Glass Bead Game III on iPad: a black grid of just-intonation intervals with diamonds where three tones agree, and a column of controls on the left

Glass Bead Game III: playing in just intonation on iPad and Mac

An instrument for playing against a drone on a map of pure, whole-number intervals, with Apple Pencil, keyboard or mouse. Version 3.0 is a complete rebuild.

November 11, 2026 · 3 min