Intermittent Audio Problems

I recently started having intermittent audio cut off on my IMac G5 which is 6 months old. All audio to inclue iTunes stops for no apparent reason. This even happens when I am just listening to iTunes and performing no other tasks. Sometimes requires multiple reboots to fix. I checked audio output setting and it's 44100.0 Hz as recommended. Sometimes audio will restart without a reboot. Machine has 1.5G RAM and I do not use it for anything exotic or heavy duty.
Am using a USB hub with printer, scanner and external hard drive attached. Tried disconnecting all, but problem still recurs.
Thanks in advance for any help.
Al R.

If you plug in headphones into the headphones port do the audio problems persist? I'd like to know if the issue seems to be isolated to the speakers, or to the soundchip and/or sound software.
P.S. Please note, that the iMac (Flat Panel) is actually an iMac G4. The iMac G5 posts you make in the future, please post in this forum:
http://discussions.apple.com/category.jspa?categoryID=134

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    This question is really in the wrong place - this is the iDVD '08 forum and not the iDVD 5 forum.
    From the description of your problem using Toast, it sounds like you didn't actually export a DV video movie out of iMovie.
    Export a DV video movie out of iMovie (it will run 13 GB per hour) and play it back with the QuickTime Player to see if the audio settings you made are really there. If this movie plays OK, you can bring IT into iDVD or Toast for turning it into a DVD.
    If the DV video movie you created STILL has audio problems in the QuickTime Player, ask you question about THAT issue in the correct iMovie forum.
    F Shippey

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