Filter Section - CreamWare Pro-12 Klangbox Benutzerhandbuch

Filter section

Along with the envelope cur-
ve and other modulation
sources, the PRO-12 ASB's
filter controls the way the
synthesizer's tone changes
over time. The filter is the
'lowpass' type with a slope
of 24dB per octave; this me-
ans that all frequencies abo-
ve the 'cutoff' frequency are
reduced in volume by 24dB per octave, while frequencies below the
cutoff point are left untouched. Filter 'resonance' is created by feed-
back between the filter's input and output, which accentuates fre-
quencies around the region of the cutoff frequency. When the reso-
nance is turned right up, the filter self-oscillates (i.e. produces a
musical pitch).
To modulate the filter cutoff you can use the filter's envelope curve,
keyboard tracking, the LFO and the two sources in the 'Poly Mod'
modulation matrix (see below).
Cutoff
FiIlter 'cutoff frequency' is the frequency above which the PRO-12
ASB's tonal spectrum is filtered and its overtones are reduced in
volume. You can adjust the cutoff frequency manually.
Resonance
This knob determines the amount of resonance in the filter's sound.
Filter resonance is created by feedback between the filter's input
and output, which accentuates frequencies around the region of the
cutoff frequency. When resonance is turned right up the filter self-
oscillates, producing a sine wave at the selected cutoff frequency.
The filter can therefore be regarded as an additional sound source
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