Multicam Sync Based on Audio

For the life of me, I cannot get multicam sync to work when synced using audio waveforms. I have literally tried almost every different settings combination of the "Create New Multicam Clip" dialog. Each camera is am .MOV or .MTS file with stereo audio tracks and each camera could clearly hear the subject. Depending on my combination of settings, I either get a clip with each file from each camera on its own track, often with different clips from the same camera synced to each other, or if I use angle or camera metadata I get a track for each camera but the cameras aren't even closed to synchronized. Are other people using this feature successfully? I've been using PluralEyes instead.