 There are roughly two gong ensemble traditions among Austronesians, which also produced gongs in ancient times.In western Island Southeast Asia, these traditions are collectively known as Gamelan, being centered on the island of Java in Indonesia.It includes the Celempung of the Malay Peninsula, Talempung of northern Sumatra, Caklempung of central Sumatra, Chalempung of southern Sumatra, Bonang of Java, Kromong of western Kalimantan, Engkromong of Sarawak, and Trompong of western Nusa Tenggara.