What I'm listening to today: "メトロノーム同期 (32個)", Ikeguchi Laboratory, Tokyo University of Science
This is an entirely physical effect. Place two or more metronomes on a table and start them at different times. The metronomes will acoustically couple through the table and gradually interfere with each other until their oscillations move into perfect alignment.
You might have heard of this trick before! But try just listening to it. Like really listen
