Weird noise in the headphones

hello everybody,
now here is a little something taht totally wrecks my nerves. while trying to set up my laptop for recording (pismo) i noticed a distorted hiss in the headphones. it will not quit, whatever i do. its not the headphones, i doublechecked that with my other mac. can it be that the output has a bug, that i never noticed before? or do you have any other ideas?
thanks,
eddie

eddie:
How does it sound coming from the internal speakers, or external speakers, for that matter? The question is, first of all whether the problem is hardware or software related. If hardware, which is most likely, is it in the phones, the connection or where? If you have Griffin iMic or a similar USB device you can plug the phones in there and see if the problem persists.
In addition you can do the usual reset PRAM, repair permissions etc.
Good luck.
cornelius

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