These devices strengthen (boost) or weaken (cut) the energy of specific frequency bands or "frequency ranges". In sound recording and reproduction, equalization is the process commonly used to alter the frequency response of an audio system using linear filters.
Herein, what is a graphic equalizer used for?
A graphic equalizer, more commonly known as an EQ is used to change the frequency response, or in other words the tone, of a sound, song, or instrument. It can be used to give more bass, less bass, more treble, etc. Learning to use a graphic equalizer is not too difficult, but it takes a bit of practice to get used to.
What does the parametric equalizer do?
Parametric EQ. In a parametric equalizer, each filter cuts or boosts a range of frequencies. Each filter has three controls: frequency: the center of the frequency range to be cut or boosted.