Nay

Ney or Nay is a woodwind Persian musical instrument. It’s a knotgrass flute with six finger holes; Five are over Nay and the other one is set by thumb. As the air is blown through Nay, the sound will be heard.

The edge of Nay is held between front teeth. And the stream of air gets direction with tongue, this sets the sound pitches. The technique is not very easy but once learned, it makes pure tones of sounds. The range is about two and a half octaves.