diff --git a/TTS/bin/extract_tts_spectrograms.py b/TTS/bin/extract_tts_spectrograms.py
index 517a281e..1a77e45a 100755
--- a/TTS/bin/extract_tts_spectrograms.py
+++ b/TTS/bin/extract_tts_spectrograms.py
@@ -124,6 +124,49 @@ def format_data(data):
     )
 
 @torch.no_grad()
+def inference(model_name, model, ap, text_input, text_lengths, mel_input, mel_lengths, attn_mask=None, speaker_ids=None, speaker_embeddings=None):
+    if model_name == "glow_tts":
+        mel_input = mel_input.permute(0, 2, 1) # B x D x T
+        speaker_c = None
+        if speaker_ids is not None:
+            speaker_c = speaker_ids
+        elif speaker_embeddings is not None:
+            speaker_c = speaker_embeddings
+
+        model_output, _, _, _, _, _, _ = model.inference_with_MAS(
+            text_input, text_lengths, mel_input, mel_lengths, attn_mask, g=speaker_c
+        )
+        model_output = model_output.transpose(1, 2).detach().cpu().numpy()
+
+    elif "tacotron" in model_name:
+        if c.bidirectional_decoder or c.double_decoder_consistency:
+            (
+                _,
+                postnet_outputs,
+                _,
+                _,
+                _,
+                _,
+            ) = model(
+                text_input, text_lengths, mel_input, mel_lengths, speaker_ids=speaker_ids, speaker_embeddings=speaker_embeddings
+            )
+        else:
+            _, postnet_outputs, _, _ = model(
+                text_input, text_lengths, mel_input, mel_lengths, speaker_ids=speaker_ids, speaker_embeddings=speaker_embeddings
+            )
+        # normalize tacotron output
+        if model_name == "tacotron":
+            mel_specs = []
+            postnet_outputs = postnet_outputs.data.cpu().numpy()
+            for b in range(postnet_outputs.shape[0]):
+                postnet_output = postnet_outputs[b]
+                mel_specs.append(torch.FloatTensor(ap.out_linear_to_mel(postnet_output.T).T).cuda())
+            model_output = torch.stack(mel_specs)
+
+        elif model_name == "tacotron2":
+            model_output = postnet_outputs.detach().cpu().numpy()
+    return model_output
+
 def extract_spectrograms(data_loader, model, ap, output_path, quantized_wav=False, save_audio=False, debug=False, metada_name="metada.txt"):
     model.eval()
     export_metadata = []
@@ -143,46 +186,7 @@ def extract_spectrograms(data_loader, model, ap, output_path, quantized_wav=Fals
             item_idx,
         ) = format_data(data)
 
-        if c.model.lower() == "glow_tts":
-            mel_input = mel_input.permute(0, 2, 1)  # B x D x T
-            speaker_c = None
-            if speaker_ids is not None:
-                speaker_c = speaker_ids
-            elif speaker_embeddings is not None:
-                speaker_c = speaker_embeddings
-
-            model_output, _, _, _, _, _, _ = model.inference_with_MAS(
-                text_input, text_lengths, mel_input, mel_lengths, attn_mask, g=speaker_c
-            )
-            model_output = model_output.transpose(1, 2).detach().cpu().numpy()
-
-        elif "tacotron" in c.model.lower():
-            if c.bidirectional_decoder or c.double_decoder_consistency:
-                (
-                    _,
-                    postnet_outputs,
-                    _,
-                    _,
-                    _,
-                    _,
-                ) = model(
-                    text_input, text_lengths, mel_input, mel_lengths, speaker_ids=speaker_ids, speaker_embeddings=speaker_embeddings
-                )
-            else:
-                _, postnet_outputs, _, _ = model(
-                    text_input, text_lengths, mel_input, mel_lengths, speaker_ids=speaker_ids, speaker_embeddings=speaker_embeddings
-                )
-            # normalize tacotron output
-            if c.model.lower() == "tacotron":
-                mel_specs = []
-                postnet_outputs = postnet_outputs.data.cpu().numpy()
-                for b in range(postnet_outputs.shape[0]):
-                    postnet_output = postnet_outputs[b]
-                    mel_specs.append(torch.FloatTensor(ap.out_linear_to_mel(postnet_output.T).T).cuda())
-                model_output = torch.stack(mel_specs)
-
-            elif c.model.lower() == "tacotron2":
-                model_output = postnet_outputs.detach().cpu().numpy()
+        model_output = inference(c.model.lower(), model, ap, text_input, text_lengths, mel_input, mel_lengths, attn_mask, speaker_ids, speaker_embeddings)
 
         for idx in range(text_input.shape[0]):
             wav_file_path = item_idx[idx]