Danso fingering chart (all pitches sound one octave higher than written)
The danso (also spelled tanso) is a Korean notched, end-blown vertical bambooflute used in Korean folk music. It is traditionally made of bamboo, but since the 20th century it has also been made of plastic.
The instrument is derived from the Chinese xiao and is used as an educational tool in Korean primary schools, much like the recorder is used in western nations.
The flute has four finger holes and one thumb hole at the back. The playing range is two octaves, going from low G to high G. The lower sounds are made by just blowing, whereas the higher ones are made by difference in the strength of the blowing.
The dan in the instrument's name means "short," and so refers to the notched, end-blown vertical bamboo flute. Another Korean end-blown vertical bamboo flute, the tungso (Hangul: 퉁소; hanja: 洞簫), is longer.