at some moment I used ZEDi10FX into MBP. it worked, but I won't call it a high-end recording solution.
ZEDi has three modes: one for post-gain pre-fader pre-EQ M1-M4, one for pre-fader pre-EQ M1-M2 and stereo mix from console (post-EQ, fader and balance), the third is M1-M2-AUX-FX. those are selectable with buttons on top of ZEDi, check it's manual.
I recall that pre-fader output from ZEDi was rather quiet, it produced a quiet signal that I had to massively boost in my DAW. I'm afraid that if you're talking about this, you'll have to live with that, as I didn't find a way to improve it.
