Gijs Gieskens is a Dutch VJ and musician who likes to make his own tools, both on the hardware and the software side. Browser Jockey is one of his projects, he wrote a set of browser scripts which he uses to generate visuals to live music. Gijs developed another tool to use with Browser Jockey: the Beat Converter. This is a little piece of hardware which translates live mucis to key presses and trigger the Browser Jockey scripts. This video explains it all.