Monophonic Analog Synthesizer with AR Enveloping

Chris Woodall | 2013-04-21

This Monophonic Analog Synthesizer was designed by Christopher Woodall and Benjamin Havey. The synthesizer uses a homemade linearly actuated potentiometer as its input, a long with a button for articulation. The potentiometer voltage is fed through a linear to exponential converter and then a voltage controlled oscillator. The output of the VCO is then put through a analog multiplier designed using an opamp and discrete transistors which envelopes the square and triangle wave VCO outputs with a attack release (AR) envelope. The enveloped output is then filtered, amplified and pumped through speakers. Each piece of the synthesizer was simulated in LTSpice and then built on a breadboard.