The instrument is made of clay and is usually black. The hun is globular and comes in three main shapes: the egg, the hemisphere and the ball. It has a blowing hole on top and five finger holes, two on the back and three on the front. The is no standard size for the instrument. The hun is played using two hands. The range of the hun is an octave: it can produce all 12 chromatic notes. It has a dark timbre similar to the ocarina.
Usage
It is used primarily in court music ensembles to play aak: ceremonial music to honourConfucius. In these ceremonies, the hun represents the earth and plays together with the ji, a flute. The hun has been used in this capacity since the 12th century. In the late 20th century some contemporary Korean composers began to use it in their compositions and film scores.