A query for any Mac users using Audirvana.
Apple recently removed the Bonjour tab from Safari 11.00 making it a chore to access configuration pages for LAN devices using the protocol.
Roon consistently sees my Nova but with Audirvana it's hit and miss, and 90% of the time (Roon not running) it won't detect it and reverts to playback using the Mac in-built audio output. Same after restarts of the Mac even if Roon not used.
Personally I think it's probably a software issue with Audirvana detecting devices to play via UPnP, admittedly it could be a network issue, but odd that Roon generally finds it 100% of the time - I hope Roon hasn't installed some helper app running in the background which hogs access but I doubt it. I do wonder if it could be an issue related to removal of Bonjour from Safari but that may be coincidence.
The MBP running Audirvana is on wi-fi, the Nova on ethernet via a gigabit switch.
The only sure way to get Audirvana to see the Nova is to unplug/reconnect the ethernet going to the Nova's ethernet port.
Also I'm not certain if this problem has only arisen since upgrading to the Roon compatible software a few weeks ago.