Hello,

As of right now, if you train your TTS with certain sample rate, you can't use it with a pertained vocoder trained on an other sampling rate. (It's true with other audio parameters like hop_size).

As proven by this colab notebook, by simply interpolating the mel-spectrogram to the right size, we can use the pertained vocoder regardless of the sample rate it was initially trained on.

Now we have to see what changes are necessary to make this work in mozilla/TTS