What kind of light controller is used for the christmas lights that flash to the music ?

Making Animated Musical Holiday Lights


http://blogs.msdn.com/coding4fun/archive鈥?/a>


http://www.trossenrobotics.com/store/p/3鈥?/a>





PlanetChristmas!


Build Your Own Computerization


http://planetchristmas.com/BuildYourOwn.鈥?/a>





How to Make Your Christmas Lights Flash to Music


http://www.wikihow.com/Decorate-Your-Fro鈥?/a>





How to: Make Computer-Controlled Christmas Lights


http://www.techeblog.com/index.php/tech-鈥?/a>





http://www.google.com/search?hl=en%26amp;safe=鈥?/a>