I tried using the search function and I didn't get any results. Here is my friends problem. He has a reciever with only 1 digital optical input (no digital coax). He just got Comcast High def cable and wants to take advantage of HBO high def with 5.1 audio. The Comcast box comes with a digital coax out. Is there any kind of 5.1 splitter he can get without loss of signal? thanks.