Thank you for this. I just had to enable the Oppo in the Roon settings duh on my part. I have it working now. It sounds different than my Sotm SMS 200 ultra. The ultra has more dynamics. The Oppo a bit smoother. Or laid back. So good mastered music goes through the Sotm marginal goes through the Oppo. Bad gets shut off quickly.
RonAll the 205 needs to be is on your network and having the latest firmware. To set Roon up, Roon needs what it calls a Core, that is a server that has direct access to your music files. The Core can either be a standalone program on a separate server without a user interface, or you can do it with a combo UI + core version of the program. But Roon can be configured from any client...PC, Mac, Android, iOS, it doesn't matter. You go into the "Audio" setting and you can control every different place on your network that has what Roon calls an Endpoint. The machine the Core or main application can be a an endpoint (any machine running Roon on your network can be an endpoint). There are network players and DACs that has Roon's software built in, like the Oppo 205 & 203. All you have to do is activate the endpoint and you can use the preferences to make any tweaks you like. Other endpoints can be Airplay devices (Airport Express, compatible receivers, etc) and Squeezeboxes.
There are a couple of limitations using a 205/203 as a networked Roon endpoint. The Roon software on the 205/203 cannot do native DSD so Roon will automatically convert the song to whatever the endpoint can handle. Roon is pretty good about the conversion process and all the steps it does. It also cannot do multichannel music through Roon directly to the Oppo (and will downconvert to 2 channel automatically).
In order to get around the DSD limitations, I ran Roon on an old Mac connected to the USB DAC port on my 205. But that may be overkill for you.