The Karinding is Sundanese traditional musical instrument from West Java, Indonesia.

It is similar to the Jew's harp and are usually made from bamboo and midribs of palm trees.

[1] One places the karinding between one's two lips, then one end is beaten with a finger so that the vibrations occur in the middle.

Then the rhythm of the karinding music is determined by the movement of the tongue and lips, which became the media echo reflector of the vibration.

In summary, its voice sounds like a big frog in the middle of rice fields.