Jumpy WAV file from AC3 using VirtualDub

[1000watts]

I have a few AVI files that are Div3 and AC3 for audio, I used GSpot to veirfy this. I'm trying to convert the file to MPEG for a VCD burn.
When I use VirtualDub to save the audio to a WAV file, I get a WAV file with "jumps" in it. When I listen very close, the file jumps and skips every couple of seconds.
This 'jump' causes the video output to also jump after I merge / convert the video files with tMPGEnc. At first I thought that the video problem might have something to do with the TMPGEnc conversion. After I went back and listened to the audio wave file, I heard the sound skipping at the same time the MPEG video was having problems.
The skips don't existing in the source AVI file. How can I get a clean video source from VirtualDub? Is there an AC3 codec I can load that will allow me to just use TMGEnc to convert the AVI to MPEG? The AC3 decoder is for DirectShow, it isn't really a full audeo decoder for ACE.
I'm doing the conversion on a Windows XP system, 512M of memory, AMD 1800 CPU and 15G free disk space.
Hopefully somebody has had some experience tweaking VirtualDub or some other utility for WAV conversion.

Thanks,
1000Watts

[0 kewl]

Look in here:

http://www.vcdhelp.com/forum/viewtopic.php?t=91588&highlight=ac3