dark_jedi said:

actually I do not know how to set up an avisynth script to do what you have there,another thing I did not know avisynth could do LOL,I have just been loading the avi file into VDub and then loading the audio into VDub and using it to find and set delay like I have always done,and yes I have been down converting to wav.

Is it better to check sync with your avisynth method?

It should not make any difference whether you use AviSynth or Virtualdub. If you want to try avisynth, the script is very simple:

video=avisource("anh2.avi")
audio=wavsource("anh2.wav")
audiodub(video, audio)
delayaudio(0.000) # adjust for sync

What prog are you using to decode/downmix the AC3?