  Scientists collaborating internationally have developed a new way to learn
about our universe through gravitational waves, which are ripples in space-time
caused by the motion and vibration of celestial bodies. By analogy,
gravitational waves are akin to the vibrations carried through the air as
sound. Quite remarkably, black holes, which are the densest objects in the
universe formed from dead stars can vibrate and emit gravitational waves at
frequencies that are within the range of human hearing once the gravitational
waves are detected and amplified by instruments such as the LIGO and Virgo
gravitational wave detectors. In this work, we explore how to make musical
instruments based on gravitational waves by mapping a different gravitational
wave pattern to each of the 88 keys of a piano, much like a carillon, which has
its bells mapped to the batons of a carillon-keyboard. We rely on theoretical
calculations for black hole vibrations to construct our digital black hole
instruments. Our software and music samples are freely available to those who
want to explore the music of gravitational waves.
