaner,
-                                  c.num_mels,
+            ap=self.ap,
-                                  c.min_level_db,
+            min_seq_len=c.min_seq_len)
-                                  c.frame_shift_ms,
-                                  c.frame_length_ms,
-                                  c.preemphasis,
-                                  c.ref_level_db,
-                                  c.num_freq,
-                                  c.power
-                                  )
 
-        dataloader = DataLoader(dataset, batch_size=2,
+        dataloader = DataLoader(
-                                shuffle=True, collate_fn=dataset.collate_fn,
+            dataset,
-                                drop_last=True, num_workers=c.num_loader_workers)
+            batch_size=2,
+            shuffle=True,
+            collate_fn=dataset.collate_fn,
+            drop_last=True,
+            num_workers=c.num_loader_workers)
 
         for i, data in enumerate(dataloader):
             if i == self.max_loader_iter:
@@ -57,25 +66,22 @@ class TestLJSpeechDataset(unittest.TestCase):
             assert mel_input.shape[2] == c.num_mels
 
     def test_padding(self):
-        dataset = LJSpeechDataset(os.path.join(c.data_path_LJSpeech, 'metadata.csv'),
+        dataset = LJSpeech.MyDataset(
-                                  os.path.join(c.data_path_LJSpeech, 'wavs'),
+            os.path.join(c.data_path_LJSpeech),
-                                  1,
+            os.path.join(c.data_path_LJSpeech, 'metadata.csv'),
-                                  c.sample_rate,
+            1,
-                                  c.text_cleaner,
+            c.text_cleaner,
-                                  c.num_mels,
+            ap=self.ap,
-                                  c.min_level_db,
+            min_seq_len=c.min_seq_len)
-                                  c.frame_shift_ms,
-                                  c.frame_length_ms,
-                                  c.preemphasis,
-                                  c.ref_level_db,
-                                  c.num_freq,
-                                  c.power
-                                  )
 
         # Test for batch size 1
-        dataloader = DataLoader(dataset, batch_size=1,
+        dataloader = DataLoader(
-                                shuffle=False, collate_fn=dataset.collate_fn,
+            dataset,
-                                drop_last=True, num_workers=c.num_loader_workers)
+            batch_size=1,
+            shuffle=False,
+            collate_fn=dataset.collate_fn,
+            drop_last=True,
+            num_workers=c.num_loader_workers)
 
         for i, data in enumerate(dataloader):
             if i == self.max_loader_iter:
@@ -100,9 +106,13 @@ class TestLJSpeechDataset(unittest.TestCase):
             assert mel_lengths[0] == mel_input[0].shape[0]
 
         # Test for batch size 2
-        dataloader = DataLoader(dataset, batch_size=2,
+        dataloader = DataLoader(
-                                shuffle=False, collate_fn=dataset.collate_fn,
+            dataset,
-                                drop_last=False, num_workers=c.num_loader_workers)
+            batch_size=2,
+            shuffle=False,
+            collate_fn=dataset.collate_fn,
+            drop_last=False,
+            num_workers=c.num_loader_workers)
 
         for i, data in enumerate(dataloader):
             if i == self.max_loader_iter:
@@ -132,9 +142,150 @@ class TestLJSpeechDataset(unittest.TestCase):
             assert mel_lengths[idx] == mel_input[idx].shape[0]
 
             # check the second itme in the batch
-            assert mel_input[1-idx, -1].sum() == 0
+            assert mel_input[1 - idx, -1].sum() == 0
-            assert linear_input[1-idx, -1].sum() == 0
+            assert linear_input[1 - idx, -1].sum() == 0
-            assert stop_target[1-idx, -1] == 1
+            assert stop_target[1 - idx, -1] == 1
+            assert len(mel_lengths.shape) == 1
+
+            # check batch conditions
+            assert (mel_input * stop_target.unsqueeze(2)).sum() == 0
+            assert (linear_input * stop_target.unsqueeze(2)).sum() == 0
+
+
+class TestKusalDataset(unittest.TestCase):
+    def __init__(self, *args, **kwargs):
+        super(TestKusalDataset, self).__init__(*args, **kwargs)
+        self.max_loader_iter = 4
+        self.ap = AudioProcessor(
+            sample_rate=c.sample_rate,
+            num_mels=c.num_mels,
+            min_level_db=c.min_level_db,
+            frame_shift_ms=c.frame_shift_ms,
+            frame_length_ms=c.frame_length_ms,
+            ref_level_db=c.ref_level_db,
+            num_freq=c.num_freq,
+            power=c.power,
+            preemphasis=c.preemphasis,
+            min_mel_freq=c.min_mel_freq,
+            max_mel_freq=c.max_mel_freq)
+
+    def test_loader(self):
+        dataset = Kusal.MyDataset(
+            os.path.join(c.data_path_Kusal),
+            os.path.join(c.data_path_Kusal, 'prompts.txt'),
+            c.r,
+            c.text_cleaner,
+            ap=self.ap,
+            min_seq_len=c.min_seq_len)
+
+        dataloader = DataLoader(
+            dataset,
+            batch_size=2,
+            shuffle=True,
+            collate_fn=dataset.collate_fn,
+            drop_last=True,
+            num_workers=c.num_loader_workers)
+
+        for i, data in enumerate(dataloader):
+            if i == self.max_loader_iter:
+                break
+            text_input = data[0]
+            text_lengths = data[1]
+            linear_input = data[2]
+            mel_input = data[3]
+            mel_lengths = data[4]
+            stop_target = data[5]
+            item_idx = data[6]
+
+            neg_values = text_input[text_input < 0]
+            check_count = len(neg_values)
+            assert check_count == 0, \
+                " !! Negative values in text_input: {}".format(check_count)
+            # TODO: more assertion here
+            assert linear_input.shape[0] == c.batch_size
+            assert mel_input.shape[0] == c.batch_size
+            assert mel_input.shape[2] == c.num_mels
+
+    def test_padding(self):
+        dataset = Kusal.MyDataset(
+            os.path.join(c.data_path_Kusal),
+            os.path.join(c.data_path_Kusal, 'prompts.txt'),
+            1,
+            c.text_cleaner,
+            ap=self.ap,
+            min_seq_len=c.min_seq_len)
+
+        # Test for batch size 1
+        dataloader = DataLoader(
+            dataset,
+            batch_size=1,
+            shuffle=False,
+            collate_fn=dataset.collate_fn,
+            drop_last=True,
+            num_workers=c.num_loader_workers)
+
+        for i, data in enumerate(dataloader):
+            if i == self.max_loader_iter:
+                break
+            text_input = data[0]
+            text_lengths = data[1]
+            linear_input = data[2]
+            mel_input = data[3]
+            mel_lengths = data[4]
+            stop_target = data[5]
+            item_idx = data[6]
+
+            # check the last time step to be zero padded
+            assert mel_input[0, -1].sum() == 0
+            # assert mel_input[0, -2].sum() != 0
+            assert linear_input[0, -1].sum() == 0
+            # assert linear_input[0, -2].sum() != 0
+            assert stop_target[0, -1] == 1
+            assert stop_target[0, -2] == 0
+            assert stop_target.sum() == 1
+            assert len(mel_lengths.shape) == 1
+            assert mel_lengths[0] == mel_input[0].shape[0]
+
+        # Test for batch size 2
+        dataloader = DataLoader(
+            dataset,
+            batch_size=2,
+            shuffle=False,
+            collate_fn=dataset.collate_fn,
+            drop_last=False,
+            num_workers=c.num_loader_workers)
+
+        for i, data in enumerate(dataloader):
+            if i == self.max_loader_iter:
+                break
+            text_input = data[0]
+            text_lengths = data[1]
+            linear_input = data[2]
+            mel_input = data[3]
+            mel_lengths = data[4]
+            stop_target = data[5]
+            item_idx = data[6]
+
+            if mel_lengths[0] > mel_lengths[1]:
+                idx = 0
+            else:
+                idx = 1
+
+            # check the first item in the batch
+            assert mel_input[idx, -1].sum() == 0
+            assert mel_input[idx, -2].sum() != 0, mel_input
+            assert linear_input[idx, -1].sum() == 0
+            assert linear_input[idx, -2].sum() != 0
+            assert stop_target[idx, -1] == 1
+            assert stop_target[idx, -2] == 0
+            assert stop_target[idx].sum() == 1
+            assert len(mel_lengths.shape) == 1
+            assert mel_lengths[idx] == mel_input[idx].shape[0]
+
+            # check the second itme in the batch
+            assert mel_input[1 - idx, -1].sum() == 0
+            assert linear_input[1 - idx, -1].sum() == 0
+            assert stop_target[1 - idx, -1] == 1
             assert len(mel_lengths.shape) == 1
 
             # check batch conditions

tests/tacotron_tests.py

@@ -19,50 +19,51 @@ c = load_config(os.path.join(file_path, 'test_config.json'))
 
 
 class TacotronTrainTest(unittest.TestCase):
-    
     def test_train_step(self):
         input = torch.randint(0, 24, (8, 128)).long().to(device)
         mel_spec = torch.rand(8, 30, c.num_mels).to(device)
         linear_spec = torch.rand(8, 30, c.num_freq).to(device)
-        mel_lengths = torch.randint(20, 30, (8,)).long().to(device)
+        mel_lengths = torch.randint(20, 30, (8, )).long().to(device)
         stop_targets = torch.zeros(8, 30, 1).float().to(device)
 
         for idx in mel_lengths:
             stop_targets[:, int(idx.item()):, 0] = 1.0
 
-        stop_targets = stop_targets.view(input.shape[0], stop_targets.size(1) // c.r, -1)
+        stop_targets = stop_targets.view(input.shape[0],
+                                         stop_targets.size(1) // c.r, -1)
         stop_targets = (stop_targets.sum(2) > 0.0).unsqueeze(2).float()
 
         criterion = L1LossMasked().to(device)
         criterion_st = nn.BCELoss().to(device)
-        model = Tacotron(c.embedding_size,
+        model = Tacotron(c.embedding_size, c.num_freq, c.num_mels,
-                         c.num_freq,
-                         c.num_mels,
                          c.r).to(device)
         model.train()
         model_ref = copy.deepcopy(model)
         count = 0
-        for param, param_ref in zip(model.parameters(), model_ref.parameters()):
+        for param, param_ref in zip(model.parameters(),
+                                    model_ref.parameters()):
             assert (param - param_ref).sum() == 0, param
             count += 1
         optimizer = optim.Adam(model.parameters(), lr=c.lr)
         for i in range(5):
-            mel_out, linear_out, align, stop_tokens = model.forward(input, mel_spec)
+            mel_out, linear_out, align, stop_tokens = model.forward(
+                input, mel_spec)
             assert stop_tokens.data.max() <= 1.0
             assert stop_tokens.data.min() >= 0.0
             optimizer.zero_grad()
             loss = criterion(mel_out, mel_spec, mel_lengths)
             stop_loss = criterion_st(stop_tokens, stop_targets)
-            loss = loss + criterion(linear_out, linear_spec, mel_lengths) + stop_loss
+            loss = loss + criterion(linear_out, linear_spec,
+                                    mel_lengths) + stop_loss
             loss.backward()
             optimizer.step()
         # check parameter changes
         count = 0
-        for param, param_ref in zip(model.parameters(), model_ref.parameters()):
+        for param, param_ref in zip(model.parameters(),
+                                    model_ref.parameters()):
             # ignore pre-higway layer since it works conditional
-            if count not in [145, 59]:
+            # if count not in [145, 59]:
-                assert (param != param_ref).any(), "param {} with shape {} not updated!! \n{}\n{}".format(count, param.shape, param, param_ref)
+            assert (param != param_ref).any(
+            ), "param {} with shape {} not updated!! \n{}\n{}".format(
+                count, param.shape, param, param_ref)
             count += 1
-            
-        
-        

tests/test_config.json

@@ -9,6 +9,8 @@
     "ref_level_db": 20,
     "hidden_size": 128,
     "embedding_size": 256,
+    "min_mel_freq": null,
+    "max_mel_freq": null,
     "text_cleaner": "english_cleaners",
 
     "epochs": 2000,
@@ -27,8 +29,9 @@
     "num_loader_workers": 4,
 
     "save_step": 200,
-    "data_path_LJSpeech": "/data/shared/KeithIto/LJSpeech-1.0",
+    "data_path_LJSpeech": "C:/Users/erogol/Data/LJSpeech-1.1",
-    "data_path_TWEB": "/data/shared/BibleSpeech",
+    "data_path_Kusal": "C:/Users/erogol/Data/Kusal",
     "output_path": "result",
+    "min_seq_len": 0,
     "log_dir": "/home/erogol/projects/TTS/logs/"
     }

train.py

@@ -1,67 +1,44 @@
 import os
 import sys
 import time
-import datetime
 import shutil
 import torch
-import signal
 import argparse
 import importlib
-import pickle
 import traceback
 import numpy as np
 
 import torch.nn as nn
 from torch import optim
-from torch import onnx
 from torch.utils.data import DataLoader
-from torch.optim.lr_scheduler import ReduceLROnPlateau
 from tensorboardX import SummaryWriter
 
-from utils.generic_utils import (Progbar, remove_experiment_folder,
+from utils.generic_utils import (
-                                 create_experiment_folder, save_checkpoint,
+    synthesis, remove_experiment_folder, create_experiment_folder,
-                                 save_best_model, load_config, lr_decay,
+    save_checkpoint, save_best_model, load_config, lr_decay, count_parameters,
-                                 count_parameters, check_update, get_commit_hash)
+    check_update, get_commit_hash, sequence_mask)
-from utils.model import get_param_size
 from utils.visual import plot_alignment, plot_spectrogram
-from datasets.LJSpeech import LJSpeechDataset
 from models.tacotron import Tacotron
 from layers.losses import L1LossMasked
+from utils.audio import AudioProcessor
+
 
 torch.manual_seed(1)
+torch.set_num_threads(4)
 use_cuda = torch.cuda.is_available()
 
-parser = argparse.ArgumentParser()
-parser.add_argument('--restore_path', type=str,
-                    help='Folder path to checkpoints', default=0)
-parser.add_argument('--config_path', type=str,
-                    help='path to config file for training',)
-parser.add_argument('--debug', type=bool, default=False,
-                    help='do not ask for git has before run.')
-args = parser.parse_args()
 
-# setup output paths and read configs
+def train(model, criterion, criterion_st, data_loader, optimizer, optimizer_st,
-c = load_config(args.config_path)
+          scheduler, ap, epoch):
-_ = os.path.dirname(os.path.realpath(__file__))
-OUT_PATH = os.path.join(_, c.output_path)
-OUT_PATH = create_experiment_folder(OUT_PATH, c.model_name, args.debug)
-CHECKPOINT_PATH = os.path.join(OUT_PATH, 'checkpoints')
-shutil.copyfile(args.config_path, os.path.join(OUT_PATH, 'config.json'))
-
-# setup tensorboard
-LOG_DIR = OUT_PATH
-tb = SummaryWriter(LOG_DIR)
-
-
-def train(model, criterion, criterion_st, data_loader, optimizer, optimizer_st, epoch):
     model = model.train()
     epoch_time = 0
     avg_linear_loss = 0
     avg_mel_loss = 0
     avg_stop_loss = 0
-    print(" | > Epoch {}/{}".format(epoch, c.epochs))
+    avg_step_time = 0
-    progbar = Progbar(len(data_loader.dataset) / c.batch_size)
+    print(" | > Epoch {}/{}".format(epoch, c.epochs), flush=True)
     n_priority_freq = int(3000 / (c.sample_rate * 0.5) * c.num_freq)
+    batch_n_iter = int(len(data_loader.dataset) / c.batch_size)
     for num_iter, data in enumerate(data_loader):
         start_time = time.time()
 
@@ -74,41 +51,38 @@ def train(model, criterion, criterion_st, data_loader, optimizer, optimizer_st,
         stop_targets = data[5]
 
         # set stop targets view, we predict a single stop token per r frames prediction
-        stop_targets = stop_targets.view(text_input.shape[0], stop_targets.size(1) // c.r, -1)
+        stop_targets = stop_targets.view(text_input.shape[0],
+                                         stop_targets.size(1) // c.r, -1)
         stop_targets = (stop_targets.sum(2) > 0.0).unsqueeze(2).float()
 
         current_step = num_iter + args.restore_step + \
             epoch * len(data_loader) + 1
 
         # setup lr
-        current_lr = lr_decay(c.lr, current_step, c.warmup_steps)
+        scheduler.step()
-        current_lr_st = lr_decay(c.lr, current_step, c.warmup_steps)
-
-        for params_group in optimizer.param_groups:
-            params_group['lr'] = current_lr
-
-        for params_group in optimizer_st.param_groups:
-            params_group['lr'] = current_lr_st
-
         optimizer.zero_grad()
         optimizer_st.zero_grad()
 
         # dispatch data to GPU
         if use_cuda:
             text_input = text_input.cuda()
+            text_lengths = text_lengths.cuda()
             mel_input = mel_input.cuda()
             mel_lengths = mel_lengths.cuda()
             linear_input = linear_input.cuda()
             stop_targets = stop_targets.cuda()
 
+        # compute mask for padding
+        mask = sequence_mask(text_lengths)
+
         # forward pass
-        mel_output, linear_output, alignments, stop_tokens =\
+        mel_output, linear_output, alignments, stop_tokens = torch.nn.parallel.data_parallel(
-            model.forward(text_input, mel_input)
+            model, (text_input, mel_input, mask))
 
         # loss computation
         stop_loss = criterion_st(stop_tokens, stop_targets)
         mel_loss = criterion(mel_output, mel_input, mel_lengths)
-        linear_loss = 0.5 * criterion(linear_output, linear_input, mel_lengths) \
+        linear_loss = 0.5 * criterion(linear_output, linear_input, mel_lengths)\
             + 0.5 * criterion(linear_output[:, :, :n_priority_freq],
                               linear_input[:, :, :n_priority_freq],
                               mel_lengths)
@@ -116,16 +90,16 @@ def train(model, criterion, criterion_st, data_loader, optimizer, optimizer_st,
 
         # backpass and check the grad norm for spec losses
         loss.backward(retain_graph=True)
-        grad_norm, skip_flag = check_update(model, 0.5, 100)
+        grad_norm, skip_flag = check_update(model, 1)
         if skip_flag:
             optimizer.zero_grad()
-            print(" | > Iteration skipped!!")
+            print(" | > Iteration skipped!!", flush=True)
             continue
         optimizer.step()
 
         # backpass and check the grad norm for stop loss
         stop_loss.backward()
-        grad_norm_st, skip_flag = check_update(model.module.decoder.stopnet, 0.5, 100)
+        grad_norm_st, skip_flag = check_update(model.decoder.stopnet, 0.5)
         if skip_flag:
             optimizer_st.zero_grad()
             print(" | | > Iteration skipped fro stopnet!!")
@@ -135,29 +109,20 @@ def train(model, criterion, criterion_st, data_loader, optimizer, optimizer_st,
         step_time = time.time() - start_time
         epoch_time += step_time
 
-        # update
-        # progbar.update(num_iter+1, values=[('total_loss', loss.item()),
-        #                                    ('linear_loss', linear_loss.item()),
-        #                                    ('mel_loss', mel_loss.item()),
-        #                                    ('stop_loss', stop_loss.item()),
-        #                                    ('grad_norm', grad_norm.item()),
-        #                                    ('grad_norm_st', grad_norm_st.item())])
-
         if current_step % c.print_step == 0:
-            print(" | | > Step:{}  GlobalStep:{}  TotalLoss:{:.5f}  LinearLoss:{:.5f}  "\
+            print(
-                  "MelLoss:{:.5f}  StopLoss:{:.5f}  GradNorm:{:.5f}  "\
+                " | | > Step:{}/{}  GlobalStep:{}  TotalLoss:{:.5f}  LinearLoss:{:.5f}  "
-                  "GradNormST:{:.5f}  StepTime:{:.2f}".format(num_iter, current_step,
+                "MelLoss:{:.5f}  StopLoss:{:.5f}  GradNorm:{:.5f}  "
-                                             loss.item(),
+                "GradNormST:{:.5f}  StepTime:{:.2f}".format(
-                                             linear_loss.item(),
+                    num_iter, batch_n_iter, current_step, loss.item(),
-                                             mel_loss.item(),
+                    linear_loss.item(), mel_loss.item(), stop_loss.item(),
-                                             stop_loss.item(),
+                    grad_norm.item(), grad_norm_st.item(), step_time),
-                                             grad_norm.item(),
+                flush=True)
-                                             grad_norm_st.item(),
-                                             step_time))
 
         avg_linear_loss += linear_loss.item()
         avg_mel_loss += mel_loss.item()
         avg_stop_loss += stop_loss.item()
+        avg_step_time += step_time
 
         # Plot Training Iter Stats
         tb.add_scalar('TrainIterLoss/TotalLoss', loss.item(), current_step)
@@ -173,50 +138,51 @@ def train(model, criterion, criterion_st, data_loader, optimizer, optimizer_st,
         if current_step % c.save_step == 0:
             if c.checkpoint:
                 # save model
-                save_checkpoint(model, optimizer, linear_loss.item(),
+                save_checkpoint(model, optimizer, optimizer_st,
-                                OUT_PATH, current_step, epoch)
+                                linear_loss.item(), OUT_PATH, current_step,
+                                epoch)
 
             # Diagnostic visualizations
             const_spec = linear_output[0].data.cpu().numpy()
             gt_spec = linear_input[0].data.cpu().numpy()
 
-            const_spec = plot_spectrogram(const_spec, data_loader.dataset.ap)
+            const_spec = plot_spectrogram(const_spec, ap)
-            gt_spec = plot_spectrogram(gt_spec, data_loader.dataset.ap)
+            gt_spec = plot_spectrogram(gt_spec, ap)
-            tb.add_image('Visual/Reconstruction', const_spec, current_step)
+            tb.add_figure('Visual/Reconstruction', const_spec, current_step)
-            tb.add_image('Visual/GroundTruth', gt_spec, current_step)
+            tb.add_figure('Visual/GroundTruth', gt_spec, current_step)
 
             align_img = alignments[0].data.cpu().numpy()
             align_img = plot_alignment(align_img)
-            tb.add_image('Visual/Alignment', align_img, current_step)
+            tb.add_figure('Visual/Alignment', align_img, current_step)
 
             # Sample audio
             audio_signal = linear_output[0].data.cpu().numpy()
-            data_loader.dataset.ap.griffin_lim_iters = 60
+            ap.griffin_lim_iters = 60
-            audio_signal = data_loader.dataset.ap.inv_spectrogram(
+            audio_signal = ap.inv_spectrogram(audio_signal.T)
-                audio_signal.T)
             try:
-                tb.add_audio('SampleAudio', audio_signal, current_step,
+                tb.add_audio(
-                             sample_rate=c.sample_rate)
+                    'SampleAudio',
+                    audio_signal,
+                    current_step,
+                    sample_rate=c.sample_rate)
             except:
-                # print("\n > Error at audio signal on TB!!")
-                # print(audio_signal.max())
-                # print(audio_signal.min())
                 pass
 
     avg_linear_loss /= (num_iter + 1)
     avg_mel_loss /= (num_iter + 1)
     avg_stop_loss /= (num_iter + 1)
     avg_total_loss = avg_mel_loss + avg_linear_loss + avg_stop_loss
+    avg_step_time /= (num_iter + 1)
 
     # print epoch stats
-    print(" | | > EPOCH END -- GlobalStep:{}  AvgTotalLoss:{:.5f}  "\
+    print(
-          "AvgLinearLoss:{:.5f}  AvgMelLoss:{:.5f}  "\
+        " | | > EPOCH END -- GlobalStep:{}  AvgTotalLoss:{:.5f}  "
-          "AvgStopLoss:{:.5f}  EpochTime:{:.2f}".format(current_step,
+        "AvgLinearLoss:{:.5f}  AvgMelLoss:{:.5f}  "
-                                                       avg_total_loss,
+        "AvgStopLoss:{:.5f}  EpochTime:{:.2f}  "
-                                                       avg_linear_loss,
+        "AvgStepTime:{:.2f}".format(current_step, avg_total_loss,
-                                                       avg_mel_loss,
+                                    avg_linear_loss, avg_mel_loss,
-                                                       avg_stop_loss,
+                                    avg_stop_loss, epoch_time, avg_step_time),
-                                                       epoch_time))
+        flush=True)
 
     # Plot Training Epoch Stats
     tb.add_scalar('TrainEpochLoss/TotalLoss', avg_total_loss, current_step)
@@ -229,161 +195,204 @@ def train(model, criterion, criterion_st, data_loader, optimizer, optimizer_st,
     return avg_linear_loss, current_step
 
 
-def evaluate(model, criterion, criterion_st, data_loader, current_step):
+def evaluate(model, criterion, criterion_st, data_loader, ap, current_step):
     model = model.eval()
     epoch_time = 0
     avg_linear_loss = 0
     avg_mel_loss = 0
     avg_stop_loss = 0
     print(" | > Validation")
-    # progbar = Progbar(len(data_loader.dataset) / c.batch_size)
+    test_sentences = [
+        "It took me quite a long time to develop a voice, and now that I have it I'm not going to be silent.",
+        "Be a voice, not an echo.",
+        "I'm sorry Dave. I'm afraid I can't do that.",
+        "This cake is great. It's so delicious and moist."
+    ]
     n_priority_freq = int(3000 / (c.sample_rate * 0.5) * c.num_freq)
     with torch.no_grad():
-        for num_iter, data in enumerate(data_loader):
+        if data_loader is not None:
-            start_time = time.time()
+            for num_iter, data in enumerate(data_loader):
+                start_time = time.time()
 
-            # setup input data
+                # setup input data
-            text_input = data[0]
+                text_input = data[0]
-            text_lengths = data[1]
+                text_lengths = data[1]
-            linear_input = data[2]
+                linear_input = data[2]
-            mel_input = data[3]
+                mel_input = data[3]
-            mel_lengths = data[4]
+                mel_lengths = data[4]
-            stop_targets = data[5]
+                stop_targets = data[5]
 
-            # set stop targets view, we predict a single stop token per r frames prediction
+                # set stop targets view, we predict a single stop token per r frames prediction
-            stop_targets = stop_targets.view(text_input.shape[0], stop_targets.size(1) // c.r, -1)
+                stop_targets = stop_targets.view(text_input.shape[0],
-            stop_targets = (stop_targets.sum(2) > 0.0).unsqueeze(2).float()
+                                                 stop_targets.size(1) // c.r,
+                                                 -1)
+                stop_targets = (stop_targets.sum(2) > 0.0).unsqueeze(2).float()
 
-            # dispatch data to GPU
+                # dispatch data to GPU
-            if use_cuda:
+                if use_cuda:
-                text_input = text_input.cuda()
+                    text_input = text_input.cuda()
-                mel_input = mel_input.cuda()
+                    mel_input = mel_input.cuda()
-                mel_lengths = mel_lengths.cuda()
+                    mel_lengths = mel_lengths.cuda()
-                linear_input = linear_input.cuda()
+                    linear_input = linear_input.cuda()
-                stop_targets = stop_targets.cuda()
+                    stop_targets = stop_targets.cuda()
 
-            # forward pass
+                # forward pass
-            mel_output, linear_output, alignments, stop_tokens =\
+                mel_output, linear_output, alignments, stop_tokens =\
-                model.forward(text_input, mel_input)
+                    model.forward(text_input, mel_input)
 
-            # loss computation
+                # loss computation
-            stop_loss = criterion_st(stop_tokens, stop_targets)
+                stop_loss = criterion_st(stop_tokens, stop_targets)
-            mel_loss = criterion(mel_output, mel_input, mel_lengths)
+                mel_loss = criterion(mel_output, mel_input, mel_lengths)
-            linear_loss = 0.5 * criterion(linear_output, linear_input, mel_lengths) \
+                linear_loss = 0.5 * criterion(linear_output, linear_input, mel_lengths) \
-                + 0.5 * criterion(linear_output[:, :, :n_priority_freq],
+                    + 0.5 * criterion(linear_output[:, :, :n_priority_freq],
-                                  linear_input[:, :, :n_priority_freq],
+                                    linear_input[:, :, :n_priority_freq],
-                                  mel_lengths)
+                                    mel_lengths)
-            loss = mel_loss + linear_loss + stop_loss
+                loss = mel_loss + linear_loss + stop_loss
 
-            step_time = time.time() - start_time
+                step_time = time.time() - start_time
-            epoch_time += step_time
+                epoch_time += step_time
 
-            # update
+                if num_iter % c.print_step == 0:
-            # progbar.update(num_iter+1, values=[('total_loss', loss.item()),
+                    print(
-            #                                    ('linear_loss', linear_loss.item()),
+                        " | | > TotalLoss: {:.5f}   LinearLoss: {:.5f}   MelLoss:{:.5f}  "
-            #                                    ('mel_loss', mel_loss.item()),
+                        "StopLoss: {:.5f}  ".format(loss.item(),
-            #                                    ('stop_loss', stop_loss.item())])
+                                                    linear_loss.item(),
-            if num_iter % c.print_step == 0:
+                                                    mel_loss.item(),
-                print(" | | > TotalLoss: {:.5f}   LinearLoss: {:.5f}   MelLoss:{:.5f}  "\
+                                                    stop_loss.item()),
-                      "StopLoss: {:.5f}  ".format(loss.item(),
+                        flush=True)
-                                                          linear_loss.item(),
-                                                          mel_loss.item(),
-                                                          stop_loss.item()))
 
-            avg_linear_loss += linear_loss.item()
+                avg_linear_loss += linear_loss.item()
-            avg_mel_loss += mel_loss.item()
+                avg_mel_loss += mel_loss.item()
-            avg_stop_loss += stop_loss.item()
+                avg_stop_loss += stop_loss.item()
 
-    # Diagnostic visualizations
+            # Diagnostic visualizations
-    idx = np.random.randint(mel_input.shape[0])
+            idx = np.random.randint(mel_input.shape[0])
-    const_spec = linear_output[idx].data.cpu().numpy()
+            const_spec = linear_output[idx].data.cpu().numpy()
-    gt_spec = linear_input[idx].data.cpu().numpy()
+            gt_spec = linear_input[idx].data.cpu().numpy()
-    align_img = alignments[idx].data.cpu().numpy()
+            align_img = alignments[idx].data.cpu().numpy()
 
-    const_spec = plot_spectrogram(const_spec, data_loader.dataset.ap)
+            const_spec = plot_spectrogram(const_spec, ap)
-    gt_spec = plot_spectrogram(gt_spec, data_loader.dataset.ap)
+            gt_spec = plot_spectrogram(gt_spec, ap)
-    align_img = plot_alignment(align_img)
+            align_img = plot_alignment(align_img)
 
-    tb.add_image('ValVisual/Reconstruction', const_spec, current_step)
+            tb.add_figure('ValVisual/Reconstruction', const_spec, current_step)
-    tb.add_image('ValVisual/GroundTruth', gt_spec, current_step)
+            tb.add_figure('ValVisual/GroundTruth', gt_spec, current_step)
-    tb.add_image('ValVisual/ValidationAlignment', align_img, current_step)
+            tb.add_figure('ValVisual/ValidationAlignment', align_img,
+                         current_step)
 
-    # Sample audio
+            # Sample audio
-    audio_signal = linear_output[idx].data.cpu().numpy()
+            audio_signal = linear_output[idx].data.cpu().numpy()
-    data_loader.dataset.ap.griffin_lim_iters = 60
+            ap.griffin_lim_iters = 60
-    audio_signal = data_loader.dataset.ap.inv_spectrogram(audio_signal.T)
+            audio_signal = ap.inv_spectrogram(audio_signal.T)
-    try:
+            try:
-        tb.add_audio('ValSampleAudio', audio_signal, current_step,
+                tb.add_audio(
-                     sample_rate=c.sample_rate)
+                    'ValSampleAudio',
-    except:
+                    audio_signal,
-        # print(" | > Error at audio signal on TB!!")
+                    current_step,
-        # print(audio_signal.max())
+                    sample_rate=c.sample_rate)
-        # print(audio_signal.min())
+            except:
-        pass
+                # sometimes audio signal is out of boundaries
+                pass
 
-    # compute average losses
+            # compute average losses
-    avg_linear_loss /= (num_iter + 1)
+            avg_linear_loss /= (num_iter + 1)
-    avg_mel_loss /= (num_iter + 1)
+            avg_mel_loss /= (num_iter + 1)
-    avg_stop_loss /= (num_iter + 1)
+            avg_stop_loss /= (num_iter + 1)
-    avg_total_loss = avg_mel_loss + avg_linear_loss + avg_stop_loss
+            avg_total_loss = avg_mel_loss + avg_linear_loss + avg_stop_loss
 
-    # Plot Learning Stats
+            # Plot Learning Stats
-    tb.add_scalar('ValEpochLoss/TotalLoss', avg_total_loss, current_step)
+            tb.add_scalar('ValEpochLoss/TotalLoss', avg_total_loss,
-    tb.add_scalar('ValEpochLoss/LinearLoss', avg_linear_loss, current_step)
+                          current_step)
-    tb.add_scalar('ValEpochLoss/MelLoss', avg_mel_loss, current_step)
+            tb.add_scalar('ValEpochLoss/LinearLoss', avg_linear_loss,
-    tb.add_scalar('ValEpochLoss/Stop_loss', avg_stop_loss, current_step)
+                          current_step)
+            tb.add_scalar('ValEpochLoss/MelLoss', avg_mel_loss, current_step)
+            tb.add_scalar('ValEpochLoss/Stop_loss', avg_stop_loss,
+                          current_step)
 
+    # test sentences
+    ap.griffin_lim_iters = 60
+    for idx, test_sentence in enumerate(test_sentences):
+        wav, linear_spec, alignments = synthesis(model, ap, test_sentence,
+                                                     use_cuda, c.text_cleaner)
+        try:
+            wav_name = 'TestSentences/{}'.format(idx)
+            tb.add_audio(
+                wav_name, wav, current_step, sample_rate=c.sample_rate)
+        except:
+            print(" !! Error as creating Test Sentence -", idx)
+            pass
+        align_img = alignments[0].data.cpu().numpy()
+        linear_spec = plot_spectrogram(linear_spec, ap)
+        align_img = plot_alignment(align_img)
+        tb.add_figure('TestSentences/{}_Spectrogram'.format(idx), linear_spec,
+                     current_step)
+        tb.add_figure('TestSentences/{}_Alignment'.format(idx), align_img,
+                     current_step)
     return avg_linear_loss
 
 
 def main(args):
+    dataset = importlib.import_module('datasets.' + c.dataset)
+    Dataset = getattr(dataset, 'MyDataset')
+    audio = importlib.import_module('utils.' + c.audio_processor)
+    AudioProcessor = getattr(audio, 'AudioProcessor')
+
+    print(" > LR scheduler: {} ", c.lr_scheduler)
+    try:
+        scheduler = importlib.import_module('torch.optim.lr_scheduler')
+        scheduler = getattr(scheduler, c.lr_scheduler)
+    except:
+        scheduler = importlib.import_module('utils.generic_utils')
+        scheduler = getattr(scheduler, c.lr_scheduler)
+
+    ap = AudioProcessor(
+        sample_rate=c.sample_rate,
+        num_mels=c.num_mels,
+        min_level_db=c.min_level_db,
+        frame_shift_ms=c.frame_shift_ms,
+        frame_length_ms=c.frame_length_ms,
+        ref_level_db=c.ref_level_db,
+        num_freq=c.num_freq,
+        power=c.power,
+        preemphasis=c.preemphasis,
+        min_mel_freq=c.min_mel_freq,
+        max_mel_freq=c.max_mel_freq)
 
     # Setup the dataset
-    train_dataset = LJSpeechDataset(os.path.join(c.data_path, 'metadata_train.csv'),
+    train_dataset = Dataset(
-                                    os.path.join(c.data_path, 'wavs'),
+        c.data_path,
-                                    c.r,
+        c.meta_file_train,
-                                    c.sample_rate,
+        c.r,
-                                    c.text_cleaner,
+        c.text_cleaner,
-                                    c.num_mels,
+        ap=ap,
-                                    c.min_level_db,
+        min_seq_len=c.min_seq_len)
-                                    c.frame_shift_ms,
-                                    c.frame_length_ms,
-                                    c.preemphasis,
-                                    c.ref_level_db,
-                                    c.num_freq,
-                                    c.power,
-                                    min_seq_len=c.min_seq_len
-                                    )
 
-    train_loader = DataLoader(train_dataset, batch_size=c.batch_size,
+    train_loader = DataLoader(
-                              shuffle=False, collate_fn=train_dataset.collate_fn,
+        train_dataset,
-                              drop_last=False, num_workers=c.num_loader_workers,
+        batch_size=c.batch_size,
-                              pin_memory=True)
+        shuffle=False,
+        collate_fn=train_dataset.collate_fn,
+        drop_last=False,
+        num_workers=c.num_loader_workers,
+        pin_memory=True)
 
-    val_dataset = LJSpeechDataset(os.path.join(c.data_path, 'metadata_val.csv'),
+    if c.run_eval:
-                                  os.path.join(c.data_path, 'wavs'),
+        val_dataset = Dataset(
-                                  c.r,
+            c.data_path, c.meta_file_val, c.r, c.text_cleaner, ap=ap)
-                                  c.sample_rate,
-                                  c.text_cleaner,
-                                  c.num_mels,
-                                  c.min_level_db,
-                                  c.frame_shift_ms,
-                                  c.frame_length_ms,
-                                  c.preemphasis,
-                                  c.ref_level_db,
-                                  c.num_freq,
-                                  c.power
-                                  )
 
-    val_loader = DataLoader(val_dataset, batch_size=c.eval_batch_size,
+        val_loader = DataLoader(
-                            shuffle=False, collate_fn=val_dataset.collate_fn,
+            val_dataset,
-                            drop_last=False, num_workers=4,
+            batch_size=c.eval_batch_size,
-                            pin_memory=True)
+            shuffle=False,
+            collate_fn=val_dataset.collate_fn,
+            drop_last=False,
+            num_workers=4,
+            pin_memory=True)
+    else:
+        val_loader = None
 
-    model = Tacotron(c.embedding_size,
+    model = Tacotron(c.embedding_size, ap.num_freq, c.num_mels, c.r)
-                     c.num_freq,
+    print(" | > Num output units : {}".format(ap.num_freq), flush=True)
-                     c.num_mels,
-                     c.r)
 
     optimizer = optim.Adam(model.parameters(), lr=c.lr)
     optimizer_st = optim.Adam(model.decoder.stopnet.parameters(), lr=c.lr)
@@ -394,29 +403,32 @@ def main(args):
     if args.restore_path:
         checkpoint = torch.load(args.restore_path)
         model.load_state_dict(checkpoint['model'])
-        optimizer = optim.Adam(model.parameters(), lr=c.lr)
+        if use_cuda:
+            model = model.cuda()
+            criterion.cuda()
+            criterion_st.cuda()
         optimizer.load_state_dict(checkpoint['optimizer'])
+        optimizer_st.load_state_dict(checkpoint['optimizer_st'])
         for state in optimizer.state.values():
             for k, v in state.items():
                 if torch.is_tensor(v):
                     state[k] = v.cuda()
-        print(" > Model restored from step %d" % checkpoint['step'])
+        print(
+            " > Model restored from step %d" % checkpoint['step'], flush=True)
         start_epoch = checkpoint['step'] // len(train_loader)
         best_loss = checkpoint['linear_loss']
-        start_epoch = 0
         args.restore_step = checkpoint['step']
-        optimizer_st = optim.Adam(model.decoder.stopnet.parameters(), lr=c.lr)
     else:
         args.restore_step = 0
-        print("\n > Starting a new training")
+        print("\n > Starting a new training", flush=True)
-
+        if use_cuda:
-    if use_cuda:
+            model = model.cuda()
-        model = nn.DataParallel(model.cuda())
+            criterion.cuda()
-        criterion.cuda()
+            criterion_st.cuda()
-        criterion_st.cuda()
 
+    scheduler = StepLR(optimizer, step_size=c.decay_step, gamma=c.lr_decay)
     num_params = count_parameters(model)
-    print(" | > Model has {} parameters".format(num_params))
+    print(" | > Model has {} parameters".format(num_params), flush=True)
 
     if not os.path.exists(CHECKPOINT_PATH):
         os.mkdir(CHECKPOINT_PATH)
@@ -425,16 +437,50 @@ def main(args):
         best_loss = float('inf')
 
     for epoch in range(0, c.epochs):
-        train_loss, current_step = train(
+        train_loss, current_step = train(model, criterion, criterion_st,
-            model, criterion, criterion_st, train_loader, optimizer, optimizer_st, epoch)
+                                         train_loader, optimizer, optimizer_st,
-        val_loss = evaluate(model, criterion, criterion_st, val_loader, current_step)
+                                         scheduler, ap, epoch)
-        print(" | > Train Loss: {:.5f}   Validation Loss: {:.5f}".format(train_loss, val_loss))
+        val_loss = evaluate(model, criterion, criterion_st, val_loader, ap,
-        best_loss = save_best_model(model, optimizer, val_loss,
+                            current_step)
-                                    best_loss, OUT_PATH,
+        print(
-                                    current_step, epoch)
+            " | > Train Loss: {:.5f}   Validation Loss: {:.5f}".format(
+                train_loss, val_loss),
+            flush=True)
+        best_loss = save_best_model(model, optimizer, train_loss, best_loss,
+                                    OUT_PATH, current_step, epoch)
 
 
 if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        '--restore_path',
+        type=str,
+        help='Folder path to checkpoints',
+        default=0)
+    parser.add_argument(
+        '--config_path',
+        type=str,
+        help='path to config file for training',
+    )
+    parser.add_argument(
+        '--debug',
+        type=bool,
+        default=False,
+        help='do not ask for git has before run.')
+    args = parser.parse_args()
+
+    # setup output paths and read configs
+    c = load_config(args.config_path)
+    _ = os.path.dirname(os.path.realpath(__file__))
+    OUT_PATH = os.path.join(_, c.output_path)
+    OUT_PATH = create_experiment_folder(OUT_PATH, c.model_name, args.debug)
+    CHECKPOINT_PATH = os.path.join(OUT_PATH, 'checkpoints')
+    shutil.copyfile(args.config_path, os.path.join(OUT_PATH, 'config.json'))
+
+    # setup tensorboard
+    LOG_DIR = OUT_PATH
+    tb = SummaryWriter(LOG_DIR)
+
     try:
         main(args)
     except KeyboardInterrupt:

utils/audio.py

@@ -9,24 +9,40 @@ _mel_basis = None
 
 
 class AudioProcessor(object):
-
+    def __init__(self,
-    def __init__(self, sample_rate, num_mels, min_level_db, frame_shift_ms,
+                 sample_rate,
-                 frame_length_ms, preemphasis, ref_level_db, num_freq, power,
+                 num_mels,
+                 min_level_db,
+                 frame_shift_ms,
+                 frame_length_ms,
+                 ref_level_db,
+                 num_freq,
+                 power,
+                 preemphasis,
+                 min_mel_freq,
+                 max_mel_freq,
                  griffin_lim_iters=None):
+
+        print(" > Setting up Audio Processor...")
         self.sample_rate = sample_rate
         self.num_mels = num_mels
         self.min_level_db = min_level_db
         self.frame_shift_ms = frame_shift_ms
         self.frame_length_ms = frame_length_ms
-        self.preemphasis = preemphasis
         self.ref_level_db = ref_level_db
         self.num_freq = num_freq
         self.power = power
+        self.preemphasis = preemphasis
+        self.min_mel_freq = min_mel_freq
+        self.max_mel_freq = max_mel_freq
         self.griffin_lim_iters = griffin_lim_iters
+        self.n_fft, self.hop_length, self.win_length = self._stft_parameters()
+        if preemphasis == 0:
+            print(" | > Preemphasis is deactive.")
 
     def save_wav(self, wav, path):
         wav *= 32767 / max(0.01, np.max(np.abs(wav)))
-        librosa.output.write_wav(path, wav.astype(np.float), self.sample_rate, norm=True)
+        librosa.output.write_wav(path, wav.astype(np.int16), self.sample_rate)
 
     def _linear_to_mel(self, spectrogram):
         global _mel_basis
@@ -36,7 +52,9 @@ class AudioProcessor(object):
 
     def _build_mel_basis(self, ):
         n_fft = (self.num_freq - 1) * 2
-        return librosa.filters.mel(self.sample_rate, n_fft, n_mels=self.num_mels)
+        return librosa.filters.mel(
+            self.sample_rate, n_fft, n_mels=self.num_mels)
+        #    fmin=self.min_mel_freq, fmax=self.max_mel_freq)
 
     def _normalize(self, S):
         return np.clip((S - self.min_level_db) / -self.min_level_db, 0, 1)
@@ -48,22 +66,32 @@ class AudioProcessor(object):
         n_fft = (self.num_freq - 1) * 2
         hop_length = int(self.frame_shift_ms / 1000.0 * self.sample_rate)
         win_length = int(self.frame_length_ms / 1000.0 * self.sample_rate)
+        print(" | > fft size: {}, hop length: {}, win length: {}".format(
+            n_fft, hop_length, win_length))
         return n_fft, hop_length, win_length
 
     def _amp_to_db(self, x):
-        return 20 * np.log10(np.maximum(1e-5, x))
+        min_level = np.exp(self.min_level_db / 20 * np.log(10))
+        return 20 * np.log10(np.maximum(min_level, x))
 
     def _db_to_amp(self, x):
         return np.power(10.0, x * 0.05)
 
     def apply_preemphasis(self, x):
+        if self.preemphasis == 0:
+            raise RuntimeError(" !! Preemphasis is applied with factor 0.0. ")
         return signal.lfilter([1, -self.preemphasis], [1], x)
 
     def apply_inv_preemphasis(self, x):
+        if self.preemphasis == 0:
+            raise RuntimeError(" !! Preemphasis is applied with factor 0.0. ")
         return signal.lfilter([1], [1, -self.preemphasis], x)
 
     def spectrogram(self, y):
-        D = self._stft(self.apply_preemphasis(y))
+        if self.preemphasis != 0:
+            D = self._stft(self.apply_preemphasis(y))
+        else:
+            D = self._stft(y)
         S = self._amp_to_db(np.abs(D)) - self.ref_level_db
         return self._normalize(S)
 
@@ -72,45 +100,47 @@ class AudioProcessor(object):
         S = self._denormalize(spectrogram)
         S = self._db_to_amp(S + self.ref_level_db)  # Convert back to linear
         # Reconstruct phase
-        return self.apply_inv_preemphasis(self._griffin_lim(S ** self.power))
+        if self.preemphasis != 0:
+            return self.apply_inv_preemphasis(self._griffin_lim(S**self.power))
+        else:
+            return self._griffin_lim(S**self.power)
 
-#     def _griffin_lim(self, S):
+    # def _griffin_lim(self, S):
-#         '''librosa implementation of Griffin-Lim
+    #     '''Applies Griffin-Lim's raw.
-#         Based on https://github.com/librosa/librosa/issues/434
+    #     '''
-#         '''
+    #     S_best = copy.deepcopy(S)
-#         angles = np.exp(2j * np.pi * np.random.rand(*S.shape))
+    #     for i in range(self.griffin_lim_iters):
-#         S_complex = np.abs(S).astype(np.complex)
+    #         S_t = self._istft(S_best)
-#         y = self._istft(S_complex * angles)
+    #         est = self._stft(S_t)
-#         for i in range(self.griffin_lim_iters):
+    #         phase = est / np.maximum(1e-8, np.abs(est))
-#             angles = np.exp(1j * np.angle(self._stft(y)))
+    #         S_best = S * phase
-#             y = self._istft(S_complex * angles)
+    #     S_t = self._istft(S_best)
-#         return y
+    #     y = np.real(S_t)
+    #     return y
 
     def _griffin_lim(self, S):
-        '''Applies Griffin-Lim's raw.
+        angles = np.exp(2j * np.pi * np.random.rand(*S.shape))
-        '''
+        S_complex = np.abs(S).astype(np.complex)
-        S_best = copy.deepcopy(S)
+        y = self._istft(S_complex * angles)
         for i in range(self.griffin_lim_iters):
-            S_t = self._istft(S_best)
+            angles = np.exp(1j * np.angle(self._stft(y)))
-            est = self._stft(S_t)
+            y = self._istft(S_complex * angles)
-            phase = est / np.maximum(1e-8, np.abs(est))
-            S_best = S * phase
-        S_t = self._istft(S_best)
-        y = np.real(S_t)
         return y
 
     def melspectrogram(self, y):
-        D = self._stft(self.apply_preemphasis(y))
+        if self.preemphasis != 0:
+            D = self._stft(self.apply_preemphasis(y))
+        else:
+            D = self._stft(y)
         S = self._amp_to_db(self._linear_to_mel(np.abs(D))) - self.ref_level_db
         return self._normalize(S)
 
     def _stft(self, y):
-        n_fft, hop_length, win_length = self._stft_parameters()
+        return librosa.stft(
-        return librosa.stft(y=y, n_fft=n_fft, hop_length=hop_length, win_length=win_length)
+            y=y, n_fft=self.n_fft, hop_length=self.hop_length, win_length=self.win_length)
 
     def _istft(self, y):
-        _, hop_length, win_length = self._stft_parameters()
+        return librosa.istft(y, hop_length=self.hop_length, win_length=self.win_length)
-        return librosa.istft(y, hop_length=hop_length, win_length=win_length, window='hann')
 
     def find_endpoint(self, wav, threshold_db=-40, min_silence_sec=0.8):
         window_length = int(self.sample_rate * min_silence_sec)

utils/audio_lws.py

@@ -0,0 +1,151 @@
+import os
+import sys
+import librosa
+import pickle
+import copy
+import numpy as np
+from scipy import signal
+import lws
+
+_mel_basis = None
+
+
+class AudioProcessor(object):
+    def __init__(
+            self,
+            sample_rate,
+            num_mels,
+            min_level_db,
+            frame_shift_ms,
+            frame_length_ms,
+            ref_level_db,
+            num_freq,
+            power,
+            preemphasis,
+            min_mel_freq,
+            max_mel_freq,
+            griffin_lim_iters=None,
+    ):
+        print(" > Setting up Audio Processor...")
+        self.sample_rate = sample_rate
+        self.num_mels = num_mels
+        self.min_level_db = min_level_db
+        self.frame_shift_ms = frame_shift_ms
+        self.frame_length_ms = frame_length_ms
+        self.ref_level_db = ref_level_db
+        self.num_freq = num_freq
+        self.power = power
+        self.min_mel_freq = min_mel_freq
+        self.max_mel_freq = max_mel_freq
+        self.griffin_lim_iters = griffin_lim_iters
+        self.preemphasis = preemphasis
+        self.n_fft, self.hop_length, self.win_length = self._stft_parameters()
+        if preemphasis == 0:
+            print(" | > Preemphasis is deactive.")
+
+    def save_wav(self, wav, path):
+        wav *= 32767 / max(0.01, np.max(np.abs(wav)))
+        librosa.output.write_wav(
+            path, wav.astype(np.int16), self.sample_rate)
+
+    def _stft_parameters(self, ):
+        n_fft = int((self.num_freq - 1) * 2)
+        hop_length = int(self.frame_shift_ms / 1000.0 * self.sample_rate)
+        win_length = int(self.frame_length_ms / 1000.0 * self.sample_rate)
+        if n_fft % hop_length != 0:
+            hop_length = n_fft / 8
+            print(" | > hop_length is set to default ({}).".format(hop_length))
+        if n_fft % win_length != 0:
+            win_length = n_fft / 2
+            print(" | > win_length is set to default ({}).".format(win_length))
+        print(" | > fft size: {}, hop length: {}, win length: {}".format(
+            n_fft, hop_length, win_length))
+        return int(n_fft), int(hop_length), int(win_length)
+
+    def _lws_processor(self):
+        try:
+            return lws.lws(
+                self.win_length,
+                self.hop_length,
+                fftsize=self.n_fft,
+                mode="speech")
+        except:
+            raise RuntimeError(
+                " !! WindowLength({}) is not multiple of HopLength({}).".
+                format(self.win_length, self.hop_length))
+
+    def _amp_to_db(self, x):
+        min_level = np.exp(self.min_level_db / 20 * np.log(10))
+        return 20 * np.log10(np.maximum(min_level, x))
+
+    def _db_to_amp(self, x):
+        return np.power(10.0, x * 0.05)
+
+    def _normalize(self, S):
+        return np.clip((S - self.min_level_db) / -self.min_level_db, 0, 1)
+
+    def _denormalize(self, S):
+        return (np.clip(S, 0, 1) * -self.min_level_db) + self.min_level_db
+
+    def apply_preemphasis(self, x):
+        if self.preemphasis == 0:
+            raise RuntimeError(" !! Preemphasis is applied with factor 0.0. ")
+        return signal.lfilter([1, -self.preemphasis], [1], x)
+
+    def apply_inv_preemphasis(self, x):
+        if self.preemphasis == 0:
+            raise RuntimeError(" !! Preemphasis is applied with factor 0.0. ")
+        return signal.lfilter([1], [1, -self.preemphasis], x)
+
+    def spectrogram(self, y):
+        f = open(os.devnull, 'w')
+        old_out = sys.stdout
+        sys.stdout = f
+        if self.preemphasis:
+            D = self._lws_processor().stft(self.apply_preemphasis(y)).T
+        else:
+            D = self._lws_processor().stft(y).T
+        S = self._amp_to_db(np.abs(D)) - self.ref_level_db
+        sys.stdout = old_out
+        return self._normalize(S)
+
+    def inv_spectrogram(self, spectrogram):
+        '''Converts spectrogram to waveform using librosa'''
+        f = open(os.devnull, 'w')
+        old_out = sys.stdout
+        sys.stdout = f
+        S = self._denormalize(spectrogram)
+        S = self._db_to_amp(S + self.ref_level_db)  # Convert back to linear
+        processor = self._lws_processor()
+        D = processor.run_lws(S.astype(np.float64).T**self.power)
+        y = processor.istft(D).astype(np.float32)
+        # Reconstruct phase
+        sys.stdout = old_out
+        if self.preemphasis:
+            return self.apply_inv_preemphasis(y)
+        return y
+
+    def _linear_to_mel(self, spectrogram):
+        global _mel_basis
+        if _mel_basis is None:
+            _mel_basis = self._build_mel_basis()
+        return np.dot(_mel_basis, spectrogram)
+
+    def _build_mel_basis(self, ):
+        return librosa.filters.mel(
+            self.sample_rate, self.n_fft, n_mels=self.num_mels)
+
+
+#                                    fmin=self.min_mel_freq, fmax=self.max_mel_freq)
+
+    def melspectrogram(self, y):
+        f = open(os.devnull, 'w')
+        old_out = sys.stdout
+        sys.stdout = f
+        if self.preemphasis:
+            D = self._lws_processor().stft(self.apply_preemphasis(y)).T
+        else:
+            D = self._lws_processor().stft(y).T
+        S = self._amp_to_db(self._linear_to_mel(np.abs(D))) - self.ref_level_db
+        sys.stdout = old_out
+        return self._normalize(S)

utils/data.py

@@ -4,9 +4,8 @@ import numpy as np
 def _pad_data(x, length):
     _pad = 0
     assert x.ndim == 1
-    return np.pad(x, (0, length - x.shape[0]),
+    return np.pad(
-                  mode='constant',
+        x, (0, length - x.shape[0]), mode='constant', constant_values=_pad)
-                  constant_values=_pad)
 
 
 def prepare_data(inputs):
@@ -17,8 +16,10 @@ def prepare_data(inputs):
 def _pad_tensor(x, length):
     _pad = 0
     assert x.ndim == 2
-    x = np.pad(x, [[0, 0], [0, length - x.shape[1]]],
+    x = np.pad(
-               mode='constant', constant_values=_pad)
+        x, [[0, 0], [0, length - x.shape[1]]],
+        mode='constant',
+        constant_values=_pad)
     return x
 
 
@@ -32,7 +33,8 @@ def prepare_tensor(inputs, out_steps):
 def _pad_stop_target(x, length):
     _pad = 1.
     assert x.ndim == 1
-    return np.pad(x, (0, length - x.shape[0]), mode='constant', constant_values=_pad)
+    return np.pad(
+        x, (0, length - x.shape[0]), mode='constant', constant_values=_pad)
 
 
 def prepare_stop_target(inputs, out_steps):
@@ -44,6 +46,7 @@ def prepare_stop_target(inputs, out_steps):
 
 def pad_per_step(inputs, pad_len):
     timesteps = inputs.shape[-1]
-    return np.pad(inputs, [[0, 0], [0, 0],
+    return np.pad(
-                           [0, pad_len]],
+        inputs, [[0, 0], [0, 0], [0, pad_len]],
-                  mode='constant', constant_values=0.0)
+        mode='constant',
+        constant_values=0.0)

utils/generic_utils.py

@@ -10,6 +10,7 @@ import subprocess
 import numpy as np
 from collections import OrderedDict
 from torch.autograd import Variable
+from utils.text import text_to_sequence
 
 
 class AttrDict(dict):
@@ -27,22 +28,26 @@ def load_config(config_path):
 def get_commit_hash():
     """https://stackoverflow.com/questions/14989858/get-the-current-git-hash-in-a-python-script"""
     try:
-        subprocess.check_output(['git', 'diff-index', '--quiet', 'HEAD'])   # Verify client is clean
+        subprocess.check_output(['git', 'diff-index', '--quiet',
+                                 'HEAD'])  # Verify client is clean
     except:
-        raise RuntimeError(" !! Commit before training to get the commit hash.")
+        raise RuntimeError(
-    commit = subprocess.check_output(['git', 'rev-parse', '--short', 'HEAD']).decode().strip()
+            " !! Commit before training to get the commit hash.")
+    commit = subprocess.check_output(['git', 'rev-parse', '--short',
+                                      'HEAD']).decode().strip()
     print(' > Git Hash: {}'.format(commit))
     return commit
 
 
 def create_experiment_folder(root_path, model_name, debug):
     """ Create a folder with the current date and time """
-    date_str = datetime.datetime.now().strftime("%B-%d-%Y_%I:%M%p")
+    date_str = datetime.datetime.now().strftime("%B-%d-%Y_%I+%M%p")
     if debug:
         commit_hash = 'debug'
     else:
         commit_hash = get_commit_hash()
-    output_folder = os.path.join(root_path, date_str + '-' + model_name + '-' + commit_hash)
+    output_folder = os.path.join(
+        root_path, date_str + '-' + model_name + '-' + commit_hash)
     os.makedirs(output_folder, exist_ok=True)
     print(" > Experiment folder: {}".format(output_folder))
     return output_folder
@@ -51,7 +56,7 @@ def create_experiment_folder(root_path, model_name, debug):
 def remove_experiment_folder(experiment_path):
     """Check folder if there is a checkpoint, otherwise remove the folder"""
 
-    checkpoint_files = glob.glob(experiment_path+"/*.pth.tar")
+    checkpoint_files = glob.glob(experiment_path + "/*.pth.tar")
     if len(checkpoint_files) < 1:
         if os.path.exists(experiment_path):
             shutil.rmtree(experiment_path)
@@ -78,32 +83,37 @@ def _trim_model_state_dict(state_dict):
     return new_state_dict
 
 
-def save_checkpoint(model, optimizer, model_loss, out_path,
+def save_checkpoint(model, optimizer, optimizer_st, model_loss, out_path,
                     current_step, epoch):
     checkpoint_path = 'checkpoint_{}.pth.tar'.format(current_step)
     checkpoint_path = os.path.join(out_path, checkpoint_path)
     print(" | | > Checkpoint saving : {}".format(checkpoint_path))
 
-    new_state_dict = _trim_model_state_dict(model.state_dict())
+    new_state_dict = model.state_dict()
-    state = {'model': new_state_dict,
+    state = {
-             'optimizer': optimizer.state_dict(),
+        'model': new_state_dict,
-             'step': current_step,
+        'optimizer': optimizer.state_dict(),
-             'epoch': epoch,
+        'optimizer_st': optimizer_st.state_dict(),
-             'linear_loss': model_loss,
+        'step': current_step,
-             'date': datetime.date.today().strftime("%B %d, %Y")}
+        'epoch': epoch,
+        'linear_loss': model_loss,
+        'date': datetime.date.today().strftime("%B %d, %Y")
+    }
     torch.save(state, checkpoint_path)
 
 
 def save_best_model(model, optimizer, model_loss, best_loss, out_path,
                     current_step, epoch):
     if model_loss < best_loss:
-        new_state_dict = _trim_model_state_dict(model.state_dict())
+        new_state_dict = model.state_dict()
-        state = {'model': new_state_dict,
+        state = {
-                 'optimizer': optimizer.state_dict(),
+            'model': new_state_dict,
-                 'step': current_step,
+            'optimizer': optimizer.state_dict(),
-                 'epoch': epoch,
+            'step': current_step,
-                 'linear_loss': model_loss,
+            'epoch': epoch,
-                 'date': datetime.date.today().strftime("%B %d, %Y")}
+            'linear_loss': model_loss,
+            'date': datetime.date.today().strftime("%B %d, %Y")
+        }
         best_loss = model_loss
         bestmodel_path = 'best_model.pth.tar'
         bestmodel_path = os.path.join(out_path, bestmodel_path)
@@ -113,16 +123,13 @@ def save_best_model(model, optimizer, model_loss, best_loss, out_path,
     return best_loss
 
 
-def check_update(model, grad_clip, grad_top):
+def check_update(model, grad_clip):
     r'''Check model gradient against unexpected jumps and failures'''
     skip_flag = False
     grad_norm = torch.nn.utils.clip_grad_norm_(model.parameters(), grad_clip)
     if np.isinf(grad_norm):
         print(" | > Gradient is INF !!")
         skip_flag = True
-    elif grad_norm > grad_top:
-        print(" | > Gradient is above the top limit !!")
-        skip_flag = True
     return grad_norm, skip_flag
 
 
@@ -135,19 +142,18 @@ def lr_decay(init_lr, global_step, warmup_steps):
     return lr
 
 
-def create_attn_mask(N, T, g=0.05):
+class AnnealLR(torch.optim.lr_scheduler._LRScheduler):
-    r'''creating attn mask for guided attention
+    def __init__(self, optimizer, warmup_steps=0.1):
-    TODO: vectorize'''
+        self.warmup_steps = float(warmup_steps)
-    M = np.zeros([N, T])
+        super(AnnealLR, self).__init__(optimizer, last_epoch)
-    for t in range(T):
+
-        for n in range(N):
+    def get_lr(self):
-            val = 20 * np.exp(-pow((n/N)-(t/T), 2.0)/g)
+        return [
-            M[n, t] = val
+            base_lr * self.warmup_steps**0.5 * torch.min([
-    e_x = np.exp(M - np.max(M))
+                self.last_epoch * self.warmup_steps**-1.5, self.last_epoch**
-    M = e_x / e_x.sum(axis=0) # only difference
+                -0.5
-    M = torch.FloatTensor(M).t().cuda()
+            ]) for base_lr in self.base_lrs
-    M = torch.stack([M]*32)
+        ]
-    return M
 
 
 def mk_decay(init_mk, max_epoch, n_epoch):
@@ -159,142 +165,27 @@ def count_parameters(model):
     return sum(p.numel() for p in model.parameters() if p.requires_grad)
 
 
-class Progbar(object):
+# from https://gist.github.com/jihunchoi/f1434a77df9db1bb337417854b398df1
-    """Displays a progress bar.
+def sequence_mask(sequence_length, max_len=None):
-    Args:
+    if max_len is None:
-        target: Total number of steps expected, None if unknown.
+        max_len = sequence_length.data.max()
-        interval: Minimum visual progress update interval (in seconds).
+    batch_size = sequence_length.size(0)
-    """
+    seq_range = torch.arange(0, max_len).long()
+    seq_range_expand = seq_range.unsqueeze(0).expand(batch_size, max_len)
+    if sequence_length.is_cuda:
+        seq_range_expand = seq_range_expand.cuda()
+    seq_length_expand = (sequence_length.unsqueeze(1)
+                         .expand_as(seq_range_expand))
+    return seq_range_expand < seq_length_expand
 
-    def __init__(self, target, width=30, verbose=1, interval=0.05):
-        self.width = width
-        self.target = target
-        self.sum_values = {}
-        self.unique_values = []
-        self.start = time.time()
-        self.last_update = 0
-        self.interval = interval
-        self.total_width = 0
-        self.seen_so_far = 0
-        self.verbose = verbose
-        self._dynamic_display = ((hasattr(sys.stdout, 'isatty') and
-                                  sys.stdout.isatty()) or
-                                 'ipykernel' in sys.modules)
 
-    def update(self, current, values=None, force=False):
+def synthesis(model, ap, text, use_cuda, text_cleaner):
-        """Updates the progress bar.
+    text_cleaner = [text_cleaner]
-        # Arguments
+    seq = np.array(text_to_sequence(text, text_cleaner))
-            current: Index of current step.
+    chars_var = torch.from_numpy(seq).unsqueeze(0)
-            values: List of tuples (name, value_for_last_step).
+    if use_cuda:
-                The progress bar will display averages for these values.
+        chars_var = chars_var.cuda().long()
-            force: Whether to force visual progress update.
+    _, linear_out, alignments, _ = model.forward(chars_var)
-        """
+    linear_out = linear_out[0].data.cpu().numpy()
-        values = values or []
+    wav = ap.inv_spectrogram(linear_out.T)
-        for k, v in values:
+    return wav, linear_out, alignments
-            if k not in self.sum_values:
-                self.sum_values[k] = [v * (current - self.seen_so_far),
-                                      current - self.seen_so_far]
-                self.unique_values.append(k)
-            else:
-                self.sum_values[k][0] += v * (current - self.seen_so_far)
-                self.sum_values[k][1] += (current - self.seen_so_far)
-        self.seen_so_far = current
-
-        now = time.time()
-        info = ' - %.0fs' % (now - self.start)
-        if self.verbose == 1:
-            if (not force and (now - self.last_update) < self.interval and
-                    self.target is not None and current < self.target):
-                return
-
-            prev_total_width = self.total_width
-            if self._dynamic_display:
-                sys.stdout.write('\b' * prev_total_width)
-                sys.stdout.write('\r')
-            else:
-                sys.stdout.write('\n')
-
-            if self.target is not None:
-                numdigits = int(np.floor(np.log10(self.target))) + 1
-                barstr = '%%%dd/%d [' % (numdigits, self.target)
-                bar = barstr % current
-                prog = float(current) / self.target
-                prog_width = int(self.width * prog)
-                if prog_width > 0:
-                    bar += ('=' * (prog_width - 1))
-                    if current < self.target:
-                        bar += '>'
-                    else:
-                        bar += '='
-                bar += ('.' * (self.width - prog_width))
-                bar += ']'
-            else:
-                bar = '%7d/Unknown' % current
-
-            self.total_width = len(bar)
-            sys.stdout.write(bar)
-
-            if current:
-                time_per_unit = (now - self.start) / current
-            else:
-                time_per_unit = 0
-            if self.target is not None and current < self.target:
-                eta = time_per_unit * (self.target - current)
-                if eta > 3600:
-                    eta_format = '%d:%02d:%02d' % (
-                        eta // 3600, (eta % 3600) // 60, eta % 60)
-                elif eta > 60:
-                    eta_format = '%d:%02d' % (eta // 60, eta % 60)
-                else:
-                    eta_format = '%ds' % eta
-
-                info = ' - ETA: %s' % eta_format
-
-            if time_per_unit >= 1:
-                info += ' %.0fs/step' % time_per_unit
-            elif time_per_unit >= 1e-3:
-                info += ' %.0fms/step' % (time_per_unit * 1e3)
-            else:
-                info += ' %.0fus/step' % (time_per_unit * 1e6)
-
-            for k in self.unique_values:
-                info += ' - %s:' % k
-                if isinstance(self.sum_values[k], list):
-                    avg = np.mean(
-                        self.sum_values[k][0] / max(1, self.sum_values[k][1]))
-                    if abs(avg) > 1e-3:
-                        info += ' %.4f' % avg
-                    else:
-                        info += ' %.4e' % avg
-                else:
-                    info += ' %s' % self.sum_values[k]
-
-            self.total_width += len(info)
-            if prev_total_width > self.total_width:
-                info += (' ' * (prev_total_width - self.total_width))
-
-            if self.target is not None and current >= self.target:
-                info += '\n'
-
-            sys.stdout.write(info)
-            sys.stdout.flush()
-
-        elif self.verbose == 2:
-            if self.target is None or current >= self.target:
-                for k in self.unique_values:
-                    info += ' - %s:' % k
-                    avg = np.mean(
-                        self.sum_values[k][0] / max(1, self.sum_values[k][1]))
-                    if avg > 1e-3:
-                        info += ' %.4f' % avg
-                    else:
-                        info += ' %.4e' % avg
-                info += '\n'
-
-                sys.stdout.write(info)
-                sys.stdout.flush()
-
-        self.last_update = now
-
-    def add(self, n, values=None):
-        self.update(self.seen_so_far + n, values)

utils/model.py

@@ -1,9 +0,0 @@
-
-def get_param_size(model):
-    params = 0
-    for p in model.parameters():
-        tmp = 1
-        for x in p.size():
-            tmp *= x
-        params += tmp
-    return params

utils/text/__init__.py

@@ -4,7 +4,6 @@ import re
 from utils.text import cleaners
 from utils.text.symbols import symbols
 
-
 # Mappings from symbol to numeric ID and vice versa:
 _symbol_to_id = {s: i for i, s in enumerate(symbols)}
 _id_to_symbol = {i: s for i, s in enumerate(symbols)}

utils/text/cleaners.py

@@ -14,31 +14,31 @@ import re
 from unidecode import unidecode
 from .numbers import normalize_numbers
 
-
 # Regular expression matching whitespace:
 _whitespace_re = re.compile(r'\s+')
 
 # List of (regular expression, replacement) pairs for abbreviations:
-_abbreviations = [(re.compile('\\b%s\\.' % x[0], re.IGNORECASE), x[1]) for x in [
+_abbreviations = [(re.compile('\\b%s\\.' % x[0], re.IGNORECASE), x[1])
-    ('mrs', 'misess'),
+                  for x in [
-    ('mr', 'mister'),
+                      ('mrs', 'misess'),
-    ('dr', 'doctor'),
+                      ('mr', 'mister'),
-    ('st', 'saint'),
+                      ('dr', 'doctor'),
-    ('co', 'company'),
+                      ('st', 'saint'),
-    ('jr', 'junior'),
+                      ('co', 'company'),
-    ('maj', 'major'),
+                      ('jr', 'junior'),
-    ('gen', 'general'),
+                      ('maj', 'major'),
-    ('drs', 'doctors'),
+                      ('gen', 'general'),
-    ('rev', 'reverend'),
+                      ('drs', 'doctors'),
-    ('lt', 'lieutenant'),
+                      ('rev', 'reverend'),
-    ('hon', 'honorable'),
+                      ('lt', 'lieutenant'),
-    ('sgt', 'sergeant'),
+                      ('hon', 'honorable'),
-    ('capt', 'captain'),
+                      ('sgt', 'sergeant'),
-    ('esq', 'esquire'),
+                      ('capt', 'captain'),
-    ('ltd', 'limited'),
+                      ('esq', 'esquire'),
-    ('col', 'colonel'),
+                      ('ltd', 'limited'),
-    ('ft', 'fort'),
+                      ('col', 'colonel'),
-]]
+                      ('ft', 'fort'),
+                  ]]
 
 
 def expand_abbreviations(text):

utils/text/cmudict.py

@@ -1,17 +1,16 @@
 # -*- coding: utf-8 -*-
 
-
 import re
 
-
 valid_symbols = [
-    'AA', 'AA0', 'AA1', 'AA2', 'AE', 'AE0', 'AE1', 'AE2', 'AH', 'AH0', 'AH1', 'AH2',
+    'AA', 'AA0', 'AA1', 'AA2', 'AE', 'AE0', 'AE1', 'AE2', 'AH', 'AH0', 'AH1',
-    'AO', 'AO0', 'AO1', 'AO2', 'AW', 'AW0', 'AW1', 'AW2', 'AY', 'AY0', 'AY1', 'AY2',
+    'AH2', 'AO', 'AO0', 'AO1', 'AO2', 'AW', 'AW0', 'AW1', 'AW2', 'AY', 'AY0',
-    'B', 'CH', 'D', 'DH', 'EH', 'EH0', 'EH1', 'EH2', 'ER', 'ER0', 'ER1', 'ER2', 'EY',
+    'AY1', 'AY2', 'B', 'CH', 'D', 'DH', 'EH', 'EH0', 'EH1', 'EH2', 'ER', 'ER0',
-    'EY0', 'EY1', 'EY2', 'F', 'G', 'HH', 'IH', 'IH0', 'IH1', 'IH2', 'IY', 'IY0', 'IY1',
+    'ER1', 'ER2', 'EY', 'EY0', 'EY1', 'EY2', 'F', 'G', 'HH', 'IH', 'IH0',
-    'IY2', 'JH', 'K', 'L', 'M', 'N', 'NG', 'OW', 'OW0', 'OW1', 'OW2', 'OY', 'OY0',
+    'IH1', 'IH2', 'IY', 'IY0', 'IY1', 'IY2', 'JH', 'K', 'L', 'M', 'N', 'NG',
-    'OY1', 'OY2', 'P', 'R', 'S', 'SH', 'T', 'TH', 'UH', 'UH0', 'UH1', 'UH2', 'UW',
+    'OW', 'OW0', 'OW1', 'OW2', 'OY', 'OY0', 'OY1', 'OY2', 'P', 'R', 'S', 'SH',
-    'UW0', 'UW1', 'UW2', 'V', 'W', 'Y', 'Z', 'ZH'
+    'T', 'TH', 'UH', 'UH0', 'UH1', 'UH2', 'UW', 'UW0', 'UW1', 'UW2', 'V', 'W',
+    'Y', 'Z', 'ZH'
 ]
 
 _valid_symbol_set = set(valid_symbols)
@@ -27,8 +26,10 @@ class CMUDict:
         else:
             entries = _parse_cmudict(file_or_path)
         if not keep_ambiguous:
-            entries = {word: pron for word,
+            entries = {
-                       pron in entries.items() if len(pron) == 1}
+                word: pron
+                for word, pron in entries.items() if len(pron) == 1
+            }
         self._entries = entries
 
     def __len__(self):

utils/text/numbers.py

@@ -8,61 +8,45 @@ _ordinal_re = re.compile(r'([0-9]+)(st|nd|rd|th)')
 _number_re = re.compile(r'[0-9]+')
 
 _units = [
-  '',
+    '', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine',
-  'one',
+    'ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen',
-  'two',
+    'seventeen', 'eighteen', 'nineteen'
-  'three',
-  'four',
-  'five',
-  'six',
-  'seven',
-  'eight',
-  'nine',
-  'ten',
-  'eleven',
-  'twelve',
-  'thirteen',
-  'fourteen',
-  'fifteen',
-  'sixteen',
-  'seventeen',
-  'eighteen',
-  'nineteen'
 ]
 
 _tens = [
-  '',
+    '',
-  'ten',
+    'ten',
-  'twenty',
+    'twenty',
-  'thirty',
+    'thirty',
-  'forty',
+    'forty',
-  'fifty',
+    'fifty',
-  'sixty',
+    'sixty',
-  'seventy',
+    'seventy',
-  'eighty',
+    'eighty',
-  'ninety',
+    'ninety',
 ]
 
 _digit_groups = [
-  '',
+    '',
-  'thousand',
+    'thousand',
-  'million',
+    'million',
-  'billion',
+    'billion',
-  'trillion',
+    'trillion',
-  'quadrillion',
+    'quadrillion',
 ]
 
 _ordinal_suffixes = [
-  ('one', 'first'),
+    ('one', 'first'),
-  ('two', 'second'),
+    ('two', 'second'),
-  ('three', 'third'),
+    ('three', 'third'),
-  ('five', 'fifth'),
+    ('five', 'fifth'),
-  ('eight', 'eighth'),
+    ('eight', 'eighth'),
-  ('nine', 'ninth'),
+    ('nine', 'ninth'),
-  ('twelve', 'twelfth'),
+    ('twelve', 'twelfth'),
-  ('ty', 'tieth'),
+    ('ty', 'tieth'),
 ]
 
+
 def _remove_commas(m):
     return m.group(1).replace(',', '')
 
@@ -114,7 +98,7 @@ def _standard_number_to_words(n, digit_group):
 def _number_to_words(n):
     # Handle special cases first, then go to the standard case:
     if n >= 1000000000000000000:
-        return str(n)   # Too large, just return the digits
+        return str(n)  # Too large, just return the digits
     elif n == 0:
         return 'zero'
     elif n % 100 == 0 and n % 1000 != 0 and n < 3000:

utils/text/symbols.py

@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-
-
 '''
 Defines the set of symbols used in text input to the model.
 
@@ -19,6 +17,5 @@ _arpabet = ['@' + s for s in cmudict.valid_symbols]
 # Export all symbols:
 symbols = [_pad, _eos] + list(_characters) + _arpabet
 
-
 if __name__ == '__main__':
     print(symbols)

utils/visual.py

@@ -6,8 +6,8 @@ import matplotlib.pyplot as plt
 
 def plot_alignment(alignment, info=None):
     fig, ax = plt.subplots(figsize=(16, 10))
-    im = ax.imshow(alignment.T, aspect='auto', origin='lower',
+    im = ax.imshow(
-                   interpolation='none')
+        alignment.T, aspect='auto', origin='lower', interpolation='none')
     fig.colorbar(im, ax=ax)
     xlabel = 'Decoder timestep'
     if info is not None:
@@ -15,11 +15,7 @@ def plot_alignment(alignment, info=None):
     plt.xlabel(xlabel)
     plt.ylabel('Encoder timestep')
     plt.tight_layout()
-    fig.canvas.draw()
+    return fig
-    data = np.fromstring(fig.canvas.tostring_rgb(), dtype=np.uint8, sep='')
-    data = data.reshape(fig.canvas.get_width_height()[::-1] + (3,))
-    plt.close()
-    return data
 
 
 def plot_spectrogram(linear_output, audio):
@@ -28,8 +24,4 @@ def plot_spectrogram(linear_output, audio):
     plt.imshow(spectrogram.T, aspect="auto", origin="lower")
     plt.colorbar()
     plt.tight_layout()
-    fig.canvas.draw()
+    return fig
-    data = np.fromstring(fig.canvas.tostring_rgb(), dtype=np.uint8, sep='')
-    data = data.reshape(fig.canvas.get_width_height()[::-1] + (3,))
-    plt.close()
-    return data