Can dvd shrink alter audio books on tape (on CD) to shrink them? or does anyone know of any other free software that will do this? to compress audio files? to fit more on a CD? or to change wav files to mp3 format? (i notice that regular books on CD may use 8-11 CDs, but the mp3 version fits on one CD! how is that possible? any help with this would be cool. i tired to find a way on itunes to change the format from regular to mp3, but no luck. the length of the CD, the time, still remains the same.