As was mentioned, you need a Ground Loop Isolator. You can get them from Radio Shack, Catalog Number 270-054. They're around seventeen dollars U.S.
Tom ** Message From: Steve Robertson ** >Hello all. > >I am running a simple patch cord from a y-cord plugged in to >the output of my sound card over to a cord which splits to >two male r c a plugs which are in turn connected to my stereo >amplifier. For some reason this is introducing a low level >hum both in the stereo speakers and the speakers connected to >the other half of the y-cord from the sound card. Does anyone >know of any way to eliminate the hum? To unsubscribe from this list, send a blank email to: pc-audio-unsubscr...@pc-audio.org