do the new Macbook pros with HDMI out support 5.1 ~ 7.1 audio
The old MacBooks will only output stereo, even if you add a 5.1 ~ 7.1 external sound card.
So that fact begs the question, do new Macs with HDMI, output multi-channel audio?
MacBook Pro (15-inch 2.53 GHz), OS X Yosemite (10.10.3)