@sdesign - I’ve found it syncs with Boom 909 quite well too. But check again! Although they sound to be playing in time, the drift is still definitely there. Again, running it alongside something external which is running at the same tempo and Cubasis is still speeding up when using loop points. So even when apps appear to sync, they’re just syncing to Cusasis’s broken MIDI clock and managing to keep up. It’s as though it’s missing out a tiny part of the loop each time it repeats.