In music, the "Chorus Effect" occurs whenever individual sounds with approximately the same time, and extremely similar pitches combine and are perceived as being one. Think about an orchestra or a choir where there is more than one voice playing/singing the same part. There is a certain richness and shimmer quality to the sound. That's what Chorus Pedals aim to add to your tone. Our VCH-20 Vintage Analog Chorus Pedal takes your signal, and combines it with copies of itself that are slightly varied. The circuitry incorporates those voices with a low-frequency oscillation. Those processes make that multiple-voice sound and shimmer you're looking for. Use the responsive Level, Rate, and Depth knobs to easily dial-in your desired chorus thickness.