Sound Production and Manipulation [SPM]  >  Sound Shaping  ]

The use of filters to modify the spectrum of a sound, either for creative effect or as a corrective. A graphic equaliser provides controls over a large number of filters (twenty or more) covering the audio range, allowing selected bands of frequencies to be cut or boosted. One application is to compensate for any undesired room resonances which might otherwise lead to inappropriate adjustments being made during the recording process, the equaliser being applied between the monitor output from the mixing desk and the main amplifiers. A ’parametric equaliser’ is a tuneable tone control, giving variable boost or cut of a selected frequency, usually also with a control to vary the bandwidth. (Source - Richard Dobson (1992). A Dictionary of Electronic and Computer Music Technology. Oxford University Press.)


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