What would you be able to do with such files, Rock-it Rabbit? There are multiple uses:

1. It's a level to play for yourself and you want nice music to play while playing it. Solution: turn off jj2's music and open up your mp3 player program. Less work than converting it.
2. You like it and want to share it with others along with your level. You'd perhaps even like to upload it to Jazz2Online. Solution: none. Noone will accept a 5 mb zip file for one 5kb level, and the level will be too big to upload to the site.