I have several Vixia cams in the 30/31/300 series. When I shoot a scent longer than a few minutes, the cameras separate the scene onto several segments on the SD card. In FCPX the videos line up just fine by dropping them into the timeline one after another. But when I try to sync them to my external audio, which is one single file, the audio goes out of sync where the video segments join each other. The video, however, plays fine with no jumps. I am shooting on the highest video setting, MXP at 1080p. There must be a setting in the camcorders for this, but I can't find it. Any ideas?