I have just started using a Blackmagic ATEM TV studio. It works with SDI & HDMI inputs from camera & I’ve set it up with two lapel mics on camera 1. The audio however drifts progressively out of sync. When I place a 7min clip on a fcpx timeline, the audio is 22frames shorter than the video. Which i guess means that tentacle sync wouldn’t work for my situation right?