[Bug]: LJSpeech & LibriTTS - audio_pipeline error

[anautsch]

Describe the bug

While testing recipes, _get_spec_norms threw an error. I remember since I ran the tests last time, some of it might have been fixed already in #1740 for LJSpeech but the issue might still be up for LibriTTS.

Expected behaviour

No error

To Reproduce

No response

Versions

No response

Relevant log output

File "speechbrain/recipes/LibriTTS/vocoder/hifigan/train.py", line 330, in audio_pipeline
    mel = hparams["mel_spectogram"](audio=audio.squeeze(0))
...
  File "torchaudio/transforms/_transforms.py", line 108, in forward
    return F.spectrogram(
  File "torchaudio/functional/functional.py", line 114, in spectrogram
    frame_length_norm, window_norm = _get_spec_norms(normalized)
  File "torchaudio/functional/functional.py", line 239, in _get_spec_norms
    raise TypeError("Input type not supported")
TypeError: Input type not supported

Additional context

No response

[Adel-Moumen]

Hello @BenoitWang,

Could you please take a look? Many thanks :-)