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Effects units


An effects unit or pedal is an electronic or digital device that alters how a musical instrument or other audio source sounds. In the 2010s, most effects use solid state electronics and/or computer chips. Some vintage effects units from the 1930s to the 1970s and modern reissues of these effects use mechanical components as well (e.g., Leslie rotating speaker, spring reverb, and tape recorder-based echo effects) or vacuum tubes. Some effects subtly "color" a sound, such as a reverb unit used on a low setting, while others transform it dramatically, such as a distortion pedal used with electric guitar, with the overdrive set to its maximum level. Musicians, audio engineers and record producers use effects units during live performances or in the studio, typically with electric guitar, electronic keyboard, electric piano or electric bass. While guitar effects are most frequently used with electric or electronic instruments, effects can also be used with acoustic instruments, drums and vocals. Rackmounted or audio console-integrated reverb effects are commonly used with vocals in live sound and sound recording. Examples of common effects units include wah-wah pedals, fuzzboxes and reverb units.


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