What is "uni-vibe"

The Uni-Vibe (or UniVibe) is a footpedal-operated phaser or phase shifter for creating chorus and vibrato simulations for electric organ or guitar. It was introduced in the 1960s by Shin-ei, and was intended to emulate the " Doppler sound" of a Leslie speaker. Though not a very successful Leslie simulator, the Uni-Vibe has become an effect in its own right, putting its stamp on tracks like Robin Trower's " Bridge of Sighs", Jimi Hendrix's " Machine Gun" and Pink Floyd's " Breathe". The effect, though often associated with chorus, is in fact created through a staggered series of phasing filters, unlike the usually aligned filters of a normal phasing effect. Unlike most other phaser pedals, this is achieved without the use of op-amps.

The Shin-ei Uni-Vibe was also sold as a Univox product.

"Uni-Vibe" is now a registered trademark of Dunlop Manufacturing, Inc..

Notable users of the Uni-Vibe are Jimi Hendrix, Robin Trower, Trey Anastasio and David Gilmour of Pink Floyd.