Volumio devices are Roon Ready: they show up in Roon as a speaker, and Roon sends them the music in full quality.
Roon is a separate, paid service. You need a Roon subscription and a Roon Core running on a computer or a Roon server in your home. Set it up from Roon's website. Roon Ready is available on Volumio devices, not on Raspberry Pi and PC installs.
Play from Roon
Make sure your Roon Core and your Volumio device are on the same network.
In the Roon app, go to
Settings→Audio: your device shows up underRoon Ready.Press
Enablenext to it and give it a name.Choose your device as the zone to play on, and start the music.
While Roon is playing, control the music from the Roon app.
Troubleshooting
Your device doesn't show up in Roon
Check that the Roon Core and the device are on the same network, without VPN.
Go to
Settings→Sources→My music→Music sourceson your device and check thatRoon Readyis on. If it is, turn it off and on again.Restart the device, then check again in Roon's
Settings→Audio.
Volumio's controls don't work while Roon is playing
This is normal: while Roon plays, it controls the device. Use the Roon app, or stop the music in Roon to use Volumio again.
Other issues with Roon
For issues with the Roon app, your Roon Core or your Roon subscription, contact Roon's help center.