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    A Vibe or rotary speaker simulator pedal reproduces the sound of a rotating speaker. This is accomplished by synchronizing volume oscillation, frequency-specific volume oscillation, vibrato (pitch wavering), phase shifting, and chorusing in relation to a non-rotating speaker. The modulation speed can be ramped up or down, with separate speeds for the bass and treble frequencies, to simulate the sound of a rotating bass speaker and a rotating horn. This effect is simultaneously a volume-oriented effect, an equalization-oriented effect, and a time-based effect. Some vibe pedals also include an overdrive effect, which allows the performer to add “tube”-style distortion.

    Some Vibe pedals include:

    • Dunlop Univibe
    • Boss RT-20