Vai's pedalboard consists of a wah-wah pedal (either his Morley Bad Horsie signature pedal, or a Dunlop Cry Baby 95q), an Ibanez Jemini twin distortion pedal, and DigiTech Whammy DT pitch shifting pedal. The centerpiece of the pedalboard is the Axe-Fx MFC-101 foot controller for the Axe-Fx II XL, which, as previously mentioned, controls the effects in a manner similar to switching on and off stompboxes. There are two expression pedals used for the Axe-Fx, one to act as a volume pedal, and the other to control the harmonizer built into the Axe-Fx unit.