K'ny is the only fiddle of Giarai people. It is a chordophone of bow branch.

The body of K'ny is made from a bamboo tube of 3 cm diameter to maximum, and of 66cm length. A tuning peg is found at the upper part of the body, while at the other end of body, there is a wooden pin served for hanging string. The only metal string is attached to tuning peg and straightly goes to the hanging pin. One end of sympathetic string is closely tied to the main string near the hanging pin, while its other end is fixed after being put through the membrane which is either made of pangolin's scab or flattened buffalo horn. Bow is a hornless bamboo slab of 40 or 45 cm length and made thin at one end.

When playing, instrumentalist holds the membrane in his mouth, and stretches the sympathetic string to an appropriate length, and plays the instrument with bow that is already rubbed with Kochik's resin. The sounds of the metal string impacts on the sympathetic string consequently making membrane vibrated. Palate of the musician thus would be a resonator. The most important reason for magic timbres of K'ny is the simultaneous combination of instrument's sounds and musician's singing voice. K'ny therefore is called among Giarai people the singing instrument.

Regarding pitches, Professor - Dr.Sc. To Ngoc Thanh discusses in his book "Musical instruments of Vietnam's ethnic minorities" that "pitches of actual tones are not standard". The reason can be found in the nature of half-playing and half-singing of the sound making principle. Changes in musician's mouth shape create overtones and stable acoustic waves, and thus results in mystical timbres. Folk artists usually use pentatonic scales. One of pentatonic scales of Giarai is Do¹ - Re¹ - Fa#¹ - Sol¹ - La¹.

K'ny is played exclusively by man, and only performed in communal house, in watch-towers, and in the milpa, as the Giarai people believe that "with mystical timbres, K'ny is the voice of God".