Logic Pro 9; I'm getting this heading: Error while trying to synchronize Audio and Midi; plus the message: Sample Rate 42615 recognized. Check conflict between Logic Pro and external device. No sound coming from internal spkrs; Doesn't matter what type of file...all midi, midi with tracks bounced to audio; Message pops up continuously and playback is stopped every time. I've obviously done something stupid with preferences or something. How do I get back to normal operation?

I guess a simple "reboot" fixes a lot of things.