Chorus can be either one of two things.
- Part of a song form: A chorus can be a part of song that has a line or lines that are repeated. Also called the refrain.
- A guitar effect: Chorus is a version of delay and is a favorite effect for clean sounds. Chorus gives the impression of multiple instruments playing the same part. The unit puts a very small delay in the signal and depending on the amount of delay it detunes the echo to give the effect that another guitar is playing with you. This effect adds a sparkle and clarity to your sound. There are chorus units that have multiple delays and detunes that can really get interesting.