Every human culture makes music.
It makes people happy or sad, calm or angry. It is used for work and play, for education and celebration. The variety of music found cross-culturally suggests a deep human need to create, perform and listen to music. One important reason, she and other psychologists believe, is that we have certain expectations about what will follow next in the melody. The emotional response to a melody depends on whether, when and how the expectations are fulfilled, Krumhansl suggests.