Wav Creater 1

I want to create a program that uses the frequency analyzer but instead it reads in a number of .wav files (music files) and then randomly out puts new music. The process of creating the frequencies is the same as described below. Then it groups the frequencies together based on similar previous characters but it would instead pick a random one using the frequencies as the probability for being picked. I think it would create some interesting music and, if it works as well as i hope, it would sound similar to different kinds of music but different all together... hopefully. I'm not going to post any code for this for a bit until I work out the frequency code a bit better. Also i have no idea how .wav files are formated (replies with helpful links would be appreciated).