The danso (also spelled tanso) is a Korean notched, end-blown vertical bamboo flute used in Korean folk music. It is traditionally made of bamboo, but in 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 dan… (More on Danso)