Rolled back to 3.8, low and behold, sound works. Not sure why this happens for me and not everyone, but I can't even check out the 3.9 beta...no sound! Oculus Home devices tab shows no audio, and nothing works to fix it.
I unplugged /plugged back in the audio cable, I reset Oculus Home, I ran Windows sound trouble shooter, nothing worked except rolling back to 3.8.
I hope this gets seen by who ever it needs to be seen by. I hope 3.9 doesnt go live with this bullshit.