Just trying Roon for the first time with a Devialet Expert Pro.
I am able to play with Devialet AIR or System Output. However, I cannot play with either Devialet RAAT or Devialet Airplay.
I run Roon 1.6 on macOS 10.14.2.
I checked the macOS firewall. Both Roon and RAATServer are allowed to accept incoming connections. Devialet AIR is disabled (I tried also exiting Devialet AIR altogether.) I rebooted the Mac. I rebooted the Devialet Expert Pro.
Still, neither Devialet RAAT nor Devialet Airplay zones can be made to play something. The button play button is inactive and the text next to it says: “Nothing playing”, as showed in the figure below.
I’d remove the Devialet Air Zone so it doesn’t cause conflicts with the Roon Air zone later on. In fact if you can I’d completely uninstall the Air driver if the Roon Air implementation works well.