I first noticed that firefox notifications have no sound. This is a new install.
notify-send -u critical "Critical notification!" "this is the body of the notification"
And the notification pops up, but no sound.
Versions:
notify-send --version
notify-send 0.8.1
ii gnome-control-center 1:43.6-2~deb12u1 amd64
If I click on Alert Sound radio buttons I get sound. I don’t see any other alert sound configuration (no level specific to notifications, just System Volume).