The February 23 New Scientist is a special issue devoted to The Music Enigma. It features several articles on the biology, physics and neurology of music.
"Ava Chase of the Rowland Institute at Harvard ... has shown that carp can tell the difference between baroque music and John Lee Hooker, depressing a button with their snouts to indicate which is which. ... Java sparrows can not only distinguish between Bach and Schoenberg ... they could then apply what they had learned about the difference between classical music and more modern stuff to discriminate between the beautiful melodies of Antonio Vivaldi and the more atonal strains of Elliott Carter."
Steven Mithen's "The Diva Within" uses brain scans to show what singing lessons do to the brain. (Only excerpts are available online, unfortunately.)