I have a problem with my RX 570 and the driver Adrenalin 2020 Edition 21.2.2. With this driver I have no sound over HDMI.
With the old driver 21.1.1 it works fine. I think it's a driver problem. Is it know?
yellowflash is right its an driver issue.
A friend told me he has no HDMI Sound, i looked on my PC and dindt find HDMI Sound in the Audio Settings, after i overinstalled 21.1.1 the HDMI Sound Option was back.
Your AMD driver is messed up.
By the way i dont use HDMI Audio, i just wanted to help out my friend and searched for the problem.