Filter
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Type describes the selected filter type. When selecting BYPASS, no effect is applied. PEQ provides a
parametric Peak Dip Filter with programmable frequency, quality, and gain. LOSLV / HISLV stand for Low
Shelving or High Shelving Equalizer, respectively. Their parameters are: frequency (f), slope, and gain.
The parameters of the LOPASS / HIPASS filters are frequency and slope.
f (frequency) sets the center-frequency of parametric EQ-types and the cutoff frequency of shelving and
Hi-Pass / Lo-Pass filters.
The value of the parameter Q determines the quality or bandwidth of parametric EQs. Higher Q-values
result in a narrow banded filter while smaller Q-values result in an increased bandwidth. The following
examples are meant to give you an idea of the effect of the Q-parameter to make correct adjustments for
your own purposes. The Q-parameter also describes the quality and therefore the graph of the Hi-Pass
and Lo-Pass filters.
Gain sets the degree of amplification or attenuation of the parametric EQ or the low shelving and high
shelving equalizers. The stepwidth is 1 dB. The response of the filter at different gain settings are shown
in the diagram below.
The Slope parameter describes the steepness or order of the filter for the low shelving or high shelving
equalizers as well as for the Lo-Pass and Hi-Pass filters. Different slope settings for the transition band
are possible. Together with the Q-parameter this provides the possibility to program the Hi-Pass filter for
so called B6-alignment; i. e. an increase in the response in the cutoff frequency range.
The following examples are meant to show you the effect of different parameter settings. The DSP 244
editor software allows you to make your own adjustments via PC or notebook computer and monitor the
resulting frequency response on the computer screen.
PEQ: f = 1kHz, Q = 2.0 Gain = +3dB, +6dB, +9dB, +12dB
PEQ: f = 1kHz, Gain = -6dB Q = 0.5, 1.0, 5.0, 20.0
PARAMETERS
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