I'm now testing JRiver MC 17.0.140 (and 132 version) with Denon RCD0N7 and here is my input:
Firstly I'd love to see Airplay function in JRiver. I tested Airfoil, but it doesn't show info about playing tune at all on Denon's display.
JRiver doesn't seem to detect Denon straight away. It need some time after turning it on. ITunes see Denon at once and working through Airplay constantly.
I can adding music to Denon's playlist, playing it, controlling volume bar,
but position(?) bar sometimes does not work(if I want set to specific minute, it go back to beginning of a track. If I control Denon by JRiver, Denon's remote control is only for adjusting volume.
When I try to push next (or rewind a bit) on Denon's remote control, music stops.
Using JRiver as controller there is missing info on Denon's display about artist:
There is no problem with album's name:
Spectrum analyzer on JRiver doesn't work, when playing music with Denon N7 (if I play music on my laptop it starts working).
When playing music on Denon with JRiver,
cross-fade between tracks doesn't work.
"Zoning" works great. I can play the same (or different) music with Denon and WAS7500 at the same time. Controlling it through JRiver.