HDMI Audio problem or codec problem?

[mwdowns]

Well, it is working now. But I have to leave the audio output at 2.0. Sound comes out fine that way, even stuff that's encoded for 5.1. And my speakers all play the sound OK. But if I change the audio output to 5.1, I'm back to the no sound problem. I guess, as the tool-tip says, I'll just leave it at 2.0 and let the receiver decode the passthrough output (I have my Pi hooked up to my TV by HDMI, then an optical cable going from my TV to my 5.1 receiver).

Thanks for the help!