Upload feature extractor

feature_extraction_gramt_ambisonics.py

@@ -177,6 +177,7 @@ class AmbisonicsFeatureExtractor(SequenceFeatureExtractor):
         if waveform.shape[0] == 1:
             waveform = torch.cat([waveform, waveform, waveform, waveform], dim = 0).unsqueeze(0)
             log_mel = melspec(waveform).transpose(3, 2)[0]
+            return log_mel
         elif waveform.shape[0] == 2:
             waveform = waveform[0]
             waveform = torch.cat([waveform, waveform, waveform, waveform], dim = 0).unsqueeze(0)