Stoel CV SOURCE User manual
MUSIC SYSTEMS
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CV SOURCE
USER MANUAL
FINE
FINE
COARSE
COARSE
CV 1
CV 1 CV 2
CV 2
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CV SOURCE
Warranty Information 3
Limited Warranty 3
Installation 4
Requirements 5
Front Panel Overview 6
Front Panel Overview 7
Operation 8
Application 8
Basic Operation 8
Example Configurations 9
Expanding Modulation Sources 9
Controlling Multiple Sources 9
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Table of Contents
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Warranty Information
Stoel Music Systems warrants that each of its products will be
free of manufacturing and assembly defects for a period of (1)
one year from the purchase date by the original owner. All
warranty claims require proof of purchase.
Stoel Music System does not warranty products due to improper
installation, including but not limited to, insufficient or defective
power supply voltages, installing the power cable backward
either on the module or buss board side, or static discharge that
damages 5V components.
If the product is deemed defective during the warranty period,
Stoel Music Systems will:
(1) repair or replace the product at no charge to the customer
except for shipping costs to Stoel Music Systems,
(2) or, refund the customer the amount of the original price.
If Stoel Music Systems determines the product is damaged by the
fault of the customer, Stoel Music Systems will:
(1) repair the product (please see repair rates here),
(2) or, send the product back at the expense of the customer.
Stoel Music Systems is not liable, either explicit or implied, for
any damages to persons or other equipment during the operation
of the product.
For warranty or repair requests, do not hesitate to contact
Limited Warranty
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Installation
STRIPE ►
STRIPE
►
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Eurorack Module
Bus Board
Before installation: UNPLUG EURORACK CASE!! Connect the 10-pin side of
the power cable to the module with the red stripe as indicated. Connect
the 16-pin side of the power cable to the bus board with the red stripe
facing down, as shown. Check to verify the location of the red strip on your
bus board. Mount the unit with the provided M3 screws within the rack
rails.
Failure to properly plug in your module could damage the unit or other
equipment.
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Requirements
HP Required
Mounting Depth
+12 Volt Current Draw
-12 Volt Current Draw
+5 Volt Current Draw
5V Requirement
Mounting Screws Required
Power Cable
Unit Weight
HP Required 4 HP
h 21mm
+12 Volt Current Draw 4ma
-12 Volt Current Draw 5ma
+5 Volt Current Draw 0ma
5V Requirement No
Mounting Screws Required 2
Power Cable 10 pin to 16 pin
Unit Weight 2 oz
Front Panel Overview
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FINE
FINE
COARSE
COARSE
CV 1
CV 1 CV 2
CV 2
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CV SOURCE
12
3
Front Panel Overview
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(1) The COARSE knob varies the control voltage (CV) from 0 to
+12 volts. Each COARSE knob corresponds to the CV out. In terms
of pitch on a 1V/octave scale, the coarse control spans over five
octaves.
(2) The FINE knob adjusts the control voltage with a range of +/-
0.5 volts. The purpose of the knob is to give the user more
refined control over the output control voltage. In terms of pitch
on a 1V/octave scale, the fine control spans one semitone plus 20
cents.
(3) The jacks are the CV OUT for each corresponding CV control.
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Operation
The sole purpose of the CV Source is to output control voltage to
manipulate other controls and devices within the system.
Application
For example, if the CV Source output (3) is plugged into the
frequency CV input of a filter, the CV source would add additional
CV to the filter frequency control. Suppose the filter frequency is
turned to the closed position (typically the 9 oʼclock position). In
that case, the CV Source will take the place of the frequency
knob. However, it seems ludicrous to replace an already
functioning control (the filter frequency) with another control,
right?
Letʼs say the user has the modular system arranged for two-
voice polyphony. This means that the patch has two oscillators,
two filters, two envelopes, and two voltage-controlled amplifiers.
If the user desires that each voice tracks one another, the CV
Source can help.
The CV OUT from the CV Source can be patched into a multiple, so
the CV is now available to various modules. In order to control
the filter frequency simultaneously with a single knob, patch the
CV into the CV frequency input. Turn the CV Input on the filter off
(if applicable). Now the user can control both filter frequencies
simultaneously with a single knob. The process can be repeated
for any module that requires CV control.
Basic Operation
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Example Configurations
Expanding Modulation Sources
Most all modulation sources do not have fine CV control. The
addition of the CV Source aids the user in accurately controlling
the desired function where there is none. (Fig. 1)
FINE
FINE
COARSE
COARSE
CV 1
CV 1 CV 2
CV 2
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CV SOURCE
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COARSE
TUNE
FINE TUNE
PULSE WIDTH MODPULSE WIDTH
CV 2
CV 1
SAW SAW TRIANGLE SINE -1 SUB -2 SUB -2 PULSE
CV 2 CV 3 PWM S SYNC H SYNC LIN FM
CV 3 LINEAR FM
STANDARD VCO
Fine control to PWM
Fig. 1
Fine control to LIN FM
Fig. 2
DISCRETE FILTER
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LEVEL
FREQUENCY
RESONANCE
CV 2 AMOUNT
CV 1 BP OUT
LP OUTAUDIO IN
CV 2
CV Source Controls
the frequency of the
filters simultaneously
FINE
FINE
COARSE
COARSE
CV 1
CV 1 CV 2
CV 2
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CV SOURCE
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DUAL MULTI
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DISCRETE FILTER
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LEVEL
FREQUENCY
RESONANCE
CV 2 AMOUNT
CV 1 BP OUT
LP OUTAUDIO IN
CV 2
DISCRETE FILTER
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LEVEL
FREQUENCY
RESONANCE
CV 2 AMOUNT
CV 1 BP OUT
LP OUTAUDIO IN
CV 2
Controlling Multiple Sources
If a user desires to control multiple modulation sources
simultaneously, the CV Source can act as a master control. Patch
the output of the CV Source to a multiple. Then patch into each
modulation control. Be sure any additional modulation source is
matched between each module to ensure consistent tracking.
(Fig. 2)
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Just make music
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