A
Parametric Equalizer, or a Parametric
EQ for short, is an
electronic device used to modify the the levels of certain
frequencies in an
electrical audio signal. As opposed to a
Graphic Equalizer, a Parametric EQ lets you select which frequencies you want to adjust specifically. Generally a parametric EQ will have controls for:
1.
Frequency
2.
Bandwidth
3.
Gain
Normally the
unit has several groups of these controls (for instance the low high and mid eq on a mixing chanel), so you can control several frequency
bands. Newer more
expensive,
professional,
rack mounted Parametric EQs, often have a
graphical display of the frequecies between
20hz and
20khz and let you see graphically what your
EQ setting looks like, in
addition to having an
RTA (
Real Time Analyzer).