What is meant by functionalism in music?

Functionalism
in music is a school of thought that indicates that every piece of music has a function and that
that function affects the end product. The roots of functionalism are steeped in the fact that
music can be viewed as a form of nonverbal communication used to express emotions or convey a
specific message. The tempo, genre and even the instruments used are all a function of the
emotion that the composer...