A chorus pedal is an effects device used by musicians, particularly guitarists and keyboardists, to create a rich, shimmering sound. It works by duplicating the original audio signal and slightly varying the pitch and timing of the copies. This effect simulates the sound of multiple instruments playing together, adding depth and texture to the music. Typically, a chorus pedal features controls for adjusting parameters like depth, rate, and mix. The depth controls how pronounced the effect is, while the rate adjusts the speed of the modulation. Many musicians use chorus pedals to enhance their sound in live performances and recordings.