Video & Audio out of sync using iMovie and Photo Booth

I just bought a NEW iMac this month and I am trying to record a 5 min clip. during play back in iMovie and photo booth the video looks slow and its not synced with audio until the clip is at around 4:30.
I am using the internal mike and built in camera.
Its a new computer with plenty of space in it and no new programs.
I have looked through the threads on this sight but cant find my issue.
Please Help.
thank you,
Kelly

Hello G E2
You have made a good start and already considered a couple of the most likely possibilities that could have caused your problem:
• CPU performance settings and
• multiple apps running
re: CPU performance setting: I am not certain, but your MBA may run even faster when it is connected to power that when running on battery, even with the processor performance setting configured for best performance. If you are not already running on AC power, do a test while plugged in and see if that helps.
re: multiple apps: Consider the possibility of background widgets or apps that might be running. If you have not already tested this way, restart your Mac to eliminate possible widgets, quit all startup items, verify that Spotlight is not your indexing disk, and verify that no Time Machine backups are running. Then test video recording again.
If you do not get your problem corrected otherwise, consider the relevant suggestions in this list of possibilites regarding A/V recording sync issues:
http://discussions.apple.com/thread.jspa?messageID=7089133&#7089133
Some of them may not be relevant to your MBA, but you may find something helpful there.
If your problem is as bad after any actions you try from that list, when you post back for other ideas, give the details of any new info you found as a result of the additional checks / tests / actions. We will try to offer detailed suggestions in reply to your specific new info and questions.
EZ Jim
G5 DP 1.8GHz w/Mac OS X (10.5.7) PowerBook 1.67GHz (10.4.11) iBookSE 366MHz (10.3.9) External iSight

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