r00 extracted video plays, but no sound???

I extracted my r00 files and can play and watch all of the video... but i cant hear a thing. How am i to get the sound working?

Find out the audio codec
http://www.moviecodec.com/topics/61931p1.html
Then download it.
If it says tag 2000 or 8192, it’s ac3 (one of the more frequently requested ones). Get it here http://sourceforge.net/projects/ac3filter/