Movie will not play with audio passthrough enabled

Hi I recently started using Emby Theatre rather than MPC-HD. I have my media box hooked to my AVR (HK AVR354) via HDMI (Radeon HD6450) and have never had an issue with pass through while using MPC. When I enable passthrough in Emby Theatre, the loading circle spins then stops and the movie never starts. If I disable passthrough, then all works as it should. The AVR shows Multi-CH PCM which is ok but I would rather the decoding to occur on the AVR. I am on version 3.0.19.

BINGO! Enabled onboard audio in the bios, and added audio-device=wasapi/{53e410fa-44d1-48bd-8c4b-6961def6ab32} and everything worked in MPV including bitstreaming DTS-MA and TrueHD. So I dropped the MPV directory in appdata/roaming, re-configured audio passthrough and set video output to auto and all worked as it should in my limited testing. As for the auto-profile, where and how would I create one? I have a pretty simple ffmpeg setup so i would not think that it would be too involved. Hug