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MULTIMODE FILTER / RESONATOR MODULE 1047
MULTIMODE FILTER / RESONATOR MODULE 1047
Controls
(1)
(2)
(3)
(4)
(5)
(7)
(6)
(16)
(8)
(17)
(9)
(10) (11) (12) (13) (14) (15)
1. COARSE – Use this knob to dial in the general frequency 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.
2. FINE – Use this knob to refine and focus the frequency set by the COARSE
FREQUENCY knob.
3. RESONANCE (NORM/LIM) – This sliding switch lets 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/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 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 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).
5. F CV 1 – This knob adjusts the strength of the control voltage signal coming in
through the F CV 1 jack.
6. F CV 2 – This knob adjusts the strength of the control voltage signal coming in
through the F CV 2 jack.
7. NOTCH FEQUENCY/fc – Use this knob to offset the notch 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
8. INPUT – This knob adjusts the strength of the audio signal coming through
the INPUT jack.
9. Q CV – This knob adjusts the strength of the Q control voltage signal coming in
through the Q CV jack.
10. INPUT – Use this jack to route audio signals into the 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.
11. F CV 1 – Use this jack to route external control voltage or modulation signals
for the filter frequency setting into the module via cables with 3.5 mm
connectors.
12. F CV 2 – Use this jack to route external control voltage or modulation signals
for the filter frequency setting into the module via cables with 3.5 mm
connectors.
13. Q CV – Use this jack to route external control voltage signals for the
RESONANCE (Q) setting into the module via cables with 3.5 mm connectors.
14. LP – This jack sends out the final signal from the low-pass filter via cables with
3.5 mm connectors.
15. HP – This jack sends out the final signal from the high-pass filter via cables
with 3.5 mm connectors.
16. NOTCH – This jack sends out the final signal from the notch filter via cables
with 3.5 mm connectors.
17. BP – This jack sends out the final signal from the band-pass filter via cables
with 3.5 mm connectors.
Power Connection
P1
Red Stripe
2
1
10
9
200 mm ± 10
Connect end P1 to the module socket
Connect end P2 to the power supply
The MULTIMODE FILTER / RESONATOR MODULE 1047 module comes with the
required power cable for connecting to a standard Eurorack power supply
system. Follow these steps to connect power to the module. It is easier to make
these connections before the module has been mounted into a rack case.
1. Turn the power supply or rack case power off and disconnect the
power cable.
2. Insert the 16-pin connector on the power cable into the socket on the power
supply or rack case. The connector has a tab that will align with the gap in the
socket, so it cannot be inserted incorrectly. If the power supply does not have a
keyed socket, be sure to orient pin 1 (-12 V) with the red stripe on the cable.
Installation
The necessary screws are included with the module for mounting in a
Eurorack case. Connect the power cable before mounting.
Depending on the rack case, there may be a series of fixed holes spaced 2 HP
apart along the length of the case, or a track that allows individual threaded
plates to slide along the length of the case. The free-moving threaded plates
allow precise positioning of the module, but each plate should be positioned in
the approximate relation to the mounting holes in your module before attaching
the screws.
Quick Start Guide
P2
1
2
HOT USED
15
16
+ 12 V
+ 12 V
GROUND
GROUND
- 12 V
- 12 V
3. Insert the 10-pin connector into the socket on the back of the module.
The connector has a tab that will align with the socket for correct orientation.
4. After both ends of the power cable have been securely attached, you may
mount the module in a case and turn on the power supply.
Hold the module against the Eurorack rails so that each of the mounting holes
are aligned with a threaded rail or threaded plate. Attach the screws part way
to start, which will allow small adjustments to the positioning while you get
them all aligned. After the final position has been established, tighten the
screws down.
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