Using a Panasonic professional cam and a Logitech headset. After about an hour of recording, the audio is ahead of the video by a good three seconds. That can really take the suspense out of a basketball game... Is this due to the time it takes to process the video stream as opposed to the time it takes to process the audio? Would it be better to use the DV audio source as well? Or, should a DV video source and a Logitech headset work fine?