Audirvana

Hi Leroy,
Another possible option:  
Your DRA-800H  seems to fully support a Wired LAN connection, as shown on page 40 of your manual.  Try a direct connection from your computer's ethernet port to the LAN input port.  If you can get your LAN set up and functioning, that might be the best of all worlds.  Looks like an interesting receiver, good luck.

I've hooked up an optical from pc to the denon and it still doesn't detect the denon as a dac 

Do you have guest network? Generally when the 2 components are NOT on the same network, these issue happen. Make sure your Wireless and Ethernet network are the same. Or at the least your wifi is not connected to a guest network.

Just a thought, as it happens sometimes between my laptop connected to the ethernet and the iPad which is wirelessly connected.

Both are hard wired to the router, pc and denon