This project is a part of experiments done while doing an artist in residence at Instructables. You can see the other projects here.
Creating emergent patterns that can be converted into sounds fascinates me. So this is my first experiment in building an arduino platform for creating such patterns. This version uses a Gameduino as its sound processor and uses particles that bounces around on a led matrix as the interactive sound generators. You can add more particles by pressing the joystick down for two seconds and the joystick serves as a drawing pen to create elements for the particles to bounce on.
As you can see in the video the code is still a little crude and only the first proof of concept for the platform.
Of similar projects I would recommend you look into: Bloom
an iPhone app made by brian Eno and Otomata