A percussion system for a percussion instrument, comprising: a cymbal or other percussion mechanism; an upright elongated support; a base frame from which the support extends upwardly; a drive linking system movable to actuate the sound generating mechanism; and a foot-operated pedal assembly. The first op amp functions as a differentialbuffer amplifier, which improves temperature performance. A pre-defined code characteristic can include desirable correlation, or spectral properties. A request processing thread processes a SOAP request according to the business logic of the WSA.