I recognized quickly this was likely a Dirac issue and reached out to them as well. This was the response:
I don’t think you’re missing something, you’re trying to configure a DLNA setup… in order to be able to avail of Dirac Live you’d need the Dirac plugins in the player, as mentioned for example here:
but Roon (as far as I know) does’nt support plugins, or a standalone DSP like this:
So I am guessing given my very limited understanding of the protocols involved that If the Dirac Processor is running on a music server - the connection between the server and the DAC must be USB, digital coax, or toslink. I am not sure the ethernet to Roon Endpoint path works without the plugin referenced in the Dirac response above. I have noticed some users are asking for such plugin functionality in future versions of Roon.
I am hoping someone can share a currently accessible method to get things done the ethernet route I had a power bump that apparently got thru the USB cable and blew out the USB card in my NAD 390DD. $300 to replace - but it did give me new 24/196 capabilities that I will never use. My next step will be to try a 35 foot long toslink cable from my iMac music server to the 390DD and see how that works. Should eliminate the possibility of another power bump getting from computer to stereo system.
Got Dirac running again via new USB card and new cable though. Amazing stuff.