The Toba and Karo from North Sumatra developed complex instrumental traditions. The Toba, one of the few societies to use tuned drums to carry a melody, combine them with gongs and oboe-like instruments, creating dynamic melodies and rhythms. The Karo ensemble features expert drumming full of snaps and pops. The Ono Niha people from the island of Nias perform ornate choral songs called hoho, which use only four tones and embody their oral tradition. Unknown outside of Indonesia, these 1990 digital recordings include extensive notes. 72 minutes. "Its varietyin sound, feel, and purposeis astonishing and inspiring." Rhythm Music