We unlock the door to the school gym - a small hall that doubles as a classroom - and Jehue's face bursts into an open grin.

BBC: London calling for young hurdler Jehue Gordon

It's not often that we stumble upon classical music on the floor at SIGGRAPH, so the tune of Bach's Cantata 147 was reason enough to stop by Gocen's small table in the annual graphics trade show's Emerging Technologies hall.

ENGADGET: Gocen optical music recognition can read a printed score, play notes in real-time (hands-on video)