Daegeum

Daegeum, a large transverse flute, dates back to the 7th century Silla. It is one of three transverse flutes, the large daegeum,
the medium-sized junggeum, and the small sogeum.
Daegeum has one blowing hole, six finger holes, and an extra hole covered with a thin membrane.
It produces a distinctive buzzing sound that is refined and calm.