NONLINEAR LABS C15 - Page 26

Sound Generation
26
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Excursion: The S.V. Filter functionality
The S.V. Filter is a combination of two resonating two-pole state-variable filters, each
with a slope of 12 dB. Cuto and Resonance can be controlled manually or modu-
lated by Envelope C and Key Tracking.
The spacing between both cuto-points is variable (“Spread”). The filter characteris-
tics can be swept continuously from low through band to high-pass mode (“L–B–H”).
Both filters work in series by default but can be continuously shied to parallel
operation (“Parallel”).
• Setting Spread to 0.0 st creates a simple four-pole filter. At higher Spread values,
the spacing between the two Cuto frequencies increases.
• Cuto and Resonance always aect both filter sections in the same manner.
• L–B–H determines the characteristics of both filter sections:
• L – both filter sections work in lowpass mode. High frequencies are attenuated,
producing a sound that can be described as “round”, “so”, “fat”, “dull” etc.
• H – both filter sections work in highpass mode. Low frequencies are attenuated,
producing a sound that can be described as “sharp”, “thin”, “bright” etc.
L–B–H
Reson
Reson
Parallel
Parallel
FM
from A-B
FM
FM
Cuto
Spread
Key Trk
Env C
Note Pitch &
Pitchbend
Env C
L-B-H 1
L-B-H 2
Cut 1
Cut 2
Cut 1 Cut 2
L-B-H 1 L-B-H 2
Cuto Control
L-B-H Control
2-Pole SVF
2-Pole SVF
X-Fade
X-Fade
Out
In