From an interview with Bert Schiettecatte about AudioCube by David Zicarelli. Bert Schiettecatte is the founder of Percussa, a music hardware and software company located near Leuven, Belguim. The company’s first product is the unusual controller system called Audio Cubes.

DV: If someone asks you to explain what the AudioCubes are, what’s the first thing you say?
BS: A tool for creating and performing electronic music and sound, which aims to stimulate creativity and lower user interface barriers.
DV: Can you give me an example of the kind performing interface I can make?
BS: If you use the AudioCubes out of the box as a MIDI controller, you can map relationships between the cubes and distances to trigger and continuous controller information. For example, you can use a pair of cubes and let one cube detect where the other cube is and send a trigger when that changes. If the cube is on the left of the other one, play MIDI note C4, and if it’s on the other side you could play note C5. You can sense the distance to your hand also and map that to a continuous controller value. Of course this is not the limit, the cubes are configurable however you want to use them.If you want to use it within Max/MSP you have an external available which lets you communicate with the cubes over USB. The configuration patches are available when you buy your set of AudioCubes, so you have an example of how to use the external.
You can send the cubes simple commands like change colour, set behaviour, set parameter, etc.

For more information on Audio Cubes, go here ; to finish reading the interview, go here.