The Boss Hand Clapper HC-2
is a single-function hand clap synthesizer released in 1984. It sounds similar to the TR-808/909 clap, and uses a variation on the same circuit. White noise is filtered and shaped, and here the user has some control over that: a Dry control determines the brightness of the sound (tone), and a Hall control determines the tail length (reverberation).
The unit can be used alone, with the sound being triggered by tapping the pad, or in conjunction with various drum machines or sequencers. A 1/4″ input jack takes a positive trigger voltage pulse. The strength of the trigger, coupled with the Sensitivity control, determines the volume of the sound.
Read more on Vintage Synth