Kurzweil K2661 Musician's Manual page 504

DSP Functions
The DSP Functions
One-pole Lowpass Filter (LOPASS)
Frequencies below the cutoff frequency are unaffected by this filter. At the cutoff frequency, the
signal is attenuated 3 dB. There's a rolloff of 6 dB per octave above the cutoff frequency—that is,
the signal is attenuated 6 dB with each octave above the cutoff. The resonance—the amount of
cut or boost at the cutoff frequency—is fixed at -3dB. When the cutoff frequency is well below
the lowest-frequency partials of a sound, lowering the cutoff further will not affect the timbre of
the sound, but will reduce its overall amplitude.
Parameter
Coarse Adjust
Fine Adjust
Key Tracking
Velocity Tracking
Pad
Source 1
Source 1 Depth
Source 2
Source 2 Depth Control
Minimum Depth, Source 2
Maximum Depth, Source 2
16-8
Frequency in Hertz
10 100
0
-10
-20
-30
-40
Cutoff Frequency
from C5 to C10
-50
-60
Range of Values
C 0 16 Hz to G 10 25088 Hz
± 100 cents
± 250 cents per key
± 10800 cents
0, 6, 12, 18 dB
Control Source list
± 10800 cents
Control Source list
Control Source list
± 10800 cents
± 10800 cents
1000 10000
C5
100000
C10