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Neural Mix Pro is another app that does this very effectively. Made by Algoriddim and designed primarily for DJ's as an accompaniment to their DJ Pro software. it is able to separate vocals, drums and instruments, live and on the fly. There is a standalone version available that I've been using. It's not perfect. Like noise removal and reverb removal tools, there are audible artefacts, but it is still pretty impressive when you think about what it is actually doing. Isolating the three main elements of a stereo mix as if you were listening to the original multitrack. Going through some of my favourite records is a revelation, listening to the drums, instruments and vocals on their own. It will be interesting to see how it compares to LALAL.AI Unfortunately non of their videos seem to show any examples.

Steve wrote:

Unfortunately non of their videos seem to show any examples.

As the article states, there are examples on the site that one can listen to, or, better yet, upload your own track to try it out. You can split three tracks for free. So… just try it and find out?

I have Neural Mix Pro too - it's a slick app but, as you mentioned, there are still residual artifacts in its processing - however it does a fairly good job in separating the vocal, instrumental and percussion into virtual "stems." I played around with LALA.AI yesterday and I think it has a more robust algorithm for separating the voice and instrumental tracks. This is purely subjective on my part after just a little testing but the vocals seemed a little more discreet and the instrumental track slightly more dynamic to my ears. YMMV. LALA.AI is a subscription service and Neural MIX Pro is an MacApp store purchase. Both are useful.

There’s also app for the iphone / iPad called Transcribe + that will unmix tracks you own ( not drm ) to voice/bass/drums/instruments... or various combinations. Stems can be exported as compressed or uncompressed audio. $12 for the app ... unmix til you drop.

It also does vari-speed playback if you’d like.

The results are very impressive ...

I used this the very day your article was posted to the ProFCP editors group on FB. Client had contacted a folk singer who gave permission to use her songs. Of course, they were 'songs'!
What I needed was music to back a very narration-heavy 3 min video application for a grant.
I and my post audio 'department' are blown away by the quality of LALAL.ai
I am almost embarrassed that it was done for free!
vimeo.com/522545934