Bug: Incorrect handling of sampling rate of input file

[CorgiMan]

I change the stemgen file so that I can convert mp3 files. When doing so I found out that the stems created are sped up due to the sample rate of my input mp3 being higher than 44100. (I'm surprised that it doesn't cause a slowdown instead tbh).

Not sure if other formats have the same issue so didn't want to put up a pull request before figuring that out.

Solution for me was quite simple: Convert files with ffmped with -ar 44100 flag to convert the input file correctly.

[axeldelafosse]

Had the same issue with .opus files with a sample rate of 48,000 Hz. Fixed with 3bdf45e. Thank you!

I don't recommend using .mp3 though so it is still "unsupported".