Gamelan is the general term for Bali's dozen or so instrumental music ensembles. The word is derived from gamel, to handle, and Balinese make a clear distinction between gamelan krawang, bronze instruments, and other kinds of ensembles utilizing bamboo. The distinctive features of Bali's major styles highlight shimmering resonances of gongs, knobbed gong-chimes, and metallophones (with bronze keys suspended over bamboo resonators), ranging four or five octaves, and differing from neighboring Java in their explosive sonorities and phrasings. Gamelan styles are associated with specific contexts of ceremonial, entertainment, or recreational activity.
-Edward Herbst, Dancers of Bali liner notes