Description: The koni, is a bowed-instrument from Vietnam, only having two strings, and is only found in Vietnam. It is believed to be originated from the Jarai people who are a minority group in Vietnam, known to possess a single-stringed bowed instrument [called a "abel"]. The Koni does not possess a sound box nor` another form of resonator; however this instrument does have two pieces of string, threaded through a metal disc having two holes. When this disc is played or more properly held in between the teeth or just at the gums in the mouth. The sound changes are achieved by precise vibrations and change when the tongue applies pressure to the metal disc during performance. This modern form of Koni is associated with a small number of musicians at the Hanoi Conservatory of Music.

Construction: The koni usually has two strings, a single thread attached to a metal disc for resonance. In which when the koni is played the mouth of the musician behaves like the sound box rather then the usual affixed sound box of many instruments. This does lead to the uniqueness of the Koni in regards to stringed instruments. Both in playing technique, sound and so on. The bow of the koni like the Chinese Erhu goes in between the strings although they are not related. A screw is affixed into the base of the instrument in which holds the the strings together.