Connecting 220 to my network

[David A]

Have tried both

1 - Wi-fi on, ethernet off
2 - Wi-fi off, ethernet on

In (1) when AIR is selected, the display shows AIR with the wi-fi signal symbol
In (2) AIR cannot be selected
In (2) there is still no Ethernet

There are other strange inputs offered, like ROON READY, Spotify, UPNP, Airplay

There does not seem to be any documentation.  I sent two emails to Devialet and received an auto-response

The lack of proper documentation is a nuisance and detracts from the use of the unit

In your situation (2) you will not see an Ethernet input, what you see are inputs like Roon Ready, Spotify, UPNP, Airplay. These are all ethernet inputs and if you look carefully you will see an ethernet symbol displayed along side each one, just as you earlier mentioned the WiFi symbol displayed alongside AIR in case (1). You're right about thinking that some documentation would help.

I think the issue most probably has something to do with your settings on your computer. I haven't used a Windows machine in 20 years, I've never used JRiver, and it's over 4 years now since I used Devialet's AIR app on my Mac.  I would guess that your problem lies with something in your settings but I don't know where to suggest looking.