Page 1
QUAD VCF/VCA
MANUAL V.1
SPUTNIK-MODULAR.COM
SPUTNIK MODULAR
QUAD VCF/VCA
SPUTNIK MODULAR
SIGNAL INPUTS
OUT
ODD
EVEN
ALL
OUT 4
OUT 3
OUT 2
OUT 1
VCA
IN 1
0 FULL
CV
VCF
COMBO
VCA
IN 2
0 FULL
CV
VCF
COMBO
VCA
IN 3
0 FULL
CV
VCF
COMBO
VCA
IN 4
0 FULL
CV
VCF
COMBO
Page 2
QUAD VCF/VCA
SPUTNIK-MODULAR.COM
SPUTNIK MODULAR
TABLE OF CONTENTS
SPECIFICATIONS
INSTALLATION
DESCRIPTION
DIAGRAM
WARRANTY
3
4
5
6
7
Page 3
QUAD VCF/VCA
SPUTNIK-MODULAR.COM
SPUTNIK MODULAR
SPECIFICATIONS
FORMAT:
Eurorack
DIMENSIONS:
18HP, 28mm deep
INTERNAL AND EXTERNAL SIGNALS (3.5mm Jacks):
CV: 0-5V, AUDIO: +/-5V
MAX CURRENT:
+12V: 50mA
-12V: 70mA
Page 4
QUAD VCF/VCA
SPUTNIK-MODULAR.COM
INSTALLATION
Remove module from packaging.
Power down your modular synthesizer and disconnect the power
cable from the wall outlet.
Attach the included power cable to the module’s power connector and
connect the other end to the power distribution bus in your EuroRack
synthesizer case. If you have a bi-colored ribbon cable the red stripe
should be on a same side with a bold white line on a pcb. In case if you
have a rainbow-colored ribbon cable the key is brown. Connector also
has a key which should match sikscreen on a pcb.
Position the module on the mounting rails in your EuroRack case and
screw down mounting screws. Power up! If your case does not turn on
properly then you have installed the module incorrectly. Simply power
down and make sure to follow the diagram when reconnecting the
module.
1
2
3
4
BI-COLORED RIBBON
WHITE STRIPE
–12V
RAINBOW RIBBON
WHITE STRIPE
–12V
KEY
SPUTNIK MODULAR
Page 5
QUAD VCF/VCA
SPUTNIK-MODULAR.COM
The SPUTNIK QUAD VCF/VCA is a four channel, vactrol-based “lopass”
gate with four independent outputs, a mix output, and two sub-mix
outputs. Each of the four channels has a selectable switch for VCF, COMBO,
and VCA modes. In VCF mode that channel will act as a non-resonant -6db
low pass filter with the cutoff frequency controlled by the control knob and
by a unipolar CV input. Switching the channel to VCA mode will allow for
control of the amplitude of the input signal (gain varies from -120db to
+3dB).
Switching to COMBO mode allows for simultaneous control of amplitude
and timbre by the CV input or by the control knob.
Outputs include individual channel signal outs, an ALL output (all outputs
summed for mixing), an ODD out (outputs 1 and 3 summed) and an EVEN
out (outputs 2 and 4 summed).
SPUTNIK MODULAR
DESCRIPTION
Page 6
QUAD VCF/VCA
SPUTNIK-MODULAR.COM
SPUTNIK MODULAR
SIGNAL INPUTS
Accepts any AC-coupled
audio signal for processing
(line level or 10V
peak-to-peak modular
level).
CV INPUTS
Input for DC-coupled
control voltage (0V to 5V).
CV will control the
processing of audio
depending on channel
mode.
3-WAY MODE
SWITCH
Switches channel between
VCF (low pass filter),
COMBO (controls spectral
response and gain), VCA
(volume/amplitude gate)
response modes.
CONTROL
KNOB
Allows for manual
control of timbre,
amplitude, or both.
INDIVIDUAL
OUTPUTS
Audio outputs for
individual channels.
ALL
OUTPUTS
Audio outputs for
all channels
summed for mixing
via control-voltage
or manually using
the control knob.
ODD
OUTPUTS
A mix output of
channels 1 and 3
only.
EVEN
OUTPUTS
A mix output of
channels 2 and 4
only.
Page 7
QUAD VCF/VCA
SPUTNIK-MODULAR.COM
WARRANTY
This product is covered by the Sputnik Modular warranty, for one year
following the date of purchase. This warranty covers any defect in the
manufacturing of this product. This warranty does not cover any damage
or malfunction caused by incorrect use – such as, but not limited to, power
cables connected backwards, excessive voltage levels, or exposure to
extreme temperature or moisture levels.
The warranty covers replacement or repair, as decided by Sputnik Modular.
Please contact customer service via our website
(www.sputnik-modular.com) for a return authorization.
SPUTNIK MODULAR
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