Adding 'Voice stem removal'

[cvrle77]

It's long stretch to ask you for it, but its awesome feature, so it's worth trying.

Voice stem removal: Removing old voice from audio, leaving ambient noise intact, and mixing with generated voice.
So it's like dubbing movies, while all SFX are intact.

This 'stem removal' feature is available in Davinci Resolve Studio 19, in Fruity Loops, some VST plugins have it and ofc, github has it. https://github.com/adefossez/demucs

There's also a list of currently available stem removers in description at that address.