The Shin-Ei Original Uni-Vibe is a legendary phase shifter effect pedal designed by audio engineer Fumio Mieda. Introduced in the 1960s, it was originally marketed as the Vibra-Chorus by Japanese company Shin-ei (then known as Honey). The pedal was designed to mimic the sound of radio signals from Russia undergoing atmospheric modulation, creating a unique chorus and vibrato effect for electric organ or guitar.

The original Shin-Ei Uni-Vibe features a distinctive metal hood with a mirror-like interior, an incandescent bulb, and four Light Dependent Resistors (LDRs). This unique arrangement is believed to be essential for producing the pedal’s signature sound. The pedal also has an external speed control foot pedal, allowing for precise control over the effect.

The Shin-Ei Uni-Vibe has been widely used by many famous guitarists, including Jimi Hendrix, David Gilmour, and Eric Clapton, to name a few. Its thick, rich “chorus” effect has become a staple in classic rock music. While many companies have copied the Uni-Vibe's design, many players agree that there’s no substitute for the original.

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