A superb Electro Harmonix Bad Stone phase shifter effect pedal. The Electro Harmonix Bad Stone phase shifter is a remake of the original model in a nano chassis. The circuit design remains the same, however, with variable feedback and six stages of phase shifting and a manual mode that allows you to freeze the phase for some truly unique sounds.The Bad Stone delivers an incredible six stages of phase shifting plus a manual mode that lets the player freeze the phase. Its Rate knob controls the phase shifting speed which goes from a very slow swoosh to a rapid, oscillating warble. Feedback determines the depth of the phase effect and a toggle switch lets the user select Auto or Manual modes.