Illusonic IAP4, Руководство пользователя

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Illusonic IAP 4 Chapter 8
Menu: Equalizer
47
8.3
Equalizer Types and Parameters
A variety of filters can be used to modify the frequency response of each
loudspeaker signal in a flexible way to achieve a desired equalization. All
filters are implemented as minimum phase filters to minimize delay and tem-
poral artifacts. For each of the ten equalizers per channel, IAP 4 allows the
user to choose one of the following types:
– Off
Equalizer is disabled.
–
Bell
gain [dB]
0 dB
f0
∆ f
3 dB
The Bell-shape filter applies a gain to amplify/attenuate a frequency
range around a center frequency
f
0
. The width of the frequency range
f
is defined by the quality factor:
Q
=
f
0
f
–
Low Pass
0 dB
3 dB
f0
The low-pass filter maintains low-frequencies and attenuates frequencies
above the cutoff frequency
f
0
with 12 dB per octave.