Researchers working with the Tsimané of the Amazon found that tribe members could tell the difference between consonance and dissonance but took them to be equally pleasant, giving credence to the idea that Western preference for consonance is not biological. “The Greeks were really into ratios,” speculated the lead researcher. “It’s possible they started making music that way and we’ve been stuck with it ever since.”

Before the nineteenth century, a conductor’s baton was a baseball-bat-size implement that was banged against the floor to keep time. This could be dangerous. In 1687, while conducting a symphony playing Te Deum for Louis XIV, who had just recovered from serious illness, composer Jean-Baptiste Lully accidentally struck his foot with his baton, causing inflammation in his toe. He refused amputation, and an infection spread, killing him two months later.

The medieval Occitan troubadour known as the Monk of Montaudon was a master of the enueg, “song of annoyance.” “I can’t stand a long wait,” he complains in one composition, written around 1200, “Or a priest who lies and perjures himself / Or an old whore who is past it, / And—by Saint Delmas—I don’t like / A base man who enjoys too much comfort.” The song goes on in this fashion for nine more verses.

Irving Berlin composed most of his songs in F-sharp major; the six sharp notes in the scale meant he could play the black keys of the piano almost exclusively. Eventually, for purposes of technical variety, he had a lever mechanism installed that allowed him to modulate into other keys without changing his playing.