This document classifies traditional Thai musical instruments into four categories: 1) Idiophones include the ranat thum metallophone, khawng wong lek gong circle, and khawng wong yai larger gong circle. 2) Membranophones such as the taphon double-headed drum and ramna shallow drum. 3) Chordophones like the jakhae crocodile-shaped string instrument and saw sam sai triangular string instrument. 4) Aerophones including the pi wind instrument and khaen bamboo mouth organ.