Chorus is an effect that creates the illusion of multiple instruments or voices playing in unison by subtly duplicating the original signal and then detuning and delaying it slightly. This results in a shimmering, lush sound that can make a single instrument appear as if it’s being played by a group. The effect adds depth and movement to the sound, making it more vibrant and full.

Chorus pedals typically have controls for depth (how pronounced the effect is), rate (the speed at which the modulation occurs), and mix (the balance between the dry and affected signal). The effect is widely used in various genres, from rock to pop, and is especially popular for guitarists and bassists seeking a richer, more textured tone. Famous chorus pedals include the Boss CE-1, Electro-Harmonix Electric Mistress, and the MXR Analog Chorus, which are known for their smooth, swirling sounds.