I’ve use it a bit - I forked out for some minutes and still have loads left as I tend to forget about it.
It’s great when it works, and you get something really useful. And you will. But you will also get a lot of unusable results, and ti will be time not making music…
Pros and cons. You just reminded me it exists though, and I have been feeling like I need some fresh drums in my life, so I might have a session later to see if I can get some clean drums going!
Lalal.ai definitely does a cleaner job than Koala… less artifacts/bleed. But it is totally a matter of if you need it at all, and what the specific per job need is. If you want clean drums in a sparse track where inperfections will stand out, then it might be no use. But a lot of imperfections probably won’t be noticeable in the full mix
I also tried Stemroller, that someone from the DnB battle used. I tried it and didn’t get anything, but the program kicked on the fan of my M1 MacBook Pro for the first time.
When I last looked into this (6 months ago maybe?) Facebook’s Demucs algorithm was far superior to Spleeter or what was in RX - much cleaner results. It wouldn’t surprise me if most of the paid tools use this under the hood, perhaps with their own tweaks on top (previously they all used Spleeter, as the actual algorithm is free and open source).
There is a GUI tool you could try to run it on your computer, assuming it is powerful enough (may not be the case!) - I’ve not tried it, I just used the Python package: https://github.com/Anjok07/ultimatevocalremovergui
$40 doesn’t seem like a bad deal for something web based which takes the hassle away though! There did used to be a free link to run Demucs via a webpage but I can’t find it now.
I think it is this https://musicprism.app though it doesnt seem to be working at the moment. This looks very promising though (if a bit slow) https://mvsep.com - allows a choice of algorithms
You should definitely try Demucs - I’m not sure if Spleeter has since advanced but when Demucs came out it sounded so much clearer and less artefacty than Spleeter
I’ve just run a bunch of ropey old demos through a few of the online DEMUCs services and what came out was surprisingly good (in technical terms, not musically…)