Gayageum is a typical Korean string instrument. Its origin is traced back to the period of three kingdoms, whose chronicles reported that Gaya’s King Kasil ordered a famous musician, Uruk, to create it. As the kingdom of Gaya dwindled in power, Uruk moved and brought the instrument to Silla. From there, it expanded as a popular musical instrument throughout Korean history?unified Silla, Goryeo Dynasty, and Jogeon Dynasty periods?and is still played today. The instrument can be classified into two types of genres: Jeong-ak (court music) and San-jo (folk music).
25-String Gayageum is another modified form of the gayageum, in which the number of strings increased from the original 12 to 25. Like the 18-string gayageum, the strings are made of nylon. Playing the instrument requires extensive technique, and performers use both hands across a wider range.
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