Alec Connolly, who attends the University of Toledo majoring in electrical engineering, has recently been interning at a company called iHeartMedia. He was tasked by one of the directors with creating a Christmas light show that would sync with their radio station, WRVF(FM), “101.5 The River”. So he took a Raspberry Pi 2 (well, actually, from the images here it looks like he used an original model Pi, but I could be mistaken), some relays and some strings of multi-coloured LEDs and set to work. He used a piece of software called LightShow Pi to do the audio-to-light pattern conversions. They now have two different displays at two offices. You can read more here and see a demo of it in action below: