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examples for high- and low - shelving filter
and high- and lowpass filters with different
slopes from the -3 dB corner frequencies 100
Hz resp. 1 kHz.
Q-factor (adjustment from 0...6355):
Here the Q-factor of every filter band can be
adjusted. The example in the diagram shows
a peak EQ of a mid frequency at 1 kHz and a
gain of +10 dB with different adjustments for
the Q-factor:
The example in the drawing shows
highpasses with a number of corner
frequencies:
Fig. 5.2/3: PEQ-filter (Bell); Q = 0.5, 1, 2, 4; Gain
= +10 dB; midfrequency = 1 kHz
Fig. 5.2/4: High-shelvingfilter; Q = 0.4, 0.6, 0.8,
1.0; Gain = -6 dB; crossover frequency = 1 kHz
Frequency (range of adjustment 10...20000
Hz):
When the Peak mode is selected, the mid
frequency is adjusted, in case of the shelving
filters or high- and lowpasses the -3 dB corner
frequency is selected.
Fig. 5.2/5: highpasses with crossover
frequencies of 50Hz, 100Hz, 700Hz, 2kHz, 6kHz;
selected Slope 12 dB/Oct; Gain = +10 dB;
Butterworth characteristic resp. at high and
lowpasses the adjustment of the 3dB corner
frequency.
Gain (range of adjustement -99...+12 dB):
This adjustment has a direct influence on the
gain of every filter band. The examples in
figure 5.2/6 and 5.2/7 are showing different
gain adjustments in a peak and a shelving
filter:
Fig. 5.2/6: PEQ filter (Bell); Gain: -10, -6,
-3, 0, +3, +6, +10 dB; mid frequency = 150 Hz;
Q = 2
