Most graphic equalizers divide sound between 6 and 31 bands of frequency, with a physical or virtual slider controlling the volume of each band. With sliders that move up or down in decibels (degrees of loudness), graphic EQs are so user-friendly they’ve become common features in car audio speaker systems and home theaters as well as recording studios. A graphic equalizer (EQ) offers a simple solution: boost or cut (make louder or softer) a specific range of frequencies to improve sound quality. A recording of music or spoken word can pick up a variety of tones, not all of them pleasant.
