I did an attempt of my own on Mathilda Mother from Stockholm 67.
It's a little bit of a 'quick and dirty' thing, so there is room at the top.
I extracted the vocals from the original stereo mix, but I didn't do it on that karaoke site.
I used professional software instead, so it is lossless.
The best algorithm for extracting the vocals seems still to be found or a different source might be used (mono mix?).
Anyway, I did it with Reaper, doing some sync work, EQing the vocal track to make it sound worse than it came out of separation.
The charming thing about these old live recordings is that the vocals sound rather bad in most cases, although the overall some quality might be vcery nice (Proof: have a listen to Man/Journey from Amsterdam).
I used that as a template, and so I purposely made them a bit lo-fi and buried in the mix to make them sound more authentic.
Here's the link:
https://wetransfer.com/downloads/53f...8215632/7e372b
The link is valid until 2021-08-04.
Opinions would be welcome...