What are the two court cities in “the cultural heartland of Central Java”? What type of music is associated with these two cities?

What will be an ideal response?

• Yogyakarta ("Yogya"), also the location of one of Java's two main royal courts and official home of the current sultan, and Surakarta (usually called "Solo") where traditional gamelan music and related performing arts (drama/dance) have "flourished in their most elaborate and refined forms."