Hello, and welcome to the forum. One easy way is by using VirtualDubMod.Use File...Open to open the current .avi Use Video....Direct stream copy to avoid reencoding the video. (Direct stream copy is the default for audio) Use Streams...Streams list to see all the audio streams in the AVI. Select the stream you do not want, then press the Disable button. Use File....Save As For more info, see