To activate the glorious old "beep":
cp /etc/pulse/default.pa ~/.config/pulse/default.pa
add this line unload-module module-suspend-on-idle
to the bottom
nano ~/.config/pulse/default.pa
### Allow including a default.pa.d directory, which if present, can be used
### for additional configuration snippets.
### Note that those snippet files must have a .pa file extension, not .conf
.nofail
.include /etc/pulse/default.pa.d
unload-module module-suspend-on-idle
.