Bach, Mozart or rather JazzHow pieces of music by different composers and genres develop can be anticipated for different periods of time Compositions by Johann Sebastian Bach are less predictable than those by Wolfgang Amadeus Mozart. And how a jazz piece develops can be anticipated even less. This is what two physicists from the Max Planck Institute for Dynamics and Self-Organization in Göttingen discovered when they used over 550 pieces of classical music and jazz to investigate the extent to which a piece of music raises expectations about its future course.