Hello! I work with Pinnacle Studio 14. I have a long video that i have to edit and cut to smaller pieces like 5min. After exporting the small videos to .wmv format i noticed that two of them (12) have sudden noise (like kkkkshshshshshsh) part in the middle. the noise is so high that it hurts my ears with headphones. It lasts for couple of seconds and then the sound becomes normal again. Please what can it be and how can i get rid of it??