Its body is made from a special type of coconut covered on one end with snake skin, and it has three strings.
By the 1960s, metal strings were in use, and the sound of the instrument changed, becoming sharper.
[1] The tro Khmer is closely related to a Thai instrument called saw sam sai.
The instrument may be related to the similarly shaped Indonesian version of the rebab, arriving there from Muslim culture, c. 15th century a.d.[1] A difference between the two is the number of stings; where the Indonesian rebab has two strings, the tro Khmer has three.
This article relating to instruments of the huqin family is a stub.