Convert iTunes into MP3
One of the major flaws which is inherent in iTunes is that their downloads can only be played on iPods. If you do not have an iPod then iTunes MP3 downloads will not work on your mp3 player. Their mp3 files work on all players.
iTunes is an application that allows you to encode CD tracks or audio files in .aif or .wav format into .mp3 files (as well as other compressed audio file formats).
For the conversion please Follow the link http://www.wellesley.edu/Computing/Idocs/Itunes/convertMP3.html
Source: Wellesley