Kurzweil K2500 - PERFORMANCE GUIDE REV F PART NUMBER 910251 CHAP 14 - Page 30

DSP Functions
Equalization (EQ)
14-30
This function uses a two-pole lowpass filter to give you a sharper transition in bass response
than PARA BASS. Like PARA BASS, there are control inputs pages for cutoff frequency and
amplitude, which are identical to those for PARA BASS. There is also a control input page for
resonance (also known as “q”), which can boost or cut the amplitude of the partials near the
cutoff frequency.
EditProg:F2|RES(STEEP|BASS)<>Layer:1/1||
Adjust:0dB||||||||||Src1||:OFF||||||||||
||||||||||||||||||||Depth|:0.0dB||||||||
||||||||||||||||||||Src2||:OFF||||||||||
KeyTrk:|0.00dB/key||DptCtl:OFF||||||||||
VelTrk:|0.0dB|||||||MinDpt:0.0dB||||||||
||||||||||||||||||||MaxDpt:0.0dB||||||||
<more||F1|FRQ|F2|RES|F3|AMP|F4|AMP|more>
PARAMETER RANGE OF VALUES
ADJUST -12 to 24 dB
KEY TRACKING ± 2.00 dB per key
VELOCITY TRACKING ± 30 dB
SOURCE 1 Control Source list
SOURCE 1 DEPTH ± 96 dB
SOURCE 2 Control Source list
SOURCE 2 DEPTH CONTROL Control Source list
MINIMUM DEPTH, SOURCE 2 ± 30 dB
MAXIMUM DEPTH, SOURCE 2 ± 30 dB
You’ll get the best transition in bass response with a resonance setting of -6 dB. There’s a small
frequency range above the cutoff frequency where the response reverses direction (if you’re
cutting the amplitude, for example, you’ll get a slight boost just above the cutoff frequency).
The higher you set the resonance, the larger this reversal will be, resulting in unusual—but
possibly useful—response curves at high resonance values.
-30
-20
-10
0
10
20
30
10 100 1000 10000
Frequency in Hertz
Amplitude in dB
Cutoff frequency = C 3;
gain = 12 dB;
resonance from
-12 to 18 dB
18
12
6
-12
-6
-3
Steep Resonant Bass:
Resonance