Nucleus+ with C4 EA-5 system and stand-alone DAC

Hello @simon_bones,

Welcome to the forum!

Yes, this is correct. You can play music through the Control4 interface to any zone which you can access natively through Roon. If you wish to see the Control4 - Roon interface, you can find screenshots on our module documentation: https://kb.roonlabs.com/Control4

You can control the HDMI output from the Nucleus and feed it into an AVR, but do note that at this time, it is not possible to set up the HDMI as a connection in Composer. We have an active ticket regarding this and are working on adding this feature. Please see this thread for more info:

What you cannot do is use the HDMI output from the EA-5 controller as a Roon endpoint. Some users have gotten Airplay to work with Control4 processors, but we have not tested using Airplay to EA-5 yet, so your results may vary.

Yes, this is correct.

If you are using the Roon - Control4 module, then all of the commands will be going to the Nucleus. The Nucleus would first perform any processing/DSP and then pass on the audio stream to the endpoints via RAAT, Roon Ready or other supported Roon protocols (Sonos/Airplay/Linn/ect.). As mentioned above, you cannot use the EA-5 as an audio endpoint except for Airplay.

Do keep in mind that while the Control4 interface might be useful for queuing up tracks and starting playback, it does not offer the full range of features as the native Roon app. Performing metadata edits, enabling DSP or configuring device settings (to name a few features) is only possible in the native Roon app.