Hi guys, first, let me start of by saying I have never, ever, ever been able to get HDMI audio to work, on multiple builds. the whole convoluted thing with DSDT edits and such has always eluded me, as there's so much variability and things change so much that what works for one person wont work for another. I had honestly all but given up on making it work, across multiple systems. so i was setting up an XPS8300 a few weeks ago (see my other threads for fun with a GTX670 in that build) and was making another feeble attempt to get HDMI audio working, and was getting nowhere with it. I started doing some searching, and came across this: http://forums.macrumors.com/showthread.php?t=1499797 I dont know what this guy did exactly, but this hdmi audio kext he has made is in my mind, GOLDEN. I have tried this on every build I have available to me with a graphics card with HDMI, and every single one has worked, flawlessly. plug and play works. audio transmission works (both stereo and up to 7.1, i connected an xps8300 w GTX670 to my home stereo, instantly saw 8 output channels and passed both stereo and DTS signals with no issue from plex) curious if anybody else has tried this kext and if they've had equally good results? im going to try it this weekend with my dual xeon build which has no built-in sound capabilities, will report back on that one and see how it goes.