I am sorry to hear you are having problems with the HDMI audio in your system.
Please note that we have identified a problem with the HDMI audio and we are working to have a solution for it as soon as possible. You can check more information at the following link:
If you are using already the latest graphics driver from our side, my recommendation is to try the latest bios update from the board manufacture.
I did check that thread before posting. The 3 cases described don't match my issue. Hence tge new question. If you believe my issue is related to the wider problem then thats fine.
I have version 2.3 of the motherboard bios, whic I believe to be the latest.
Thanks for the information. Have you tried the OEM drivers for your system?