Anttiryt,

There are “backing tracks” offered for sale everywhere. Google is your friend.
One example:
Aebersold
https://www.jazzbooks.com/mm5/mercha...ry_code=AEBPLA

You can mute any iRp instrument during playback for your own “music minus one” track.
https://technimo.helpshift.com/hc/en...trument/?p=all

Anyone is already allowed to use iReal pro tracks however they like (as long as they credit iReal pro)
https://www.irealb.com/forums/showth...YouTube-videos

https://www.irealb.com/forums/showth...backing-tracks

We feel that musicians and music consumers are responsible for the music that they choose to play and listen to.

There are many musical styles and a wide range of sophistication and complexity to suit individual taste and preference. I find “crowd-sourced” ratings often vary considerably from my own opinions.

The only difficult part is how verify quality of the backing track.
That’s the easy part. Use your ears and apply the “sucks….doesn’t suck” evaluation scale.

“Popular” does NOT equal “quality”

Thanks for sharing your idea.
)BOB