ensembles are prevalent throughout Indonesia Singapore and Malaysia, however gamelan is originated from Java, Bali, and Lombok. In the Central Java, gamelan is intricate and meticulously laid out. The central melody is played on a metallophone in the centre of the orchestra, while the front elaboration and ornamentation on the melody, and, at the back, the gongs slowly punctuate the music. There are two tuning systems. Each gamelan is tuned to itself, and the intervals between notes on the scale vary between ensembles. The metallophones cover four octaves, and include types like the slenthem, demung, saron panerus and balungan. The soul of the gamelan is believed to reside in the large gong, or gong ageng. Other gongs are tuned to each note of the scale and include ketuk, kenong and kempul. The front section of the orchestra is diverse, and includes rebab, suling, siter, bonang and gambang. Male choruses (gerong) and female (pesindhen) solo vocalists are common. With the arrival of the Dutch colonisers, a number system called kepatihan was developed to record the music. Music and dance at the time were divided into several styles based on the main courts in the area—Surakarta, Yogyakarta, Pakualaman and Mangkunegaran. Gamelan from eastern Java is less well-known than central or western parts of the island. Perhaps most distinctive of the area is the extremely large gamyak drum. In West Java, formerly Sunda, has several types of gamelan. Gamelan Degung, gamelan salendro and tembang sunda are three primary types. The Osing Javanese minority in eastern Java are known for social music for weddings and other celebrations called gandrung, as well as angklung, played by young amateur boys, which is very similar to Balinese gamelan. In Indonesia, gamelan often accompanies dance, wayang puppet performances, or rituals and ceremonies. Typically players in the gamelan will be familiar with dance moves and poetry, while dancers are able to play in the ensemble. In wayang, the dalang (puppeteer) must have a thorough knowledge of gamelan, as he gives the cues for the music. Gamelan can be performed by itself – in "klenengan" style, or for radio broadcasts – and concerts presentation are common in national arts conservatories founded in the middle of the 20th century. Gamelan's role in rituals is so important that there is a Javanese saying, "It is not official until the gong is hung". Some performances are associated with royalty, such as visits by