American gamelan materials including aluminum, tin cans, car hubcaps, steel, antique milk-strainers, etc. "American gamelan" may also describe the original music of American ensembles working with traditional instruments. Dennis Murphy is often credited as being the first American to build instruments modeled on those of the Javanese gamelan, circa 1960. This work led to his doctoral thesis at Wesleyan University, entitled "The Autochthonous American Gamelan". Murphy started a gamelan group with his instruments at Goddard College in Vermont in 1967; that group later became the community-based Plainfield Village Gamelan. There have been other American builders of gamelan as well, on both the
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