Quena: 

The quena (also "qina"; sometimes written "kena" in English) is the traditional flute of the Andes. Usually made of bamboo, it has six 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 eliptical notch cut into the end.