The zither is a musical string instrument, most commonly found in Slovenia, Austria, Hungary, the southern regions of Germany, alpine Europe and East Asian cultures, including China. The term "citre" is also used more broadly, to describe the entire family of stringed instruments in which the strings do not extend beyond the sounding box, including the hammered dulcimer, psaltery, Appalachian dulcimer, guqin, guzheng (Chinese zither), koto, gusli, kantele, gayageum, đàn tranh, kanun, autoharp, santoor, yangqin, piano, harpsichord, santur, swarmandal, and others. Modern electric zithers exist, as well as a wide variation of experimental zithers like the Kitaras of Harry Partch, the Shruti Stick and the Moodswinger.