Quadruple reed

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.

[1] The Arabic 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".

Both options could result in what may be considered a reed of quadruple thickness.

A reed may be folded into the center at 1/4 and 3/4 the length, and then this may be folded in half, with the center being outwards and the four sides being enclosed,[3] making a single reed of quadruple thickness.