One of the reasons for getting the 720 was the DV in. I wanted to use it to edit my camcorder tapes and save them to DVD. When I use "erase section" and play the edit back it freezes for a split second and loses the sound. Anyone else experienced this and how can you work around it. The manual suggests the function is to erase commercial breaks. It is not too bad when you are changing scene but no good in the same scene Any help out there?