I've had my UFX II for about three months now and I'm really enjoying it.  Excellent interface!

I've been using it via USB with my Windows 10 PC, but I'd also like to start using it via my Linux based USB Sonore microRendu, if possible.

I can successfully use the microRendu with output to Main out 1/2 (XLR outputs) using Roon as the software player.  But if I try to use multichannel (for digital crossovers) it doesn't work.  I can't route signal to anything other than the XLR (main 1/2) out.

Is multichannel output supported in the UFX II in CC mode via Linux drivers?  I'm trying to figure out if this is an RME limitation, a Sonore driver issue, or a Roon issue.