Don't know why this thread was archived when it was started on 6/7/2007 http://forums.parallels.com/showthread.php?t=12498&highlight=Vista+audio+choppy+3.0 But I wanted to respond and so I am. I have a Macbook Core Duo (not the Core 2 Duo) with 2gb ram. I am using Vista Ultimate bootcamp 1.3 with parallels 4128. (1gb ram for Vista) I've haven't been able to get Vista to play sounds or video without being extremely choppy (unplayable)(Works fine in bootcamp). I really would like this problem worked on since Netflix came out with 'Watch It Now' (only compatible on Windows and my Macbook won't output to my big screen TV in bootcamp) So Parallels is my only option besides using my Avermedia Quickplay scan converter which really isn't all that great.