So, I used Cakewalk in DOS.. I find it irritating Sonar doesn't do VST3, but if you've ever been a plug developer, It's what made stienberg famous.. It's also in a sense what helped protools sell, cause everybody traded those plugins.. Now, on to the separation, I actually put it in awhile back for a feature, so you can blame me if you want.. It's so much faster then running demucs, and when you put them back together, you see FAR less difference if you mess with the tracks.
Now, this being said, as I've had the capability for a few years, one can absolutely use youtube as the legal guard.
Not to advertise but, on https://www.youtube.com/@oxyosbourne
I've been mostly just pitch increasing the vocals... HOWEVER,
There are few ways to get it to not see the copyright violation, that being said, one should consider, it's using the same type of sine-wave-plotting magic to pick out a copywrite violation from the stereo mix..
Also, if you use a microphone or say play the vinyl version sometimes it doesn't get it.
And also, the RipX daw just uses demucs underneath the hood, so if you can yt-dlp a something, ffmpeg it to wav and then run demucs you have that.
BUT, WAIT!!
Bandlab ponied up to do it for people for FREE.
Here's the thing, the learning part, hearing stairway with no guitar, hearing words from epic rock songs cause you can hear vocal messups when it solo's the stuff, you've never hear, It's an adventure for any audio-olo-something gist.. Pick your favorite song folk, listening to randy rhoads guitar only on a ozzy song.
So, yee-haw!