Finally I got the audio to work again. I made three changes and after that it works, but I can´t really say what was the most important ones. This is what I did:
- Since ICEsound isnt supporting 22H2 I looked up ICEsound in the list of services and I stopped and inactivated it (restarted and checked that it remains inactivated).
- Reinstalled the Realtek audio driver by deinstalling it and letting windows update reinstall it during a restart.
- ...and this was not intentionally... during the restarts above Windows update installed an update (KB5019509) to 22H2
After this my sound is back!
Sorry, that's a no-go for me, since I don't have ICEsound.
An online chat with an Asus agent, which included downloading and reinstalling the driver, did not resolve the issue.