"This is a solid-state Tesla coil. The primary runs at its resonant frequency in the 41 KHz range, and is modulated from the control unit in order to generate the tones you hear... So just to explain a little further, yes, it is the actual high voltage sparks that are making the noise. Every cycle of the music is a burst of sparks at 41 KHz, triggered by digital circuitry at the end of a "long" piece of fiber optics.... What's not immediately obvious in this video is how loud this is. Many people were covering their ears, dogs were barking..."
- found on youtube: demjp8RqDA
Joe DiPrima and Duck demonstrate, explain the technical details, and tell the history of the Solid State Musical Tesla Coil
"The LED-s Urban Carpet is a portable interactive installation using a non-traditional user interface. The installation represents a game with a grid of lights that can be embedded as a carpet into the urban context. A pattern of lights is generated dynamically that change in real time according to pedestrians movement over the carpet. In this case the pedestrians become participants that influence the generative process and make the pattern of LEDs change with the change of the location of one or more participants... ...This program is written using a Boid algorithm to simulate a flock of seagulls that follow the pedestrians as they move in different directions over the carpet." - interactiveinstallations.blogspot.com
"Building a WSG [Weird Sound Generator], while fun, is not a deeply scientific or religious experience. The WSG does not look or work at all like a synthesizer used by anyone whose name rhymes with either Cakeman or Bemerson. The WSG does not have a keyboard, it has a few knobs and switches. Do not expect to use the WSG in concert. The WSG makes mildly entertaining, droning beeps and boops... This is not even a shadow of a real music synthesizer but merely a fun little noise maker. It is designed to be built on a solderless breadboard and experimented with or put on a proto-board or PCB and placed into an outlandish case for fun by electronics hobbyists." - musicfromouterspace.com