Salut Yoman,
Il est déjà installer de base, il s'appelle Ajustement. tu peux juste modifier le son des notifications.
pepe@2a02-8434-d801-3401-e5d4-f0a6-1e6c-924b:~> systemctl --user list-units | grep -E "(pulse|pipe)"
pipewire-pulse.service loaded active running PipeWire PulseAudio
pipewire.service loaded active running PipeWire Multimedia Service
pipewire-pulse.socket loaded active running PipeWire PulseAudio
pipewire.socket loaded active running PipeWire Multimedia System Sockets
pepe@2a02-8434-d801-3401-e5d4-f0a6-1e6c-924b:~>