Don't Trust a Theory You Cannot Sing:
Mohler's post on evolutionary psychology's attempt to explain music is excellent. Read the whole thing which concludes with:
"The Christian believes that God created music as a gift to His creatures, and as a means for us to offer true worship. The evolutionist's argument for the meaning of music is as sterile as their argument for the meaning of life. No wonder there are no great evolutionary hymns. Don't trust a theory you cannot sing."