These values are fixed in Graphic EQ mode, but fully variable in Parametric EQ mode, meaning that you can freely choose the center frequency of any of the 10 available EQ bands. Unlike Graphic Equalizers, which only allow boost or cut at a pre-defined frequency and filter "Q", parametric equalizers are multi-band variable equalizers that allow users to control all three EQ parameters:įREQUENCY: The center frequency of the EQ band. You can even select multiple bands together and make changes to all of them at once. Thanks to the power and speed of the DSP, you can also hear the result of EQ changes, in real time, as you move the EQ handles with your mouse/trackpad or keyboard commands. A shelving filter which boosts or attenuates the low end of the frequency spectrum is known as a ' low shelf'.In the past, many found parametric EQ's confusing, because it was difficult to visualize the response curve being created. The digital parametric EQ in VXi amplifiers eliminates this problem by displaying precise response curves, showing you the exact effect of your parametric EQ adjustments. A narrow bandwidth might only affect frequencies as low as 25 Hz and as high as 35 Hz.Ī shelving filter (also referred to as a shelf filter, shelf EQ, shelving EQ etc.) is a great option for equalizing a signal.
But while graphic equalizers have fixed frequencies, parametric equalizers can choose a center/primary frequency. Parametric Equalizers Like the graphic equalizer, each frequency can have an increase/decrease to decibels/volume. Typical filters are low pass, high pass, and band pass.īeside above, what is the difference between a parametric and graphic equalizer?
So in a shelving EQ, all frequencies are boosted or cut by the same amount.īeside above, what is an EQ filter? Filters and Equalizers ( EQ) A filter is a device that attenuates or removes a user-defined range of frequencies from an audio waveform while passing other frequencies. ' Shelving' is not a term that is ever applied to a mid-range boost or cut. In a shelving EQ, a band of frequencies is boosted or cut either in the high-frequency end of the spectrum or in the low-frequency end. Some multiband parametric EQs offer low and high bands that can be switched to shelving filters.
Low-pass shelving filters pass all frequencies below a specified cutoff frequency, while attenuating all the frequencies above the cutoff.
Shelving equalizers come in two different varieties: high-pass and low-pass.
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