The DS-8 was originally designed by Coron in the 80’s to be mounted on to a drum to in order to produce synth percussion sounds. Similar to the DS-7, which contained a VCO +VCA chain.  The LFO modulated the VCO and the decay envelope is triggered by a piezz0 cell.  The Decay Pot is really a release and the VCA is controlled by the LFO.  The DS-8 added a colored noise generator with a balance pot, which allows more hi-hat and snare “sounds” to be achieved.  PC Board measures 5 & 5/8ths X 2 & 5/8ths inches. This PCB is MADE IN THE USA and up to Synthrotek’s fine specs.  The Pots can be through-hole mounted, for an easy build.