Filter - GEM GPS3600 Owner's Manual

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Filter

Valid for all Algorithms.
The Dual 1 and Dual 3 algorithms have two Fil-
ters connected in parallel [Filter os. 1, Filter os.
2]. The Dual 2 and Dual 4 algorithms have two
Filters 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 PS/GPS fil-
ters are 2 pole filters with roll off curves at 12 dB
per octave.
If both filters are programmed with identical pa-
rameter values, they become a single 4 pole fil-
ter with a roll off curve of 24 dB per octave, per-
fect for those classic analog synth sounds.
Some additional information regarding "Filters"
is on page 2.43 of this chapter.
FILTER CONTROL PARAMETERS
TYPE: Selects the Filter type. "Off" deactivates
the filter.
Edit Sound - Main menu - Filter Editor selected
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Assignable values: Off, Low Pass, High Pass,
Band Pass, Parametric boost, Parametric cut.
CUTOFF FREQUENCY: Sets a value for the
Cutoff Frequency, or the frequency at which the
filter intervenes. The Cutoff Frequency 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
frequency, creating a peak of emphasis at the
Cutoff frequency. A high value of resonance can
place the filter on "auto-oscillation", producing a
whistling sound rich in harmonics.
Assignable Values: 0 ... 127.
CUTOFF DYNAMIC SENSITIVITY: Links the
Cutoff Frequency to Key On Velocity.
Positive values increase the Cutoff Frequency by
playing harder (the filter opens resulting in a
brighter sound), negative values produce the in-
verse effect (the filter closes and the sound be-
comes "dull").
Assignable values: –7 ... 0 ... +7. 0 = no effect.
RESONANCE DYNAMIC SENS.: Links Reso-
nance to Key On Velocity.
Positive values enhance the Resonance with in-
creased key velocity while negative values give
the inverse effect.
Assignable values: –7 ... 0 ... +7. 0 = no effect.
CUTOFF TOUCH SENSITIVITY: Links the Cut-
off Frequency to Aftertouch.
Positive values increasingly open the filters with
increased Aftertouch pressure, negative values
have the inverse effect.
Assignable values: –7 ... 0 ... +7. 0 = no effect.
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Edit Sound 2•29
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