Final answer:
The Javanese gamelan is the Indonesian gamelan used in court music, characterized by its elaborate and refined style, especially prominent in central Java's courts.
Step-by-step explanation:
The Indonesian gamelan used in court music is the Javanese gamelan. A gamelan is a traditional ensemble music of Java and Bali, which typically includes a variety of instruments such as metallophones, xylophones, drums, and gongs; bamboo flutes, bowed and plucked strings. It's a crucial part of the Indonesian cultural heritage. The Javanese gamelan is particularly known for its elaborate and refined style, which has developed over centuries especially in the courts of the central Java and the Yogyakarta and Surakarta regions.