Sound being a great design material, digitally and physically.
“One of the underappreciated repercussions of transitioning from a world more concerned with the movement of electrons than of gears, pistons, and flywheels is the elimination of noise. Sound, after all, is vibration propagated through some kind of medium (usually air), so the fewer moving parts there are disturbing the atmosphere around us, the fewer vibrations there are to reach our ears.”