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MULTIMODE FILTER / RESONATOR MODULE 1047
MULTIMODE FILTER / RESONATOR MODULE 1047 Controls
(1)
(2)
(3)
(5)
(6)
(8)
(9)
(10) (11) (12) (13) (14) (15)
Controls
(EN)
COARSE – Use this knob to dial in the general frequency
(1)
area you want for the high-pass threshold, low-pass
threshold, band-pass center frequency and notch filter
center frequency, then go to the FINE knob to refine the
frequency setting. The frequency set by the COARSE and
FINE knobs ("fc") will be used simultaneously for every
filter in the module.
FINE – Use this knob to refine and focus the frequency set
(2)
by the COARSE FREQUENCY knob.
RESONANCE (NORM/LIM) – This sliding switch lets
(3)
you choose between normal resonance mode (NORM)
and limiting mode (LIM), which limits the height of a
filter's resonant peak. The LIM setting prevents circuit
overload when focusing a filter on a strong harmonic or
fundamental frequency, especially at high Q settings on
the RESONANCE (Q) knob. In other situations, the LIM
setting can result in a very low output signal, and so the
NORM setting is usually preferred.
(4)
RESONANCE (Q) – This knob controls the width/
(4)
smoothness and narrowness/sharpness of the filter
curves. At low Q settings, the filter curves are wider and
smoother, with a gentler effect on the sound (except for
the notch filter, which functions most effectively at low
(7)
Q settings). As you increase the Q setting, the filter curves
gradually become narrower and sharper, which can help
you to focus in on narrow frequency bands. At higher Q
settings, the various filters can produce resonant peaks
in the filter curves that boost some frequencies and may
(16)
require moving the RESONANCE (NORM/LIM) switch to
the LIM setting to prevent overloading the circuit (or the
INPUT attenuator knob can be turned down).
(17)
F CV 1 – This knob adjusts the strength of the control
(5)
voltage signal coming in through the F CV 1 jack.
F CV 2 – This knob adjusts the strength of the control
(6)
voltage signal coming in through the F CV 2 jack.
Quick Start Guide
NOTCH FEQUENCY/fc – Use this knob to offset the notch
(7)
filter's center frequency ("fc") set by the COARSE and FINE
frequency controls. For standard notch filter behavior, the
NOTCH FREQ/fc control should be set to "1" on the scale.
This standard setting can then be tweaked by moving the
NOTCH FREQ/fc knob very slightly around "1". Also, if
higher Q values are added via the RESONANCE knob while
the notch filter is offset from fc, the higher Q values result
in a resonant peak at fc, with the notch at the point set by
the NOTCH FREQ/fc knob.
Knob Setting
Effect
Notch filter output becomes a
Full CCW
copy of the high-pass output
Notch frequency shifts
CCW to 1/4
significantly below fc
Notch frequency shifts
CW to 4
significantly above fc
Notch filter output becomes a
Full CW
copy of the low-pass
filter output
INPUT – This knob adjusts the strength of the audio
(8)
signal coming through the INPUT jack.
Q CV – This knob adjusts the strength of the Q control
(9)
voltage signal coming in through the Q CV jack.
INPUT – Use this jack to route audio signals into the
(10)
module via cables with 3.5 mm connectors. You can also
route in a keyboard gate signal to "ring" the filter and
produce a unique percussive sound when you press a key.
F CV 1 – Use this jack to route external control voltage or
(11)
modulation signals for the filter frequency setting into the
module via cables with 3.5 mm connectors.
F CV 2 – Use this jack to route external control voltage or
(12)
modulation signals for the filter frequency setting into the
module via cables with 3.5 mm connectors.
Q CV – Use this jack to route external control voltage
(13)
signals for the RESONANCE (Q) setting into the module via
cables with 3.5 mm connectors.
LP – This jack sends out the final signal from the low-pass
(14)
filter via cables with 3.5 mm connectors.
HP – This jack sends out the final signal from the high-
(15)
pass filter via cables with 3.5 mm connectors.
NOTCH – This jack sends out the final signal from the
(16)
notch filter via cables with 3.5 mm connectors.
BP – This jack sends out the final signal from the band-
(17)
pass filter via cables with 3.5 mm connectors.
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