Music is an integral part of Mongolian culture. Among the unique contributions of Mongolia to the world's musical culture are the long songs, one of the greatest features of the Mongolian music, overtone singing and morin khuur, the horse-headed fiddle. The music of Mongolia is also rich with varieties related to the various ethnic groups of the country: Oirats, Hotogoid, Tuvans, Darhad, Buryats, Tsaatan, Dariganga, Uzemchins, Barga, Kazakhs and Khalha.
Besides the traditional music, Western classical music and ballet flourished during the MPR. Among the most popular forms of modern music in Mongolia are Western pop and rock genres and the mass songs, which are written by modern authors in a form of folk songs.
This genre is called "Long song" (Urtyn duu) because each syllable of text is extended for a long duration. A four-minute song may only consist of ten words. Lyrical themes vary depending on context; they can be philosophical, religious, romance, or celebratory, and often use horses as a symbol or theme repeated throughout the song. Eastern Mongols typically use a morin khuur (horse-head fiddle) as accompaniment, sometimes with a type of indigenous flute named limbe. Oirat groups of the Western Mongols typically sing long songs unaccompanied or accompanied with the igil.
The horse-head fiddle, or morin khuur, is a distinctively Mongolian instrument and is seen as a symbol of the country. The instrument has two strings. There is some controversy regarding the traditional carving of a horse on the upper end of the pegbox. Some scholars believe that this is proof that the instrument was originally a shamanistic instrument. The staffs of shamans have a horse similarly carved on top; the horse is a much-revered animal in Mongolia.