Electro Harmonix Multiplexer - PEDAL SUB-OCTAVE GENERATOR EFFECT

(This text is machine translated) Generates deep bass sounds one octave below the note played. Two separate smoothing filters allow you to get exactly the desired sub-octave signal by separating the Octave Multiplexer from other octave devices. Play your vocals through the Octave Multiplexer and they will sound just like Ike Turner. It is a monophonic device and only works on single notes.