A lamellaphone is a musical instrument that consists of metal tines fixed at one end over a sound box. Striking the tines creates sound. It's normally a simple instrument, but Gary Warner's is anything but. His remarkable Social Lamellaphone is an interactive art installation that was on display in Sydney, Australia last month.
Warner made the 270 tines from the bristles of mechanical street sweepers. They are cut at different lengths to produce different notes and fixed over a circular arrangement of sound boxes. The tonal patterns move in sequence and are repeated five times over the circumference of the instrument, so it's actually five instruments that people can play together.