Central Javanese music is almost synonymous with gamelan. This is a musical ensemble typically featuring a variety of instruments such as metallophones, xylophones, drums, and gongs; bamboo flutes, bowed and plucked strings, and vocalists may also be included. The term refers more to the set of instruments than the players of those instruments. A gamelan as a set of instruments is a distinct entity, built and tuned to stay together — instruments from different gamelan are not interchangeable. However, gamelan is not typically Central Javanese as it is also known somewhere else.
Contemporary Javanese pop music is called campursari. It is a fusion between gamelan and Western instruments, much like kroncong. Usually the lyrics are in Javanese, but not always. One notable singer is Didi Kempot, born in Sragen, north of Surakarta. Didi Kempot mostly sings in Javanese.
source by en.wikipedia.org/wiki/Central_Java#Architecture