In contrast, western fiddles (such as the violin) are played with the bow pushing on each string from the outside, as is also the case with the tro khmer.

[1][2] The resonator bowl is constructed from a round-bodied coconut shell that has one end covered with animal skin, such as snake or calfskin.

[1] It is similar to the Thai saw u, Vietnamese đàn gáo and the Chinese yehu, although the latter instrument has a wooden rather than animal skin face.

[2] The tro ou chamhieng (ទ្រអ៊ូចំហៀង) is played "exclusively" by Cham who live in Cambodia and has a sound-bowl resonator made from a turtle shell.

On the body of the golden tortoise shell, there is a small piece of bamboo about the size of a big toe, about 0.65 cm long.

At the beginning of this bamboo segment, there are two rods to pull the rope called two kanyi pegs.

It is made from black wood but more basic materials were used, such as a hollow bamboo and a tortoise shell.

It is used in Cambodian classical music ensembles, the arak, kar, mohori and ayai.

[1] It is used in Cambodian classical music ensembles, the arak, kar, mohori and ayai, as the lead instrument.

[6] Its two metal strings are tuned D—A, an octave above the tro sau thom and the highest of the tros.