Filter - GEM Powerstation SK760 Owner's Manual

Filter

Valid for all Algorithms. For the Dual 1 and Dual
3 algorithms, two Filters are connected in paral-
lel [Filter os. 1, Filter os. 2]. For the Dual 2 and
Dual 4 Algorithms, the Filters are connected in
series [Filter 1, Filter 2].
Filters enhance or attenuate certain frequencies
of the Waveforms. The sound changes accord-
ing to the type of filter selected. The SK760/880
filters are 2 pole filters with roll off curves at 12
dB per octave.
In the Dual 1 and Dual 3 Algorithms, the Filters
are connected in parallel, so that Filter 1 oper-
ates on oscillator 1 and Filter 2 on oscillator 2.
In the Dual 2 and Dual 4 Algorithms, the Filters
are connected in series, so that Filter 2 operates
on the sound already processed by Filter 1. If
both filters are programmed with identical param-
eter values, they become a single 4 pole filter
with a roll off curve of 24 dB per octave, perfect
for those classic analog synth sounds.
Some additional information on "Filters" appears
on page 39 of this chapter.
Edit Sound - Main menu - Filter Editor selected
Filter Control parameters
Type Selects the Filter type.
"Off" deactivates the filter.
Assignable values: Off, Low Pass,
High Pass, Band Pass, Parametric
boost, Parametric cut.
Cutoff Sets a value for the Cutoff
Frequency Frequency, or the frequency at which
the filter intervenes. The Cutoff Fre-
quency is the same for all the notes
of a Sound, unless you programme
Filter Tracking.
Assignable values: 0 ... 191.
Resonance Applies resonance to the Cutoff fre-
quency, creating a peak of empha-
sis at the Cutoff frequency. A high
value of resonance can place the fil-
ter on "auto-oscillation", producing a
whistling sound rich in harmonics.
Assignable Values: 0 ... 127.
Edit Sound - Filter Control parameters
Edit Sound 16•23