Exformation, an interactive installation inspired by the concept of “exformation,” was developed for a composition by Jesper Nordin performed by the Diotima string quartet and combines musical, luminous and colorimetric scores. Around the musicians, positioned on a technically equipped stage, three aluminium-edged cubes with LEDs mounted on circular rails move and angle their light in keeping with an algorithmic programme based on analysis of the spectrum, timbre and intensity of the music. This sensitive object becomes a total composition, a poetic, digital entity responding to the work played at its centre.