The Electro-Harmonix POG is a polyphonic octave generator. With the POG you can add one octave up, two octaves up, and one octave down from your original guitar signal and blend them all together - plus it works on strummed or arpeggiated chords! Want your guitar to sound like a 12 string? The POG can do it, especially with controlled detuning - or even make it sound like an 18 string. Easily generate the sound of a drawbar organ. Make your guitar sound like a bass guitar.