Output From Nucleus

[Flashman (Michael Fanning)]

Does the Nucleus output from both HDMI and USB at the same time? I think it probably does, but don’t know.

Yes

Also, would the DAC need to be Roon ready to work plugged into the Nucleus USB or would it just work regardless?

Any audio device recognized by the OS will be recognized by Roon, from Built-in Sound to PCI Soundcards to USB DACs. You might check out this thread if you want additional information.