Hmmm... this gets me thinking ... I use Reason 7 with the MIDI clock synced to the MicroBrute via a Focusrite Saffire Pro interface. I've had sync-drop problems from the very beginning though I didn't have any idea what causes this to happen. Now, after reading your story @arturiadontbug, I think it's the idle time, when Reason is not playing any song..... like when you discuss this and that in between songs, for 10-15 minutes, during rehearsals... if memory serves right, the sync-drop always happened during these inactive periods and never while playing... . played one song, sync was OK, had a 10-15 minute break, started to play the next song, sync is gone.... When this happens I usually have to restart Reason and the MB as well.... powercycling the synth alone doesn't always seem to work... Anyways, I'll be testing sync in continous play-mode and hope to have satisfactory results.. if so, I'll be half-happy and maybe stop worrying about the "out-of-sync in the middle of a live performance" nightmare that's been haunting me since sync dropped the first time. True relief will only come if this issue gets fixed by Arturia with a firmware update.