Percussa micro super signal processor

Now, here’s the way to do an analog noise generator oscillator: use grains of sand.

As falling sand interrupts the flow of a laser to a light-sensitive sensor (a photodetector), the circuit produces random oscillations of sound. It’s the latest brilliant creation of mad Dutch scientist Gijs Gieskes, the industrial designer-turned-musician whose inventions often center on some physical and mechanical apparatus. Just for good measure, the project is mounted to a clear frame so it can be fit to a Eurorack modular setup.

You can try building this yourself; as with all of Gijs’ projects, the circuit is freely available online.

Laserloper

Photo courtesy the artist.

Like sands through the hourglass, so are the synths of our lives…

Thanks to ferrie=differentieel on Twitter for the tip!