[atoav]

As someone who uses source separation twice a week for mixing purposes the number of other instruments that can produce sounds of "vocal" quality is high. These models all stop functiining well when you have bands where the instruments don't sound typical and aren't played and/or mixed in a way that achieves maximum separation between them — e.g. an electrical guitar with a distorted harmonic hitting the same note as your singer while the drummer plays only shrieking noises on their cymbals and the bass player simulates a punching kick drum on their instrument.

In these situations (experimental music) source separation will produce completely unpredictable results, thst may or may not be useful for musical rebalancing.

[fnordlord]

What tool do you use for the source separation? Everything I've used so far is great for learning or transcribing to MIDI but the separated tracks always have a strange phasing sound to them. Are you doing something to clean that up before mixing back in or are the results already good enough?

[atoav]

iZotope RX with musical rebalance, great to reduce drum spill from vocal mics