How to use other Vocoder to synthesis waveform?

[ymzlygw]

Hi, I want to use other vocoder such as paddlepaddle's waveflow vocoder to synthesis waveform from mel-spec.
But I get some problems:
I see in your repo's audio.py , it use linear-spec rather than mel-spec to synthesis waveform and it confused me.
Also I try to extract mel-spec from train.py and try use it in paddlepaddle's waveflow, but I get the sizemismatch.
Can I change the output mel-spec size? or Should I also use linear-spec?