Traditional Korean musical instruments comprise a wide range of string, wind, and percussion instruments. Many traditional Korean musical instruments (especially those used in Confucian ceremonies) derive from Chinese musical instruments. String Korean string instruments include those that are plucked, bowed, and struck. Most Korean string instruments use silk strings, except as noted. Plucked Zithers Gayageum (hangul: 가야금; hanja: 伽倻琴) – A long zither with 12 strings; modern versions may have 13, 15, 17, 18, 21, 22, or 25 strings Geomungo (hangul: 거문고) – A fretted bass zither with six to eleven silk strings that is plucked with a bamboo stick and played with a weight made out of cloth Cheolhyeongeum (hangul: 철현금; hanja: 鐵絃琴) – A geomungo with 8 steel strings plucked with a bamboo stick and played with a slide made out of either glass or metal in the manner of a slide guitar, developed in the 20th centuryphoto 1photo 2 Daejaeng (hangul: 대쟁; hanja: 大筝) – A long zither with 15 strings, slightly larger than the gayageum; it was used during the Goryeo period but is no longer usedphoto Seul (hangul: 슬; hanja: 瑟) – A long zither with 25 strings, derived from the Chinese se; used today only in Munmyo jeryeak (Korean Confucian ritual music)photo Geum (hangul: 금; hanja: 琴) – A 7-stringed zither, derived from the Chinese guqin; also called chilheyongeum; used today only in Munmyo jeryeak (Korean Confucian ritual music)photo Ongnyugeum (hangul: 옥류금; hanja: 玉流琴) – A large modernized box zither with 33 nylon-wrapped metal strings, developed in 1973; used only in North Korea (pronounced ongryugeum in North Korea)photo 1photo 2photo 3 Harps Gonghu (hangul: 공후; hanja: 箜篌) – Harps (no longer used). There were four subtypes according to shape: Sogonghu (hangul: 소공후; hanja: 小箜篌; literally "small harp") – harp with angled sound box, 13 strings, and a peg that is tucked into the player's beltphoto Sugonghu (hangul: 수공후; hanja: 豎箜篌; literally "vertical harp") – vertical harp without sound box and 21 strings photo Wagonghu (hangul: 와공후; hanja: 臥箜篌; literally "lying down harp") – Arched harp with a large internal sound box and 13 strings, similar to Burmese saung gauk photo Daegonghu (hangul: 대공후; hanja: 大箜篌) – large vertical harp with 23-strings Lutes Bipa (hangul: 비파; hanja: 琵琶) – A pear-shaped lute with five strings (hyangbipa or jikgyeongbipa) or five strings (dangbipa). Uncommon today; most modern recreations are modelled on the Chinese pipa Wolgeum (hangul: