I have 18 vob files that play fine and have sound when played in windvd. After running them through vobedit to join them together I loose sound in some of the chapters? Thought it maybe just a windvd glitch. I then I use ifoedit to make it dvd compliant. When I put it in the dvd player it plays fine, but again no sound in some chapters? And its not the same chapters that lost sound after vobedit? Any ideas why I loose sound after vobedit?