Pure Data is an open source visual programming language for sound written by Miller Puckette.
https://www.raspberrypi.org/ is a small ARM based computer board.

Here are some workarounds for interfacing with the GPIOs or an Arduino in Pure Data running on a Raspberry Pi.

- Wiring Pi (GPIO and MCP3008)
- Pduino

And here some workaround for soundcards.
- Audio Injector
- PiFi Sound Card

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