Indonesia is culturally diverse and is home to hundreds of forms of music, with those from the islands of Java, Sumatra and Bali being the most frequently recorded. The best-known traditional or classical music from Central/East Java and Bali is the Gamelan.
Keroncong is said to have its roots in Portugal, brought to Indonesia by Portuguese traders in the 15th century. Most popular in the 20th century, keroncong is now often considered "old people's" music. The most revered keroncong composer is Gesang. A more modern form of keroncong is called Pop Keroncong with Hetty Koes Endang as one of the most versatile singers. In addition, there are regional variations such as Langgam Jawa, which is most popular in Central Java and Yogyakarta.
In West Java popular musical styles include Angklung, played with bamboo instruments and Degung.