So, on the mackie, run the multi into that and use the effect sends/returns to go to the CC. Or use a TRS insert cable so you can use the mackie faders and such to control the level going to the CC.
So, on the mackie, run the multi into that and use the effect sends/returns to go to the CC. Or use a TRS insert cable so you can use the mackie faders and such to control the level going to the CC.