Effects units

A vocoder (/ˈvoʊkoʊdər/, short for voice encoder) is a category of voice codec that analyzes and synthesizes the human voice signal for audio data compression, multiplexing, voice encryption, voice transformation, etc.

A phaser is an electronic sound processor used to filter a signal by creating a series of peaks and troughs in the frequency spectrum.

Ring modulation is a signal-processing function in electronics, an implementation of amplitude modulation or frequency mixing, performed by multiplying two signals, where one is typically a sine wave or another simple waveform.

Flanging /ˈflændʒɪŋ/ is an audio effect produced by mixing two identical signals together, one signal delayed by a small and gradually changing period, usually smaller than 20 milliseconds.

Wah-wah (or wa-wa) is an imitative word (or onomatopoeia) for the sound of altering the resonance of musical notes to extend expressiveness, sounding much like a human voice saying the syllable wah.

In music, a chorus effect (sometimes chorusing or chorused effect) occurs when individual sounds with approximately the same timbre, and very similar pitch converge and are perceived as one.

Delay is an audio effect which records an input signal to an audio storage medium, and then plays it back after a period of time.

Octave effect boxes are a type of special effects unit which mix the input signal with a synthesised signal whose musical tone is an octave lower or higher than the original.

Dynamic range compression (DRC) or simply compression is a signal processing operation that reduces the volume of loud sounds or amplifies quiet sounds by narrowing or compressing an audio signal's dynamic range.

An effects unit or pedal is an electronic or digital device that alters how a musical instrument or other audio source sounds.

Distortion and overdrive are forms of audio signal processing used to alter the sound of amplified electric musical instruments, usually by increasing their gain.

Distortion is the alteration of the original shape (or other characteristic) of something, such as an object, image, sound or waveform.

Auto-Tune is an audio processor created by Antares Audio Technologies which uses a proprietary device to measure and alter pitch in vocal and instrumental music recording and performances.

Musitronics, often shortened to Mu-tron, was a manufacturer of electronic musical effects active in the 1970s.

The box has connectors for the connection to the speaker output of an instrument amplifier and a connection to a normal instrument speaker.

Spicetone is a music technology company focusing on guitar effect pedals.

Shenzhen Mooer Audio Co.

MXR, also known as Immersive, was a Rochester, New York-based manufacturer of effects pedals, co-founded in 1972 by Keith Barr and Terry Sherwood and incorporated as MXR Innovations, Inc.

Electro-Harmonix is a New York-based company that makes high-end electronic audio processors and sells rebranded vacuum tubes.