A quadruple reed is a type of reed by means of which the sound is originated in various wind instruments. The term "quadruple reed" comes from the fact that there are four pieces of dried palm leaf vibrating against each other, in pairs. A quadruple reed, such as the Thai pinai, operates in a similar way as the double reed and produces a timbre similar to the oboe. The Thai pii chawaa is "sometimes described as having a double reed, though this is actually folded yet again, creating four layers of reed and thus requiring considerable lung power to play".