The only way to use Roon with the PWD is with a USB cable from your computer. Roon will not work with the PS Audio Bridge. There is some discussion about this on the PS Audio forums
Alternative to JRiver for PS Audio PWD II with bridge and Mac Mini
I am still trying to get the simplest Mac mini music server to feed the PS Audio Perfect Wave DAC II with bridge. I don't like JRiver. Do I have any better player options that will work? I will need one with a well designed iOS remote control app to control the music via iPhone or iPad as I will not have a display connected to the Mac mini regularly.