Tungso

The tungso (Korean: 퉁소; sometimes tongso, transliteration of its Chinese name of dòngxiāo) is a Korean notched, end-blown vertical bamboo flute used in Korean traditional music. It is similar to the danso, but longer and larger. The hanja tong (洞) was used to describe the shape of the instrument that resembles a long cave.

The instrument is parallel to the Chinese xiao, and equivalent to its variant, dongxiao, and the Japanese name is shakuhachi. A distinctive feature of the tungso, unlike other vertical flutes is that it may have a buzzing membrane, similar to that of the Korean transverse flute, the daegeum. This is especially common in the folk variety of the instrument.