I found the reason I was missing USB Codec audio - a virus.
The Codec microphone level was zero and muted. If I unmuted and turned up the level, it would revert to
zero and mute in a few minutes. This also happened on the second sound card. I smelled a rat and ran
a scan with Malwarebytes. It detected and deleted a virus.
All is now well. FIXED.
73 Bob K2QPN