This question came up on the FCPX Editors InSync secret society I was asked to join today. How do you do a multicam edit AND keep all your audio from all the camera sources up and live at the same time. There is a little bit of a ‘cha-cha-cha’ to get it to work but here is the solution.
After posting this tutorial, I got a message from Mark Spenser from Ripple Training and he pointed out another way to do this. I was on a roll and decided I was just gonna make one more tutorial to highlight a few details.