Demeter Fuzzy Octovulator FZO-1 pedal offers the classic octave tone of the sixties without the noise and instability, coupled with the tones from the Demeters Fuzzulator pedal. The unit has a 1.5 dB gain in the octave mode. All the player needs to do is push the footswitch and the octave is engaged. There is a blue LED to indicate the octave is on. There is a factory preset balance control available to fine tune the tone.