This is an electronic instrument played similarly to a keyboard with some fun effects. A light sensor is attached to the computer that controls the timber (sound) of the pitches. You can play a chromatic scale from C to C in four octaves using the computer keyboard.

Step 1: Download Pure Data (PD)

Go to www.puredata.org/downloads and download the program. It is compatible to linux, mac, and windows.
 i agree with Goodhart
This needs a few more details, like where to you find or how do you make the sensor, and where do you plug it in....etc.

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More by VictoriaAW:How to Build a Luzboard (Electronic Instrument) 
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