posted some Java/Sumatra earlier, here is a proper Balinese double disc. extremely abbreviated version of extensive liner notes from Ocora plus some of my own musings and limited knowledge:
Wayan Lotring, a common household name in Bali and other parts of Indonesia, was a master musician, band leader, and instrument designer responsible for a 1920s revision of court gamelan which became the dominant 20th century sound of Bali. how many times the ancient instrument and art form has been revised in the 10,000+ years of its existence I'm not certain of, but I think the last major wave of adaptations occured roughly 500 years ago, when the tuning was somewhat changed and refined into what we know as modern gamelan. Wayon Lotring also re-worked and modified numerous pieces of traditional music for 20th century audiences, creating a powerful and monumental yet subtle and agile style full of nuance and intricate detail, before passing away in the mid 1980s.
Disc 1 Disc 2