f × 2⁴⁰ → λ = c / f

Every note, raised forty octaves,
is a color.

Double a pitch and you get the same note an octave up. Double A 440 Hz forty times and you get 484 THz — an electromagnetic frequency whose wavelength is 620 nm: orange light. This instrument listens to your song, shifts every frequency into the visible band, and shows you the result — as light, and as the standing-wave geometry a plate of sand would form.

Drop a song here or click to choose a file

mp3 · wav · m4a · ogg — analyzed locally, never uploaded

0:000:00

No file handy? Strike a note — each button wears its own 40-octave color

Or strike a chord — several notes, several wavelengths, one combined light

Or open the microphone — sing, whistle, hold it to a speaker

The plate

CENTER-DRIVEN PLATE · RINGS & PETALS · EVERY SOUNDING NOTE

The chord, as light

Play something — every note that sounds appears here with its own wavelength, and the swatch above mixes them additively, the way light combines.

Tune the plate

GRAIN · DRIVE · AFTERGLOW

Grain size 1.0 Grain count 7000 Vibration punch 1.0× Afterglow off Notes on plate 4 Pattern detail 1.0×

The painting

FULL SPECTRUM, IN ITS MAPPED COLORS, OVER TIME

Honesty clause. Sound is a pressure wave in air; light is an electromagnetic wave. They are different physical phenomena, so a note has no literal “true” color — but the mapping here is not arbitrary either. The visible band spans almost exactly one octave (~400–790 THz), so when each pitch is doubled until it lands inside it, every note name claims one unique hue, and harmony in sound becomes harmony in color. The plate patterns are real physics: standing waves on a center-driven plate — the speaker cone pumps energy in at the middle, waves radiate outward, and sand gathers on the still rings and petals between them, the same way salt behaves on a subwoofer.