Gamelan slower, more meditative quality than the gamelan music of Bali. Javanese gamelan can be made from iron or brass; instruments made of cast bronze are considered the best quality. Outside the main core on Java and Bali, gamelan has spread through migration and cultural interest, new styles sometimes resulting as well. Malay Gamelan comes from the Javanese tradition through Riau-Lingga which later formed its own distinct identity, using fewer instruments tuned in a near-equidistant "slendro", and often using a western B or C as a tuning basis. Javanese emigrants to Suriname play gamelan in a style close to that found
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