The quena (, sometimes also written "kena" in English) is the traditional
flute of the
Andes. Usually made of
bamboo, it has 6 finger holes and one thumb hole and is open on both ends. To produce
sound, the player closes the top end of the pipe with the flesh between his chin and lower lip, and blows a stream of air downward, along the axis of the pipe, over an elliptical notch cut into the end. It is normally in the key of G, with G being the lowest note (all holes covered)
See more at Wikipedia.org...