That’s right, a hacker used a “specially adapted and destabilised FM synthesis circuit disembowelled from a Yamaha PSS-470” to let worms make their own music. Video demonstration after the jump.
As for the machinations behind the pizzazz; a Yamaha FM synthesis board is sensitivised by overclocking it with a painfully high quartz crystal (17 Mhz), various components have either been removed or replaced, and the entire circuit hard wired to run on the lowest possible current/voltage (to avoid the worm getting hurt). The worm was safely returned to its natural habitat