sound cards locked, No Host

[Thomas George <debianlist@mailfence.com>]

Just upgraded to Bookworm

no sound.

alsactl says sound cards locked. There is a lock directory in 
var/lib/alsa/asound-state

mpv song.ogg fails with message No Host

There may be solutions in the debian-user archives. I am slowly reading 
these in search of a solution.

Any help?

Tom George