Gamelan with male groups. In the twenty-five countries outside Indonesia that have gamelan, music performed in a concert context or as part of ceremonies for expat communities may also accompany dance or "wayang". The tuning and construction of a gamelan orchestra is a complex process. Javanese gamelan use two tuning systems: "sléndro" and "pélog". There are other tuning systems such as "degung" (exclusive to Sunda, or West Java), and "madenda" (also known as "diatonis", similar to a European natural minor scale). In central Javanese gamelan, "sléndro" is a system with five notes to the octave, with large intervals, while "pélog" has
Indonesian art "[[gambuh]]" and "[[topeng]]", Javanese "[[wayang wong]], [[ketoprak]]" and "[[ludruk]]"; Betawi "[[lenong]]"; Sundanese "[[sandiwara]]"; also colonial "[[toneel]]". [[File:Wayang Kulit - Museum Wayang 02.jpg|thumb|right|Indonesian Javanese "[[wayang kulit]]" shadow puppet.]] "Wayang" refer to a theatrical performance with puppets or human dancers. When the term is used to refer to kinds of puppet theatre, sometimes the puppet itself is referred to as "wayang." Performances of [[Shadow play|shadow puppet]] theatre is known as "wayang kulit", are accompanied by a "[[gamelan]]" orchestra in [[Java (island)|Java]], and by "[[Gamelan gender wayang|gender wayang]]" in [[Bali]]. It has been developed into a complete and refined artform, especially in Java