Graphic Equalizer Live

Graphic Equalizer - set of bandpass filters with fixed center frequency cutoff and variable gain that can be controlled by a slider. This location reminds sliders frequency response equalizer, hence the name. Number of sliders can vary from 3 to 31.
The frequency at which the regulation cover the entire audio range and distant in a same interval. Often this interval is the octave, half or one-third octave. The latter are the most flexible possible.