Cutoff frequency / Cutoff point. At that point a filter becomes active and starts to affect the sound. This decrees what part of the frequency spectrum the filter works on.
Attenuation. This reduces the target frequencies.
Level / Gain. It allows you to cut ( attenuate ) or boost ( amplify ) a collection of frequencies.
Bandwidth / Q / Resonance / stress / peak. The filter effects the range of frequencies either side of the cutoff point and measured in Hertz, so it relates to frequency. it’d be more helpful if it was measured in octaves.
The five different EQ types are :
Fixed EQ. This is typically a single control like Treble or Bass. A mixer could have Low ( bass ) and High ( treble ) EQ controls. The cutoff frequency here is fixed and you control the amount of cut or boost.
Graphic EQ. The frequency ranges are fixed split into a series of bands to make cut and boost individually. Each row of sliders control a specific frequency band. They are common on hello fi systems. It also stands alone studio devices and can be discovered in software. Nonetheless, you can technically divide the range into any amount of bands, common divisions on hardware units are fifteen and 31 covering two thirds and one-third of an octave ranges respectively.
Parametric EQ. With parametric EQ you change the frequency of the bands. It has usually 3 or 4 bands, each with three controls - cutoff frequency, bandwidth and level, permitting you to use express frequencies inside a very tight range.
Paragraphic EQ. This is a sort of super-parametic EQ. It blurs the line between graphic and parametric. It offers several bands like a graphic, but with user-definable frequency bands like a parametric ; however , as this may become quite complex, they also tend to have highly-graphic interfaces to observe precisely what frequencies are being influenced.
Sweeping / Semi-parametric EQ. This is the middle between a fixed EQ and a full parametric EQ - while the bandwidth is fixed, you can control the centre frequency ( the cutoff point ). It’s common to many mixers. Normally, you can find fixed high and low EQ with a sweepable mid range control.
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