Phosphor

A free spectral synthesiser. Paint images. Hear sound

Paint sound from scratch

Draw directly onto a spectrogram canvas. Horizontal lines become tones, diagonals become sweeps, clouds of brightness become textures. The frequency axis maps to musical octaves, so what you see is what you hear.

Colour shapes timbre

In colour mode, hue controls the harmonic character of each pixel. Red produces sawtooth-like warmth, green gives square-wave hollowness, blue creates soft flute-like tones. Saturation controls how pronounced the harmonics are.

Turn any image into sound

Load a photograph, painting, or fractal and hear it as audio. The visual composition becomes the musical texture, brightness maps to loudness through a perceptual dB curve.