Digit developed a technology so users were could write on the walls with a custom made 'virtual spray can', the movements tracked via ultrasound. The movements were back projected onto glass panels, creating a virtual graffiti wall and the sensation of writing in 'light'. In real time the movements affect and create sounds.
The three panels each have a unique sound effect. The first changes the pitch along the Y axis (from your initial registration point) and adds layers of sound loops dependent on acceleration. The second layers a number of sounds loops together depending on acceleration. The third constructs at random a beat pattern from a number of libraries. It then plays this forwards and backwards depending on direction along the X axis. The speed of playback is connected to the acceleration so for example is the user "scribbles" back and forth you will hear a "DJ scratching" effect.
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