The Electro Harmonix Pitch Fork is an incredibly diverse polyphonic pitch shifting pedal that has a 3 octave range You can shift your guitar sound up, down or both at the same time with the Pitch Fork, whether you would like to control it continuously with an expression pedal or at set intervals using the 11 position Shift switch 3 Octaves of Pitch ShiftingYou have a lot of control over this pedal and just how much shifting you want on your sound Everything from a 17 cent detune that works great for adding a different feel to your sound, to 3 octaves above or below and a wide choice between The Pitch Fork also features Dual mode where it selects a harmony for the interval you have chosen for example you could get a perfect 5th above and 1 octave below from a single pedal You don t just get set pitches with the Pitch Fork though When you plug in a expression pedal in latch mode you can control the pitch continuously so you get exactly what you want every time This particular trick can also be used to create whammy like effects that increase your pitch shift the further you push the expression pedal Latch and Momentary ControlYou have two main modes of operation with the Pitch Fork, Latch and Momentary When in latch mode you turn the effect on and off using the footswitch and you can control the pitch with an external expression pedal to go from no effect to what ever interval you have selected on the Shift switch In Momentary control mode the effect is only on if you hold down the built in footswitch When you release the footswitch it goes back to your standard non effected sound While in the momentary mode you can control the Glissando rate from 4 milliseconds to 2 seconds with an external expression pedal Here s what Electro Harmonix say about the Pitch Fork:The Pitch Fork transposes an instrument s pitch over a +/- three octave range and features three modes which allow the pitch to be transposed up, down or both, simultaneously The pitch shift amount can be set to a fixed interval or continuously varied by an expression pedal or control voltage The controls are straightforward and intuitive An 11-position Shift switch selects the maximum transposition interval ranging from D (Detune), a shift of 17 cents, through Minor 2nd, Major 2nd, Major 3rd, Perfect 4th, Perfect 5th, Major 6th, Minor 7th, 1 Octave, 2 Octaves and 3 Octaves A three position toggle switch controls whether the pitch is transposed up, down or both In Dual mode, two pitch-shifted signals are output One follows the shift knob as if in the Up position while the other creates a harmony Dual Mode settings include M3 up + P5 up, P5 up + 1 Oct down, 1 Oct up + 1 Oct down and many others A Blend knob controls the mix of the dry signal and the effected signal, and an EXP jack enabl