A chorus effect (sometimes chorusing, choruser or chorused effect) occurs when individual sounds with approximately the same time, and very similar pitches converge and are perceived as one.
Delay is an audio effect and an effects unit which records an input signal to an audio storage medium, and then plays it back after a period of time. The delayed signal may either be played back multiple times, or played back into the recording again, to create the sound of a repeating, decaying echo.
Distortion is a form of audio signal processed to alter the sound of amplified electric musical instruments, usually by increasing their gain, producing a "fuzzy", "growling", or "gritty" tone.
Reverb occurs when a sound hits any hard surface and reflects back to the listener at varying times and amplitudes to create a complex echo, which carries information about that physical space. Reverb pedals or effects simulate or exaggerate natural reverberations
In music, tremolo is a trembling effect between two notes or chords in alternation, an imitation (not to be confused with a trill) of the preceding that is more common on keyboard instruments.
A wah-wah pedal (or simply wah pedal) is a type of electric guitar effects pedal that alters the tone and frequencies of the guitar signal to create a distinctive sound, mimicking the human voice saying the onomatopoeic name "wah-wah".>