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Rotary encoders: Raise a Glitch Storm @Raspberry_Pi #PiDay #RaspberryPi

Invented (or discovered) by  Finnish low-tech artist and programmer Ville-Matias Heikkila (aka Viznut), bytebeat is algorithmic music created from one line of code. In other words, auto-created chiptune. Recenty the HackSpace team attempted to create bytebeat with a Raspberry Pi runing python. Here’s more from the Raspberry Po Blog:

A Glitch Storm is a user-influenceable version of bytebeat music. We love definitions like that here at the Bakery: something you have never heard of is simple a development of something else you have never heard of. Bytebeat music was at the heart of the old Commodore 64 demo scene, a competition to see who could produce the most impressive graphs and music in a very limited number of bytes. This was revived/rediscovered and christened by Viznut, aka Ville-Matias Heikkilä, in 2011. And then JC Ureña of the ‘spherical sound society’ converted the concept into the interactive Glitch Storm.

In order to produce music like this on the Raspberry Pi, we need some extra hardware to generate the sound samples, and also a bunch of rotary encoders to control things. The samples are produced by using a 12-bit A/D converter connected to one of the SPI ports. The schematic of this is shown in Figure 1. The clock rate for the transfer of data to this can be controlled and provides a simple way of controlling, to some extent, the sample rate of the sound. Figure 2 shows the wiring diagram of the five rotary encoders we used.

See project!


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