No solution to offer, but I feel your pain.
I have no sound at all. The rest of the program works like a dream.
Searching this Forum and looking at tut videos on YouTube, the answer appears to be an box that needs ticking.
"In the Options -> Devices tab .........."
My problem is, I haven't got a devices tab. It goes Video-Audio-HotKeys-etc. The Devices tab should be first.
I would dearly like to know what the explanation is. 🙁