Yes. Qu-16 to iMac via USB.
LR is routed to the iMac for recording. (this is where I wanted to add FX)
Mix10 is routed to house speakers.
I think the part I’m missing how to accomplish is how to turn the FX return going to a channel up/down. I’m not sure how to translate that to buttons/sliders. I haven’t watched the video just yet, but will be doing so shortly. That may clear that all up.
Thanks!