Hi everyone, I'm just interested in hearing about your experiences from running MainStage as the tempo sync slave? I do that myself on stage and my tempo sync master is the live looping AU plug-in Mobius, hosted on a bus by MainStage. As I record my playing and create the first loop in Mobius the plug-in sends out a MIDI Clock through the OS X IAC and MainStage hooks up to follow the tempo right away. This is just so beautiful and has never crashed on me! Here's a video demonstrating this use of MainStage http://www.perboysen.com/archives/132 One thing though, that I have not been able to make work, without crashing MainStage, is to also host UltraBeat sequence pattern (or iDrum) while tempo sync slaving MainStage in this way. Any hints?