The korng thomm plays a melodic line in the Pinn Peat ensemble almost identical to that of the roneat thung large xylophone. The korng thomm dwells more steadily on the pulse without pulling or delaying the beat (melody). The player uses soft mallets for indoor performance, hard ones for outdoors.

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The gong circle-maker creates sixteen bossed gongs made of copper with bronze admixture. He suspends them on rattan frames in a circle around the player (see above). He tunes the individual gongs by dripping into the upturned boss a mixture of mud-lead, rice husks, and beeswax.

The small gong circle, korng tauch, closely resembles its larger relative. The smaller instrument only appears in large ensembles and plays a role similar to that of roneat ek, the small xylophone.