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
Gamelan Sekaten are "Kyai Guntur Madu" and "Kyai Guntur Sari". According to Benjamin Brinner, the "gamelan sekaten", exists in halves: divided between the two rival courts in Surakarta and Yogyakorta, each court had a matching second half made. The pitches of the "Sekaten" ensemble is in "pelog", but lower than standard ensembles today. According to Benjamin Brinner it is the lowest pitched, largest, and loudest ensemble in Java. In recent times the gamelan at ISI Surakarta commissioned a special "Sekaten" set that would be compatible with their other gamelan, to be used in new experimental compositions. Historically, the "Sekaten" ensemble is notable