Kurzweil K2600 Musician's Manual page 506

DSP Functions
The DSP Functions
Two-pole Bandpass Filter, Fixed Width (BAND2)
The only functional difference between BAND2 and BANDPASS FILTER is that the width of
BAND2 is Þxed at 2.2 octaves. This gives you a one-stage bandpass Þlter function.
Double Notch Filter with Separation (DOUBLE NOTCH W/ SEP)
16-22
10 100
0
C 4
-10
-20
-30
-40
-50
-60
-70
10 100
0
-10
-20
-30
-40
Center frequency = C 7;
-50
width = 2 octaves
separation at -2, 0 +2
-60
Frequency in Hertz
1000 10000
Center frequency
from C 4 to C 10
Frequency in Hertz
1000 10000
-2
0
100000
C 10
100000
+2