2011 Mac mini hdmi 5.1 surround sound issue solved! No toslink needed!
Great news! My Mac mini is sending true 5.1 to my reciever through the HDMI cable! Okay so here's my list of gear.
MAC MINI 2011 2.5 i5 8gb ram
Using a quality audioquest hdmi I have connected my Mac mini to my Denon 1712 Reciever. I have connected this hdmi cable into hdmi port entitled game 2. I have connect my reciever to my tv with a monster 1000 hdx thx certified hdmi cable. It has a transmission sped of 17 gb or so...meaning it can handle transmitting 3d...if only I had a 3d tv.
Okay so that's the gear. Now onto the changes in audio midi. Open audio midi and Simply change it to 48000 hz and to 2 channel 16 bit integer. That's all I did and now it works. Before I had it set to 8 channel 24 bit and when I pulled up my surround sound options I could pretty much only get multi channel stereo. Now I can get several Dolby choices.
The voices are coming out of the center speaker and all the action is coming out of the other speakers....so in other words 5.1 surround sound has been achieved on my Mac mini 2011 which has Lion on it.
I have tested this with iTunes and Netflix. Both are in 5.1 and sound great. In iTunes I have tested both music and digital copies of movies. Both worked flawlessly.
Rejoice Mac mini owners 5.1 surround is now possible over your Mac mini 2011 edition with just an hdmi cable to your reciever. You can throw away that toslink cable becuase now you don't need it!
I hope this works for you. Remember not all hdmi cables and the same holds true for your reciever. If it does not work consider getting either audioquest or monster....everything else is junk.
Mac mini, Mac OS X (10.7.2)