right, thanks.
it sounds like it's not possible to introduce mp3 rhythm loops into the looper -- the way I read the manual, you either start with the onboard rhythms or build from scratch using a drum kit.
it would be great to import a drum loop (made on a PSR or whatever) and then add to that by layering via the looper....
you can do it easily with a Roland BK9
[video:youtube]
https://www.youtube.com/watch?v=d3s5CLM_vcg#t=61[/video]