No sound

[treebeard]

Then I will wait with switching to pipewire - Thanks for posting!!!
Interesting: The last 2 or 3 reboots pulse audio startet automatically as it should do and has done before! There was no pulseaudio update the last days, perhaps any other update somehow 'fixed' this... or it's just random/luck.  I will further observe this when rebooting the next days.

Bookworm is in a transition from pulseaudio to pipewire so that's the likely cause of some recent audio breakage.  I did a dist-upgrade today - the first since late September - and got many pipewire-related packages but lost things like audible call & sms notifications.  The only thing I had to do to get sound back was 

systemctl --user --now disable pulseaudio.service pulseaudio.socket

Stuff just worked after that (so far), even after reboot.
p, li { white-space: pre-wrap; }