Hifi and science

On an anecdotal level, hifi music often overwhelms everything else I am doing. When I hear a song that I like, on equipment that i like, nothing else really matters. I am happy and absorbed, and ensconced in the sound.

On an evolutionary level, why do we humans enjoy music? Why do we dance? What is it about certain sounds that makes me feel like i do? What is the evolutionary function of music? Are these feelings and effects all just neural impulses? If so, to what end?

Luckily I am not the first person to think about these things. I have just come across a book that I hope will help me answer some of these questions, or at least explore some of these ideas.