2000s Pigtronix Tremvelope

analog, high-fidelity optical circuit design by Howard Davis. It runs internally at 18V DC (original PSU included), providing significant headroom and clarity. Controls include Speed, Depth, & Sensitivity which provide the basis for the depth and response of the internal envelope as well as toggles for the selected waveform, speed + depth intensity switches that cancel out modulation in the mid position, and Acceleration which adjusts the Tremolo response time. The pedal's i/o features stereo output, expression pedal input, and a trigger input for keeping the pedal in time with external gear like drum machines.