The word "panpipes" refers to an instrument that is made up of cane tubes that are tied together side by side. Some of the tubes are open at both ends, and some are only open at the top. The instrument is played by blowing across the tops of the tubes, which are arranged from longest to shortest. (The longer the tube, the lower the sound. The shorter the tube, the higher the sound.) Generally, two musicians each play a set of panpipes together to create a melody. In addition to Peru and other parts of South America, the panpipes are also used in parts of Asia and Europe.