Sound for your eyes

Motion & Visual Design

Personal Project

Undertone is a generative visual design tool that recreates, in real time and directly in the browser, the physical phenomenon of Chladni figures — the patterns sand forms on a vibrating plate, settling along the lines where sound leaves it undisturbed.

The engine analyzes the audio spectrum (bass, mids, voice, transients) and translates that energy into a genuine physics simulation: thousands of particles move by following the gradient of standing wave functions, converging onto crisp nodal lines when the sound allows it, scattering with every peak and beat. A piece of text or an SVG file can act as a "magnet": the sand recomposes into the starting shape during calmer moments and breaks apart into complex patterns during the more energetic passages.


The control panel lets you choose particle shape and size (squares, circles, crosses, motion-oriented lines), a working format (which the preview matches exactly, with no surprises at export time), a color palette, and export the result as high-resolution video with synchronized audio included.



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©2026 Pierpaolo Fabbriani