audio duration changed after analysis-synthesis

[wincing2]

The result of analysis-synthesis is a longer speech audio. Is there something wrong here? The code prepend a 0.5s silence before the analysis, but the resulting audio is NOT 0.5s longer than the source audio. For example, this file is 7.34s in duration, but the systhesized one is 8.04s.

There is an error message, which I'm not sure if it has something to the change in duration:

Error(s) in loading state_dict for StagedVQVAE:
Unexpected key(s) in state_dict: "mel_spectrogram.mel_stft.mel_scale.fb", "mel_spectrogram.mel_stft.spectrogram.window"

[hhguo]

Thanks for your attention,

1. You may ignore this error by setting strict=False when loading the checkpoint. The code will initialize the window parameters.
2. We empirically given a prepended silence since we noticed it can improve the tokenizer performance. Besides, we also append silence for the long frameshift of 120ms.