Multichannel DSP using Moode and CamillaDSP

[howabout]

I am about to start a project building a 3 way active speaker using DSP crossovers and Camilla DSP.

I was hoping to use an RPI 4 and connect to an AVR receiver through HDMI to get 6 separate channels of audio, is that possible and have anyone done it? Or do I have to use an external soundcard (Asus Xonar U7) and connect through USB?

What is the preferred way of getting 6 separate channels of audio from Moode, USB or HDMI? Does anyone have any practical experience doing this?

Thank you so much for the great job you are doing on both Moode and CamillaDSP!