Kurzweil K2000 - MUSICIANS GUIDE - Page 263

DSP Functions
Filters
14-11
This combines 2POLE LOWPASS and LOPAS2 in one three-stage function. The parameters on
the F1 FRQ control input page affect the cutoff frequencies of both Þlters. The parameters on
the F2 RES page affect the resonance of 2POLE LOWPASS. The parameters on the F3 SEP page
shift the cutoff frequency of LOPAS2, creating a separation between the cutoff frequencies of
the two Þlters. Positive values raise the cutoff frequency of LOPAS2, while negative values
lower it. If no separation is applied, thereÕs a 24 dB per octave rolloff above the cutoff frequency.
EditProg:F3|SEP(4P|LOPASS)|<>Layer:1/1||
Adjust:0ct||||||||||Src1||:OFF||||||||||
Fine||:0ct||||||||||Depth|:0ct||||||||||
||||||||||||||||||||Src2||:OFF||||||||||
KeyTrk:0ct/key||||||DptCtl:OFF||||||||||
VelTrk:0ct||||||||||MinDpt:0ct||||||||||
||||||||||||||||||||MaxDpt:0ct||||||||||
<more||F1|FRQ|F2|RES|F3|SEP|F4|AMP|more>
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
10 100 1000 10000 100000
Frequency in Hertz
Amplitude in dB
Cutoff frequency = C 5;
separation = 0;
resonance from -12 to 24 dB
24
-12
4-Pole Lowpass Filter:
Resonance
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
10 100 1000 10000 100000
Frequency in Hertz
Amplitude in dB
Cutoff frequency = C 7;
resonance = 12 dB;
separation from -2 to +2
-2
+2
4-Pole Lowpass Filter:
Separation in Octaves