Audio Source Separation that works reasonably well finally has arrive.
https://www.lalal.ai/ lets you extract vocal, accompaniment and various instruments from any audio file. It works amazingly well. It's a game changer for sample-based music production. There is an open source alternative as well: https://www.deezer-techservices.com/solutions/spleeter/ - https://github.com/charzy/Demucs-v4-