Eq graphics
However there are some things you could know to make your understanding better. You don't have to know much about a graphic equalizer to operate one. However, even an approximation is useful - you can glance quickly at a graphic equalizer and see what kind of curve it is set to. And when you have set the graphic EQ the way you like it, the positions of the knobs show a graph of the frequency response! In fact, the supposed graph is merely an approximation because the bands overlap and interact with each other. The idea is that you can set any frequency response curve you like, and not necessarily symmetrical in the mid-range as it is with a conventional EQ. There are graphic equalizers that work in whole octaves with fewer bands, but they are not nearly as effective or precise. Each band has a cut or boost up to +/-6 dB (some models offer a wider range up to +/- 12 dB or so). So this would be called a third-octave graphic equalizer. The Klark Teknik DN370 has thirty bands of EQ per channel, each band covering one third of an octave. Here we can see the Klark Teknik DN370 two-channel graphic EQ. But there are other styles of equalizer, one popular type being the graphic EQ. Plug-ins on computer-based recording systems mimic the features of analog console EQ. The EQ sections provided in mixing consoles are flexible, easy to use and powerful. The graphic equalizer is sometimes seen in studios and is often seen as essential in live sound.