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After hearing synth-like tones from LED message signs with the sound camera, I wondered if an interesting synthesizer could be designed using LED matrix displays.
A 5×7 LED display matrix is modulated by two manually-tuned oscillators that drive the X and Y axes of the display. A photosensitive stylus is used to play the display via motion in the space above it. Up and down movement adjusts the volume and blend. Small gestures result in changes in timbre, volume, and rhythm.
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