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A single-pitch angklung from Bandung, Indonesia. The angklung is a musical instrument made of a varying number of bamboo tubes attached to a bamboo frame. The base of the frame is held in one hand, whilst the other hand shakes the instrument. This causes a repeating note to sound. The tubes are carved to have a resonant pitch when struck and are tuned to octaves. When single-pitch angklung such as this are used in angklung ensemble, each of the performers plays just one note or more, but together they produce complete melodies.Photograph: Chris Woodrich