Well i used to have an adapter for my optical cord that would interfere with my hdmi cord. Well i do still have it but for some reason it just doesn't seem to work. Either the thing is broke or i have to change some setting on the 360? (you never know i did update to the latest version after all). So it all boils down to two questions, is there anyway to configure where you get sound from on the 360 (hdmi, optical etc.etc.) and if not and the thing is just broke, is there any other adapter that fits while having an hdmi cord connected. Oh the one i used before was a brand called Monster i think.