Guitar Foot Pedals - EQ (Equalization) Effects

By Lynne May

"EQ" stands for Equalization and refers to the controlling of the levels of various sound frequencies in your guitar signal. If you use a stereo, or even an IPod to listen to your music, then you have probably used an "EQ" to control the levels of treble and bass. There are two basic types of EQ pedals that you can use with your guitar:

Graphic Equalization

Graphic Equalization is the most common type of EQ used by guitar players. It boosts or reduces certain frequencies by sliding several levers (bands) up or down.Normally, these bands cover the range from around 20 Hz to 20 kHz (which is approximately the range of human hearing). Some Guitarists use equalization effects to drastically alter the configuration of the signal in order to produce a desirable "signature" sound. Metal players like to achieve their signature sound by eliminating or reducing all of the middle frequencies.

You can also use graphic equalization to reduce certain problematic frequencies which cause feedback. In any particular room, some frequencies are going to be naturally more prominent than others. Equalization is used to counter these discrepancies in frequency. You can also use graphic equalization to reduce certain problematic frequencies which cause feedback. On the other hand, you can use graphic EQ to boost certain frequencies in order to PRODUCE feedback if that is what you want.

Graphic EQ's come in varying sizes--anywhere from 5 bands to 31 bands. It is best to get one with ONLY the frequencies that you need to access because more bands are more expensive and can cause more noise.

Parametric Equalization

The Parametric EQ provides more control over tone than does a graphic EQ, although it is more difficult to use. It is called "parametric" because it has knobs to adjust the parameters of a tone. These parameters are "frequency" (as in the frequencies that are controlled by the graphic EQ), "band width" (the number of octaves over which the signal is altered) and "gain" (the amount by which the signal is boosted or reduced). Parametric equalization can also be used to remove extraneous noises such as the sound of a guitar pick or the left-hand finger noise.

If you would like more information about Graphic and Parametric Equalizers, as well as about other guitar effects pedals, including purchasing resources, visit:

http://www.may-studio-music-lessons.com/guitar-foot-pedals.html

http://www.may-studio-music-lessons.com

Visit this site for free (really--no trial periods, no tricks--just FREE!) guitar, drum, piano, theory and composition lessons.

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