Chorus (audio effect)

While similar sounds coming from multiple sources can occur naturally, as in the case of a choir or string orchestra, it can also be simulated using an electronic effects unit or signal processing device.

Ensembles of instruments and voices can produce a natural chorus effect, such as with a string orchestra or choir.

The pitch of the added voices is typically modulated by an LFO, which is implemented similarly to a flanger, except with longer delays and without feedback.

Some pitch shift pedals create a slightly detuned unison effect which is more similar to the acoustic chorus sound.

Some examples of the use of "obviously chorused guitar tracks" include Red Hot Chili Peppers' "Soul to Squeeze" (0:00), Fripp & Eno's "Evensong" (0:37), Guns N’ Roses “Paradise City” (0:00), Nirvana's "Come As You Are" (0:00, clearest at 0:48), Mike Stern's "Swunk" (0:00), and Satellite Party's "Mr. Sunshine" (0:19, right channel).

[2] The chorus effect was also a prominent hallmark of guitarist Andy Summers ("The Police"; Tracks: "Don't Stand so Close to Me", "Walking on The Moon", "Every Breath You Take").