The XOMUS (or khomus) is a jaw harp, also known as a Jew's harp. The metal xomus used in Tuvan music is called the demir-xomus. The instrument consists of a flexible metal tongue attached to a frame. The frame is held against the performer's teeth, and the metal tongue is plucked with the finger to produce a note. The xomus is a one-pitch instrument, but the player, by changing the shape of his mouth and the flow of air, creates melodies by emphasizing various overtones. Ayan Shirizhik is pictured playing the xomus.