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Patrick Sébastien Coulombe’s Guitare à crayon project allows the user to create visual art and music with one instrument. The custom USB device makes use of Pure Data to generate sound and Gimp software handles the visual element. The feature list includes –

  • Accelerometer X-Axis (for example controlling the octave)

  • Accelerometer Y-Axis (for example controlling an effect)
  • 6 analog strings giving around 10 bits of resolution
  • External input: 1 analog, 1 digital
  • 4 positions switch
  • 8 buttons
  • 4 pots
  • 1 piezo with velocity filter (for example trigging any sound)
  • 1 ir distance sensor (+-6cm – +-20cm)
  • 1 unuseful led (for tapping the bpm)
  • Pressure-sensitive tablet
  • Foot controller (using a led & a photoresistor)
  • Foot switch (looper, change sound, …)

The maker is currently accepting donations to further develop the project. Relevant schematics and source available on the project’s site. [via Synthtopia]