Comma Pump

A long-form generative piece in adaptive 5-limit just intonation. Every chord is voiced with pure ratios; every root motion is a pure interval — so the progression accumulates the syntonic comma (81/80, ~21.5 ¢) downward per cycle, drifting away from home indefinitely. Toggle to 12-TET to hear the beating appear; back to JI and it vanishes — that contrast is the point.