I have found after years of

I have found after years of shooting theatre performances with two or more cameras that the easiest way to sync footage in post is with a foot fall rather than with sound. Locate a moment in the game (or in my case in a musical play) where someone is running down the base line. Then line up footage from all your cameras so each coincides with the runner’s left foot touching the ground. It’s a great deal easier than trying to sync using audio.