Using the distance sensors on the audio cubes, I'm controlling synth parameters with one cube to "shape" the sound with my hands, then using another as an "exciter" to make the sound happen by waving my hands in front. Much as a violin needs a bow to excite the string to vibrate, and a flute needs air to make its sound, this synth I programmed in Cycling '74's Max/MSP (based on CNMAT's "resonators" object), relies on a virtual breeze from my hands to make sound.
This video was originally made for an article for createdigitalmusic:
createdigitalmusic.com/2008/05/20/hands-on-audiocubes-as-alternative-controller-for-music-and-visuals/