I have a 'cheap' GE 3-way passive A/V selector box. I use it to switch between my PC audio and DVD audio easily into my stereo system. Since hooking up my new DVD player (sony dvp-ns775v) the PC audio gives a loud, deep buzz. Removing the DVD audio from the selector box resolves the problem. It doesn't make much sense to me because a passive box should hard-wire the switch between components. There has to be some kind of impedance mismatch ? and inside the GE box there must be some resistors between each channel that cannot compensate for the mismatch. Cannot be a "true" hardwire bypass, can it? That is my best guess, but I really have no idea. Any help greatly appreciated! Feel free to ask for more details about my components, as there may be factors that I don't realize contribute to the BUZZ. The components: * * * * * * * * * * * * * * * * Dell PC - Soundmax Digital Audio soundcard Monster Standard THX-cert RCA-to-1/8" stereo cable. Sony dvp-ns775v Esoteric Audio Musica 100 RCA cable. GE 3-way selector with red, white, yellow RCA jacks for each.