New York Public Radio's consistently outstanding show Radio Lab recently re-aired an episode titled Musical Language, and it's absolutely worth a listen!
Description from WNYC's website:
What is music? How does it work? Why does it move us? Why are some people better at it than others? In this hour, we examine the line between language and music, how the brain processes sound, and we meet a composer who uses computers to capture the musical DNA of dead composers in order to create new work. We also re-imagine the disastrous 1913 debut of Stravinsky's Rite of Spring through the lens of modern neurology.
It's completely free, and you can either listen online, or download for later listening and portability. Enjoy!