A vibe pedal, (known as a uni-vibe or vibrato pedal, is a modulation effect that can produce sounds similar to a chorus pedal or phaser pedal.
It originally was created to try to emulate the sound of a Leslie speaker.
Although it did not accurately reproduce the sound, the vibe effect it created has stuck around.
Macdaddy Music sells a variety of vibe pedals from brands such as Dunlop, Keeley, Electro-Harmonix, Red Witch, and Wampler.
A vibe pedal, also known as a uni-vibe pedal, is a modulation effect for your electric guitar that can produce sounds similar to the chorus or phaser effects. It was created as an attempt to reproduce the sounds of a Leslie speaker.
A vibe pedal offers a sound that's more of a rotation sound (think a Leslie speaker sound), while a chorus doubles a signal giving the impression of multiple guitars playing at once, while a phaser gives the impression more of a "whooshing" sound as the frequency peak moves across the EQ spectrum.
Jimi Hendrix was the master of effects and included a uni-vibe on his pedalboard. You can hear the effect in songs such as Hey Baby, Izabella, and Country Blues.
Even though vibe is technically part of the modulation category, many people place their vibe effect before their overdrive effects for a better sound.