MacMini HDMI Audio Out Not Working

Greetings all,

I have a 2010 Mac Mini plugged into a Yamaha RX-V71 Receiver via HDMI. The receiver is plugged into a Samsung TV via HDMI. The image displays correctly onto the TV however the audio only plays through the Mac Mini's internal stereo. When I go to System Preferences -> Sound - > Output - my receiver is not listed. The only items listed are the Mac Mini and the Samsung TV. When I go to Applications -> Utilities -> Audio MIDI Setup the receiver is not listed only the Mac Mini and the Samsung TV.

I have swapped out HDMI cables. Mac Mini is updated to Lion 10.8.2. The receiver is on and I have tried restarting the TV, Mini and receiver multiple times in different orders.

Does anyone have any suggestions or a fix for this?

Thanks!