You can separate a track into up to five separate stems: vocal, piano, drums, bass, and 'other.' If you just want an instrumental separated from vocals, there's a two-stem model that does that, too. However, that's not all Spleeter can do, and it's an amazingly powerful tool. Spleeter has been around for years, and as somebody who has occasionally dabbled in music production, it's been great for creating bootleg remixes of songs by separating the vocal track from the instrumentation.