does twitch let you like, stream multiple different audio channels? surely that'd be a thing by now, right? a track with music for the main stream and one without for the VOD, internationalized commentary for big events, and i'm sure there's plenty of other uses people could come up with. if you allowed people to tune into multiple audio channels you could even have one for game, one commentary, one music, and then viewers could just pick and choose what they wanted...