Mathews and Verplank's idea, and a quietly radical one: take a physical object that vibrates
slowly — a ring of masses on springs, oscillating well below hearing — and read its
shape as a wavetable at audio rate. The pitch you play sets how fast you
scan around the ring; the springs slowly reshuffle the shape, so the timbre
morphs on its own as the note sustains, the way a struck object's tone evolves. Two
independent clocks — audio-rate scanning, sub-audio physics — in one AudioWorklet.
Morph = spring stiffness (how fast the shape churns); settle = how long before it relaxes to a plain tone.
play with your keyboard (a s d f …) or click the keys · hold a note and listen to it move