Sometimes (but not all the time) my audio gives me a static sound (sort of like the sound you get when an old tv went off air) when I stop the playhead. This sound is only for a second but it sounds pretty bad. I am monitoring through the LHi. My previous LHi had green distortion so AJA quickly sent me another one (great customer service by the way). The new card works well except for the audio problem. Does anyone have any suggetions? What do the different playhead sync. settiings in FCP change, I think it's off, gang, and open. What do they do?