Hey all!!

Been coming onto these forums for help and insight into my iMac, only now I need help with something I've not seen before...

I'm running an iMac thats only a year old and all of a sudden the Audio has decided to drop out. I have to restart it to get it working again and it's become quite the nuisance.
It's the main computer in my studio, and I'm running Logic 9 with a Lexicon Omega USB soundcard, but the audio won't work on anything - Logic, iTunes, internet...

Any hep would be appreciated!!

Specs below -


Model Identifier: iMac10,1
Processor Name: Intel Core 2 Duo
Processor Speed: 3.06 GHz
System Version: Mac OS X 10.6.5 (10H574)