Well, someone needs to do such setups, because there is some really weird **** involved.
For instance.
I recently upgraded my Xbox 360 console, so now I have an HDMI output. I've got HDMI from my HD cable box, and now from the Xbox as well. Now, both HDMI inputs can send the sound to the TV. The TV also has a digital audio output that can send the sound to my surround sound system.
Except.
The DAO only seems to work off the HDMI from the Cable box. The Xbox sound doesn't show up at all! WTF?
Then it gets weirder.
I took my Xbox over to a friends house, with the HDMI cable. His TV wouldn't play the audio at all. I know it's not the Xbox, since it puts out sound over the HDMI at home. We couldn't figure out what was going on.
It shouldn't be this hard to just get sound from one device to another!