Gamelan music. American folk guitarist John Fahey included elements of gamelan in many of his late-1960s sound collages, and again in his 1997 collaboration with Cul de Sac, "The Epiphany of Glenn Jones." Influenced by gamelan, Robert Fripp and Adrian Belew used rhythmically interlocking guitars in their duets with each other in the 1981–1984 trilogy of albums ("Discipline", "Beat", "Three of a Perfect Pair") by rock band King Crimson and with "The League of Crafty Guitarists". The gamelan has also been used by British multi-instrumentalist Mike Oldfield at least three times, "Woodhenge" (1979), "The Wind Chimes (Part II)" (1987) and "Nightshade"
Gamelan Bali, remarked, "Deviations in what is considered the same scale are so large that one might with reason state that there are as many scales as there are gamelans." This view is contested, however, by some teachers of gamelan, and there have been efforts to combine multiple ensembles and tuning structures into one gamelan to ease transportation at festival time. One such ensemble is gamelan "Manikasanti", which can play the repertoire of many different ensembles. Balinese gamelan instruments are built in pairs that are tuned slightly apart to produce interference beats, ideally at a consistent speed for all pairs of