[smic]

ok so i have my old imac in my closet acting as my file server. then i had this idea to use it as an mp3 player for my stereo, controlling it over the network. so i hooked it all up to my amp, but when i select it it emits a hum/buzz, at a lowish frequency.
i thought it was the rca cables i was using, or the minijack-to-rca thingy, so i changed them around, got new ones, still had an annoying buzz. so i tried the headphone jacks instead of the external speakers jack, still had a buzz.
so i tried my ipod, sounded fine, and i deduced that its the imac that is sending the frequency like its getting to much power maybe?

anyone else have this type of problem, or heard of it before?

[tRr]

Here is a whole bunch of options I found on Apple's site:

http://docs.info.apple.com/article.html?artnum=86655

[visionarymac]

Having done audio for some years, this is an all too common problem. What is most likely happening is that there is a difference in ground potential between your Mac and your stereo. If you haven't resolved your problem by know, I suggest you go to Radio Shack or search the net for an isolation device that you can place in-line that allows the audio to pass but not any damaging voltage.