I've noticed a sync problem in m4l with the groove~ object. It's easy to reproduce if you record the output of groove~ into a live track. After a while (>3min) it gets totally out of sync and after a 20 minutes the loop will be displaced for more then 1 beat.
Steps to reproduce:
- load the attached test file into live
- record the output into a track for more then 3 minutes
- compare first bars of the file with the last bars