The Angklung is a musical instrument made of two bamboo tubes attached to a bamboo frame. The tubes are carved to have a resonant pitch when struck and are tuned to octaves. The base of the frame is held in one hand, whilst the other hand strucks the instrument. This causes a repeating note to sound. Each of three or more performers in an angkalung ensemble play just one note or more, but altogether complete melodies are produced. The Angklung is popular throughout Southeast Asia, but it originated in today's Indonesia and has been played by the Sundanese for many centuries.