Deezer's Spleeter is an open source AI tool to split stems, for remixes or ... karaoke? - CDM Create Digital Music

The real power of machine learning may have nothing to with automating music making, and everything to do with making sound tools hear the way you do. While not a broadly known topic, the problem of source separation has interested a large community of music signal researchers for a couple of decades now. Wait a second – sure, you may not call it "source separation," but anyone who has tried to make remixes, or adapt a song for karaoke sing-alongs, or even just lost the separate tracks to a project has encountered and thought about this problem. You can hear the difference between the bassline and the singer – so why can't your computer process the sound the way you hear? Splitting stems out of a stereo audio feed also demonstrates that tools like EQ, filters, and multiband compressors are woefully inadequate to the task.