It's something that streamers themselves have to do, and most don't. If the streamer doesn't separate out the audio from their mic vs the background music, then there is nothing that Twitch or anybody else can do. Separating two audio tracks that have been flattened into one (and then compressed to hell) is like trying to unmix paint.
Comments
Would there be a reason that Twitch doesn't use such software?
It's something that streamers themselves have to do, and most don't. If the streamer doesn't separate out the audio from their mic vs the background music, then there is nothing that Twitch or anybody else can do. Separating two audio tracks that have been flattened into one (and then compressed to hell) is like trying to unmix paint.
Thanks for the hint. I found this:
Twitch VOD Track – Exclude Music from your Twitch VODs
https://www.youtube.com/watch?v=ZwnD3tjhPO4