What is the fine-grained topic of the following text: Composer Tigger Benford creates a polyrhythmic score based on Javanese gamelan musical structures and using amadinda, marimba, shakuhachi flute, piano, hand drums, bells, gongs, and conch shell with text written by Benford and sung by the cast. Only return the topic.
Tigger Benford's polyrhythmic score based on Javanese gamelan music