Wikipedia
Sralai
The sralai is a wind instrument used in the pinpeat of Cambodia. Its quadruple reed is made of palm leaf, and its body has a slightly conical bore. Its cousin, the Western oboe, has a double reed and a conical bore. The pinpeat instruments tune to the sralai's pitch, and the player must learn circular breathing to play continuously without stopping for breath. The sralai is very similar in construction and playing technique to the Thai pi.