[K0D1User1138]

I still can't get this system to passthrough audio in Kodi. No clue why. I have another system running the same Windows version and using the Intel Display Driver for audio and it does both audio passthrough and hardware based MVC 3D no problem. Same Kodi version, everything. Insane how stupidly difficult this is to get working properly.

And now I found the solution which has nothing to do with audio settings or codecs specifically but is instead a video setting as noted in this thread.

Thanks to those trying to help or even just reading my rantings.