Whammy

The Whammy by DigiTech is a pitch shifter pedal that emulates sounds typically produced using the vibrato bar on a guitar, but with an expanded pitch range and without the tuning issues associated with traditional vibrato bars. It was the first widely used effects pedal with foot-controlled pitch shifting effects. The pedal features a variety of preset settings and adds expression control through the foot pedal. The Whammy has been used by notable artists such as Ed O'Brien and Jonny Greenwood of Radiohead, Matt Bellamy of Muse, Tom Morello of Rage Against the Machine and Audioslave, and David Gilmour of Pink Floyd.

The technical specifications and features of the Whammy include:
- Effects type: Pitch shifter
- Whammy mode
- Harmony Bend mode
- Wah-wah pedal (on XP-100)
- Hardware: Digital
- Polyphony supported (on Whammy DT & V)
- Filter: 1 wah-wah (on XP-100)
- Controls: Pedal control with expression pedal for pitch bend
- Input/output: External control via MIDI I/O (on Whammy IV) for pitch bend via CC

The Whammy has undergone several iterations, including the WH-1 Whammy, DigiTech Whammy II, DigiTech XP-100 Whammy-Wah, DigiTech Bass Whammy, DigiTech Whammy IV, DigiTech Whammy DT, and the Whammy V. Each iteration introduced new features and improvements, such as polyphonic pitch shifting, true bypass, and the ability to switch between different pitch-shifting algorithms.

The Whammy pedal has been popular among guitarists across various genres, including rock, metal, and alternative music, and is recognized as an iconic guitar pedal by musicians worldwide. Later Whammy pedals can be controlled via MIDI program changes and control changes, expanding their sonic potential.