Kraakdoos

A kraakdoos or cracklebox is a custom-made instrument, in the form of a noise-making electronic device.

It is a small box with six metal contacts on top, which generate various unusual sounds and tones when pressed by the performer's fingers.

The human body becomes a part of the circuit and determines the range of sounds possible, thus different people–or the same person at different times–shall generate different results.

The kraakdoos is a simple device, based on a single operational amplifier (one of the earliest models to be produced) and a few transistors, and can be constructed with only a basic understanding of electronics.

The musician Andrew Levine plays the Cracklebox regularly as part of his setup, in which it is the only instrument not dependent on external amplification, and has also experimented with a four-Cracklebox-configuration.