Bali's most popular ensemble is still the large gamelan gong, consisting of 25 to 30 musicians. The principal melody instruments are metallophones, xylophone-like instruments with bronze keys. Sets of small, tuned gong kettles provide melodic ornaments, while the penetrating bass tones of great gongs punctuate larger phrases. Clashing cymbals add to the overall glitter. A flute or stringed instrument sweetens the melody. The entire structure is supported by two drummers, who create the crucial rhythmic underpinning. The kecak is uniquely Balinese. The rhythmic interlocking "tjak-tjak-tjak-tjak," chanted by a large group of male voices, originated as the accompaniment to an ancient trance dance. It is a performance of the Ramayana, where the monkey hordes come to the aid of King Rama in his battle with the evil King Rawana. The 80 members of the Sekaha Ganda Sari are heard in this kecak performance. 　　 　　 From the Pura Paku Alaman, Jogyakarta. K.R.T. Washington, director. Recorded in Java by Robert E. Brown. Originally released in 1989.