The Uni-Vibe Chorus/Vibrato is one of the most iconic effects in music history. Since the late 60s, groundbreaking guitar players have used it to expand the tonal and textural palette of the electric guitar. With its simple three-knob interface, you can dial up the iconic effect to your taste in short order. First, use the VIBE switch to select either Chorus Mode - dry signal mixed with pitch-shifted signal - or Vibrato Mode - only pitch-shifted signal. Then, use the LEVEL control to set the effect volume, the SPEED control to set the sweep rate, and the DEPTH control to set overall intensity.