Here is my situation, I have season one of stargate by the episode, .d2v's for video, and uncompressed .wav's for audio. I want to make an avisynth script that simly returns all the episodes with audio in order. I have tried two different approaches in avisynth, both of which work great for video, however, audio works after 15 episodes are appended to each other, but when I add a 16th, I loose the audio. Opening the .avs in virtualdub and checking the file information shows an audio stream, however it contains 0 audio samples. Here is a sample of how I am trying to do it. I did try other methods, however they resulted in audio async, and also exibited the same 15 episode combine limit on loosing audio. audiodub(mpeg2source("ep101.d2v"),wavsource("ep101.wav")) ++ \ audiodub(mpeg2source("ep102.d2v"),wavsource("ep102.wav")) ++ \ audiodub(mpeg2source("ep103.d2v"),wavsource("ep103.wav")) ## etc, etc Is there an internal limit on audio run through avisynth?