The Electro-Harmonix Micro Synthesizer is an all analog guitar synthesizer effects pedal that lets players create a wide range of classic and experimental synth textures with a guitar signal. It has four independent voices including guitar, octave up, sub octave and square wave that can be blended together and modified with an envelope and resonant filter. Ten slider controls on the top panel let the user shape voice mixes filter sweep direction and speed resonance and attack delay for diverse synth sounds. True bypass switching preserves the original guitar tone when disengaged and the pedal is built in a sturdy die cast chassis.