HDMI Sound Woes in Windows 10 (Asrock FM2A88M)

[Benneh]

Heyup!

I took the upgrade to windows 10 and at the same time decided to upgrade my 7 year old HTPC. I purchased:

Asrock FM2A88M-HD+ Motherboard
AMD APU A6-6400K Black Edition

Set it all up and everything worked fine, except for the sound over the HDMI port. The issue it is only saying 2 channel and will only play in stereo (although it does list dolby and dts as acceptable formats). In speaker setup it only lists stereo to test. In Kodi I do not get 5.1 passed over the HDMI (passthrough enabled etc etc).

My setup flow is HTPC (via HDMI) to 42" LG TV which then has an optical connection to my amp (same setup used by my xbox one/ps4/ps3 which works flawlessly and gives me dolby/dts sound).

I have installed the lastest ATI HDMI sound driver from their website, and have also tried installing the Realtek HDMI drivers after some searching on the web (these simply caused the HDMI sound to cease functioning so dont believe they are the solution).

From reading about I belive this to be a driver issue, but cannot seem to work it through, any suggestions, someone had suggested getting the hardware ID and googling it to see what driver pack supports it but I have no idea how to locate this info.

Any suggestions warmly welcomed, maybe I'm not understanding HDMI audio very well (previous motherboard had a spdif port so I had it connected direct to the amp via optical but thought as the new motherboard has HDMI I would just do the same as I did for my xbox one and have the sound go over HDMI into the TV then onto the amp thus simplyfying my setup).

Cheers!

 

[Lutfij]

From reading about I believe this to be a driver issue,

that's known across the board after Windows 10 rolled out and for some users the issue is non existent i.e if you're talking about connecting via the analog connectors.

Just as a checklist, have you updated your BIOS with version 3.10? Have you installed the latest drivers from ASRock or AMD? There was s hotfix from AMD pertaining to Crimson with version 16.1.

APU drivers
Chipset Drivers
I also took cues off of 64bit architecture assuming your HTPC would have more than 2GB's of ram. If you're on a 32bit architecture, the corresponding installer is available

Also have you tried connecting your amp to the motherboard/HTPC via the analog connections or the HDMI out(motherboard) to your amps input (HDMI in)?

I'd also like to stress that the same issue came about for my friends HTPC which I built and is connected to his 46" Phillips TV back in 2010. The content we viewed although had 5.1 channel audio encoded into it, the television only perceives it as 2.0/stereo. Klite codec pack shows its 5.1 channel but the audio output from the TV to his Bluray player/Hometheatre system shows up as 2 channel and can be upmixed/dummied to 5.1 channel surround but not true 5.1 channel output. When he lent me the system for troubleshooting, I tested it out with my FPS1000 unit and the surround sound worked flawlessly.

Perhaps if you had a friend who could lend you an amplifier for a few days to test out which has both HDMI input and HDMI output as well as analog connection support and the issue with the software can be ruled out.