I was using up until last night optical sound on the xbox from the lead that went from the 360 to my avermedia capture card and then to the TV. The Avermedia lead sent the optical signal perfectly. However I have now sold that so gone back to my original lead. The optical sound seemed to work on boot up, but then when in the menus and system it stopped. Not sure if it is the old lead I am using, or if there is something I am missing? Anyone else had this problem?