Kurzweil K2661 - Equalization (EQ)

DSP Functions
The DSP Functions
16-25
Equalization (EQ)
Equalization is a specialized filtering process that lets you boost or cut the amplitude of a
specified range of frequencies.
Parametric Equalizer (PARAMETRIC EQ)
This function has three interacting parameters, each with its own control-input page: center
frequency, width, and amplitude. The center frequency is the center of the range of frequencies
that will be boosted or cut by the amplitude setting. The width is the entire range of frequencies
that will be affected by the amplitude setting. For the K2661, the width is defined by imagining
an amplitude curve with a level (in dB) of -infinity (minus infinity) at the center frequency, then
measuring the distance (in octaves) between the points on the curve where the amplitude is
attenuated by 3dB. See the diagram below.
Parametric EQ Treble Tone Control
Mid-range Parametric EQ Steep Bass Tone Control
Bass Tone Control
0
2
4
6
8
10
12
14
16
10 100 1000 10000 100000
Frequency in Hertz
Amplitude in dB
Gain = 12 dB;
width = 2 octaves;
cutoff frequency from C 4 to C 10
C 4
C 10