A number of programs can do it...If I remember correctly, there use to be a site called vcdhelp.com that outlined different conversions and tools/software to use to make the conversions (it was for back-up purposes...ie., converting a DVD to smaller "format size" VCD). I believe the audio from the DVD file when ripped with certain software is stored in a .ac3 file. This was years ago, the software is probably alot simpler to use now.