first, I have an HT Omega Claro sound card and the logitech Z-5500's. I just connected my z-5500 back up to the pc because now I have room for them, the z-5500's are connected to the sound card using the digital toslink. Before this I was just using a set of 2 channel speakers with the one light green plug going in to the card and did not have a problem. Now the problem is im getting some kind of interference when I click an Icon, link, favorites and what not, sometimes the z-5500 pod is showing a signal when im browsing but no sound, the noise from the speakers is different also, sometimes high pitch and sometimes low. My next option is to try and go with a coax connection and see if mayabe its something to do with the digital signal. Ive tried the toslink that came with the card and a monster toslink and they both do it. Anybody have problems like this? or know what might be causing it?