Hi Georg,
You can use squeezelite instead of roon bridge. By default, it uses the system sound. You can enable squeezebox support in roon and try it out
squeezelite -z
On fedora I use this systemd script for startup in the user session. So, disable squeezelite as system daemon and enable it in your user session, uninstall roon bridge.
systemctl --user --now enable squeezelite
me@fedora:~$ cat ~/.config/systemd/user/squeezelite.service
[Unit]
Description=Squeezelite headless streaming music client
Documentation=man:squeezelite.service(7)
Wants=sound.target
After=pipewire-pulse.service
[Service]
Type=exec
ExecStartPre=/usr/bin/mkdir -p .local/share/squeezelite
ExecStart=/usr/bin/squeezelite -N .local/share/squeezelite/player-name
[Install]
WantedBy=default.target