I'd like to put in a request that we be able to alter the volume of lead vocals and backing vocals separately at different points in the song so that we can correct errors made by the AI identification. Often, it'll get 95% of the song right, but then have one really notable exception where a foreground vocal is marked as a background vocal and being able to silence the 'backing vocal' track for just that 5 second interval would perfect it. As of right now, it's all or nothing. The volume of the backing vocals and lead vocals have to be identical for the entirety of the song, limiting any editing of the AI's work. Similarly, some vocals misidentified as foreground could be corrected if we could adjust volume of 'lead vocals' at different points in the song.