![]() High-cut is often used to reduce the level of high frequency hiss or to take the edge off a sharp sound whereas low-cut filtering is often used to reduce the level of deep bass or rumble caused by floor vibrations. Filters steeper than 24dB per octave can have an undesirable effect on the tonality with 18dB/octave being a popular compromise. It follows then that a second order filter will have a 12 dB/octave, a 3rd order filter 18dB/octave, a 4th order 24dB/octave and so forth. A simple resistor/capacitor analog filter has a 6dB per octave slope, and this is sometimes expressed as being a first order filter. They can be designed with varying degrees of steepness expressed dBs/octave where the more dBs, per octave, the steeper the filter. Most serious equalizers include what are known as high-cut and low-cut filters, and they’re used as their name implies, to reduce the levels of the extreme highs and lows without affecting what goes on in the region between them. ![]() While your home hi-fi might just have basic bass and treble controls, the studio equalizer, whether hardware or plugin, can be much more sophisticated. EQ can be used both to create new tonalities and to help correct or equalize problems that occurred in the recording chain, though you should always strive to fix such problems first. Author: Paul White Editor-In-Chief for Sound on Sound and Roland UK Features Team What is Equalization (EQ)?Īs far as music production is concerned, Equalization is really just a fancy word for tone control – a device that can cut or boost particular parts of the audio spectrum.
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