chorus pedal

British  

noun

1. music an electronic device that creates the effect of more than one sound from a single source by combining a short delay with slight deviations in pitch

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Example Sentences

The guitarist Simon Formann had already changed his sound from what’s heard on the new album: He was playing his altered and open-string chords with a chorus pedal, much less distortion, and lots of reverb, suggesting a sound bigger than himself.

From New York Times