I’ve complained many times here about how complicated home theater is. There are more wires by far coming out of my stereo system then there are coming out of my 5 computers and their associated devices (printers, routers etc etc). I’ve even posted pictures here of the mess that is the cabling situation. Cnet has posted a pretty good guide to all the different formats and what the bajillions of acronyms mean. For the record mine supports 6.1, all the Dolby formats with the exception of headphones, and DTS up to Neo:6.
This stuff is harder to keep up with than compyer stuff, I’m not exagerating.