No loopback that I have seen. RME has this too through TotalMix, but that feature is fairly advanced. The CQ is pretty basic, but a great little box.
My RME UFX+ in my project studio just died – needs a new PS – and I’d be shut down if I didn’t have the CQ to hold me over until I get the UFX repaired. I continue to be impressed with just how handy the CQ is.
I was just reviewing some old gig tapes that we made through an A&H 16ch analog mixer into DA-88s back in the 90s and the sound is just incredible compared to far more expensive studio pres I have. That’s why I jumped on the CQ as soon as I saw it. I’m still blown away by the incredible value.