I guess I could hook the mics up to another mixer, then route 2 auxs sends from mixer 1 to the QU-16 and then use that channel as the trigger. I’ll try that.
Like Steffen suggested select an open mix to be the trigger source and then bring up those two mic channels in the selected mix for the trigger. I would go post fade for that mix.
This is how you do it. 1) Use a group and add only the two MIC channels to that group with their faders set at unity (0). 2) Set the group’s fader to unity (0). 3) Remove the group from the main LR mix by selecting the LR mix and turning the group off in the MIX display. 4) Select the ST1 channel and turn the Ducker/Inset switch to ‘Ducker’. 5) Switch the ducker on with the ‘Ducker’ button. 6) go to the Ducker screen and select ‘Grp 1 L’ (or whatever group you used) as the Trigger input. 7) Adjust the depth value to how much you want it to duck. Done 🙂