We're trying to render a video around 7mins long,1080 quality, we used Sony Vegas Pro 9 to edit it. When we rendered it the first time, we did it in 1080-24pYUB and the format was AVI. The audio was choppy at places. The second time, we tried 1080i-60iYUB w/ AVI format and the audio was even worse and so was the video. Any info on what we can do to make it render properly?