“The tenacious timepiece seems to have ticked through time immemorial, but its form and application to musical life were hundreds of years in the making, beginning with the 16th-century scientist Galileo’s discovery of the pendulum’s isochromism: regardless of amplitude, the pendulum will take about the same amount of time to complete one period, or back-and-forth swing. This discovery could be applied to timekeeping, Galileo realized.”