Depending on what the Denon can do, it may just work. Please read about DLNA and Media Network on our wiki.
Turn on Media Network in MC options, connect your AVR to the network, then try playing to it from MC (using the AVR as a DLNA Renderer).
I've configured DLNA Server with the following options:
- Audiophile 24-bit DAC
- Generic DLNA
- Legacy UPnP
Not sure what the first option is, but it sounded valid.
Having some problems getting it to connect. I looked at the AVR-3313 user manual and it says:
"This unit can play back music files and playlists (m3u, wpl) stored on a PC and on Network Attached
Storage (NAS) that supports DLNA.
Important information• The network audio playback function of this unit connects to the server using technologies shown below.
• Windows Media Player Network Sharing Service
• Windows Media DRM10"
Running Windows 7 Professional X64
Does JRiver MC20 support these technologies?