Electro-Harmonix Nano Pog Polyphonic Octave Generator Pedal W/Power SupplyThe Electro Harmonix Nano POG can simultaneously generate multiple octaves from your input signal. Whether you play single notes, arpeggios, or full chords, the Nano POG will precisely track every note or chord that you play. With the Nano POG, you can mix together your dry signal with two different octaves (one above and one below your original note) to create totally new, inspiring tones. Separate level controls for dry, sub octave and octave up