A gangsa is a type of metallophone

Metallophone

A metallophone is any musical instrument consisting of tuned metal bars which are struck to make sound, usually with a mallet.Metallophones have been used in music for hundreds of years. There are several different types used in Balinese and Javanese gamelan ensembles, including the gendér, gangsa...

 which is used mainly in Balinese

Balinese people

The Balinese population of 3.0 million live mostly on the island of Bali, making up 89% of the island's population. There are also significant populations on the island of Lombok, and in the eastern-most regions of Java The Balinese population of 3.0 million (1.5% of Indonesia's population) live...

 and Java

Java

Java is an island of Indonesia. With a population of 135 million , it is the world's most populous island, and one of the most densely populated regions in the world. It is home to 60% of Indonesia's population. The Indonesian capital city, Jakarta, is in west Java...

nese Gamelan

Gamelan

A gamelan is a musical ensemble from Indonesia, typically from the islands of Bali or Java, featuring a variety of instruments such as metallophones, xylophones, drums and gongs; bamboo flutes, bowed and plucked strings. Vocalists may also be included....

 music. In Balinese gong kebyar styles, there are two types of gangsa typically used: the smaller, higher pitched kantilan and the larger pemade. Each instrument consists of several tuned metal

Metal

A metal , is an element, compound, or alloy that is a good conductor of both electricity and heat. Metals are usually malleable and shiny, that is they reflect most of incident light...

 bars (either iron or bronze) each placed over an individual resonator. The bars are hit with a wooden panggul, each producing a different pitch.