performance played with four kinds of instruments, Kweng-ga-ri,
Jang-gu, Book, and Jing. "Sa" of Samoolnori means "four", the number of instruments
used in it.
Samoolnori is a folk music and the players show their
free skills during the performance. The sounds
of the four instruments are mixed together and the same
melody can be sounded in different ways according to
the combination of the sounds of instruments.