Extracting Audio from iTunes protected files

I don’t know if I posted in the right forum but, once I buy a song is there any way I can convert those AIFF files into WAV files through some sort of recording/ extraction method. I want to be able to use songs in my customers slideshows without having to burn the AIFF music files to a CD, then convert them to WAV audio files because I do not like to waste that CD. Thanks in advance for your help.

use a CD-RW;)