TRAPPIST Sounds : TRAPPIST 1 Planetary System Translated Directly Into Music

We used a numerical simulation of TRAPPIST1 to play a piano note every time a planet passes in front of the star (a transit ) and a drum every time a faster inner planet overtakes its outer neighbour (a conjunction ). To assign pitches, we simply scaled up the orbital frequencies by 212 million times to bring them into the human hearing range. The TRAPPIST1 system is a resonant chain which means that the periods of the planets orbits are very close to whole number ratios (ex. 3:2, 4:3). This is exactly