Akai S6000 Operator's Manual page 126

EDIT PROGRAM
NOTE: The differences between the five notch filters are subtle, it must be said but with different
cutoff frequency and resonance settings and depending on the modulation settings and the
sound being processed, you will hear quite distinct differences.
116
NOTCH 1
NOTCH 2
NOTCH 3
WIDE NOTCH
BI-NOTCH
s5000 / s6000
A notch filter with a single notch that attenuates
harmonics. The cutoff control sets the point of
attenuation whilst resonance simultaneously
increases the depth of the notch and narrows its
width.
A notch filter with a two notches spaced two octaves
apart. Resonance increases the depth of the notches
and narrows their width.
A notch filter with a two notches spaced three octaves
apart. Resonance increases the depth of the notches
and narrows their width.
Another dual notch filter with one notch in the upper
frequencies and the other in the lower frequencies.
Resonance has the same effect as the other notch
filters.
A dual notch filter based on NOTCH 1 in which
modulation sweeps the notches in opposite
directions. As one moves up through the frequency
range, the other moves down and vice versa .
Version 1.21