Maybe somebody of You heard about indonesian Gamelan, or You are from Indonesia and maybe know this tradition very well. Gamelan is music played mostly by percussion musical instruments, mainly metallophones and some drums too. There are also some bamboo flutes and string musical instruments, but Gamelan is characterized mainly by those metallophones.
There are two popular traditions of Gamelan known in the West, Balinese and Javanese.
Balinese gamelan is very wild and hilarious with rapid rhythms:
In contrast, there is also Javanese gamelan, which is more meditative with slower rhythms: