Every sound has a color.
CHROMA listens with 88 constant-Q filters — one per piano note — and maps what it hears onto the circle of fifths, where harmony becomes hue. Related keys sit on neighboring colors; dissonance sits across the wheel. Watch music paint itself, or use the same engine to tune, drone, and drill.
Listen like a piano
A constant-Q filterbank gives every note its own analysis window — long enough at the bottom of the keyboard to truly resolve an A0, short and fast at the top. No FFT smearing across low semitones.
Harmony becomes hue
The twelve pitch classes are arranged by fifths around the color wheel. A key change drifts the color; a tritone flips it to its complement. The color you see is the harmony you hear.
One engine, many views
The same analysis drives everything: spectrogram, 88-band note detail, key and chord detection, Fourier epicycles that redraw your sound as spinning circles — and a ±3¢ tuner.
Watch sound become color
Live microphone, audio files, or MIDI — including an on-screen keyboard with a built-in synth. Ten synchronized views from raw waveform to spinning epicycles, with live key and chord readouts.
Open →Perform your palette in color
Play a MIDI instrument (or the on-screen keys) and watch every note stream upward from the keyboard in its saved palette color — capture an instrument's 88-note palette in the analyzer first, then perform.
Open →