I don't have the time to make many backing tracks these days, but I still got ya covered
Stemroller is an app that separates an mp3 into bass, drums, vocals, other stems. It uses an AI called Demucs(developed by Facebook) and works really well. If you don't have the mp3, you can search in the app and it will pull the mp3 from YouTube. Check it out...
www.stemroller.com
Warning! Separating mp3s into stems takes quite a bit of cpu. A song can take from 15 min to an hour, depending on your specs. I usually just queue a bunch of songs and leave it overnight.
If your computer is too old, it may not be able to handle this process. If that's the case, try this site. You can upload your mp3 and the processing is done on the server side. Just be sure to choose Demucs 3 (Model B) as the separation type.

Stemroller is an app that separates an mp3 into bass, drums, vocals, other stems. It uses an AI called Demucs(developed by Facebook) and works really well. If you don't have the mp3, you can search in the app and it will pull the mp3 from YouTube. Check it out...

StemRoller - Make stems, instrumental, or acapella version of any song!
StemRoller isolates instruments and vocals from any song using advanced AI and machine learning techniques. Make karaoke (instrumental), vocal, drum, and bass tracks from any recording in one click!

Warning! Separating mp3s into stems takes quite a bit of cpu. A song can take from 15 min to an hour, depending on your specs. I usually just queue a bunch of songs and leave it overnight.
If your computer is too old, it may not be able to handle this process. If that's the case, try this site. You can upload your mp3 and the processing is done on the server side. Just be sure to choose Demucs 3 (Model B) as the separation type.