What is a Chorus Effect?

A chorus effect is an audio effect that makes a single sound appear as if multiple voices or instruments are performing together. It works by slightly duplicating the original signal and altering the timing and pitch of the copies by small amounts. When these slightly different versions are combined with the original sound, they create a fuller and richer tone.

Chorus effects typically use short delays and subtle pitch modulation to simulate the natural differences that occur when multiple performers play or sing the same part. Because no two performers produce identical timing or pitch, the chorus effect recreates this variation electronically. This results in a thicker, more spacious sound that can enhance many types of instruments.

The chorus effect is widely used in music production, especially on guitars, synthesizers, and vocals. It became particularly popular in the 1980s, where it helped create lush and shimmering tones in pop and rock music. By adding depth and movement to a sound, chorus remains a common effect in both studio recordings and live performances.