I just watched the 2009 documentary "The Musical Brain" – various neuroscientists studying the responses of the brain to the listening, composing, and dancing with music. Most interestingly, one professor (Daniel J. Levitin) studied what happens in Sting's brain when he listens to or composes music. Also interesting, Wyclef Jean was talking, using the sleepiest voice and expressions that I have ever seen, about how his eyes lighten up and how excited he gets when he hears or plays music.

Here is a synopsis of the documentary in my own order:

My first foray into reproduced music was as a listener. I enjoy listening to different types of music, and like most people I did not have much musical training as a child. I dabbled briefly with the saxophone and piano. While in college I was introduced to the joys of fine audio reproduction in the home, and it was a staggering difference from the middle fidelity reproduction that I had grown up with as a child listening to the radio and/or mass-market stereo systems.