Electro-Harmonix Octave Multiplexer

A really fat and smooth sounding octave box that tracks notes extremely well. It has high and low filter knobs so one can control the overall characteristics of the sound. Add to this a toggle switch to choose between buzzy or deep and bassy, and you've got yourself a rather versatile box. As expected, being an Electro-Harmonix unit, it is an excellent sound warping device.