I have a multi cam setup using three cameras all running SDI. Camera 1 has audio coming from wireless lav mics. I have shot gun mics on the other two cameras as backup. I want to turn automatic follow audio off on cameras 2 and 3 but have them use the audio from Camera 1. So no mater if I choose camera 1, 2 or 3 I will have camera 1 audio and then when I switch to a vmix call or video file the audio will follow those and the follow cameras no mater which camera I choose.

I have used the overlay/ mix audio feature and have positioned the overlay off screen but hope there is an easier way.