use soundfile for faster read

dataset_analysis/AnalyzeDataset.ipynb

@@ -753,7 +753,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.7.2"
   }
  },
  "nbformat": 4,

setup.py

@@ -83,6 +83,7 @@ setup(
         # "lws",
         "tqdm",
         "phonemizer",
+        "soundfile",
     ],
     dependency_links=[
         'http://github.com/bootphon/phonemizer/tarball/master#egg=phonemizer'

utils/audio.py

@@ -1,5 +1,6 @@
 import os
 import librosa
+import soundfile as sf
 import pickle
 import copy
 import numpy as np
@@ -230,7 +231,7 @@ class AudioProcessor(object):
     #     return np.sign(signal) * magnitude
 
     def load_wav(self, filename, encode=False):
-        x, sr = librosa.load(filename, sr=self.sample_rate)
+        x, sr = sf.read(filename)
         if self.do_trim_silence:
             x = self.trim_silence(x)
         # sr, x = io.wavfile.read(filename)