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CS-8 Series
Owners' manual
COOK
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CS-8 Series COOK Rev1.3, Feb. 2019
User manual by Carsten Schippmann
Graphic design CS-8 Series: Carsten Schippmann
Concept and development: Carsten Schippmann
English translation by Carsten Schippmann
Contact:
Schippmann electronic musical instruments
Dipl.-Ing. Carsten Schippmann
Wartburgstr. 8
D-10823 Berlin
Web: www.schippmann-music.com
Email: [email protected]
The manufacturer
Schippmann electronic musical instruments
is constantly
striving for improvements and developments of their products. Therefore, we
reserve the right to change technical specifications which improve our
products at any time without notice. This includes the look of the unit which
might differ from pictures in this manual.
No part of this publication is to be reproduced, transmitted, transcribed or
translated in any form or by any means whatsoever without written
permission by
Schippmann electronic musical instruments
.
2018, Schippmann electronic musical instruments, errors excepted, subject
to change without prior notice.
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CS-8 Series COOK Rev1.3, Feb. 2019
PREFACE
First of all, congratulations on the purchase of this 3U Eurorack synthesizer
module. This manual contains a condensed description of the functionality
and addresses users with a certain level of elementary technical knowledge.
The CS-8 COOK is a more persuasive VCA mono compressor with softknee
characteristic and adjustable Side Chain input. It is based on the known "ebbe
und flut" architecture, where only one knob controls the Threshold, Make-up
Gain and Ratio at the same time. It is designed for mounting into a 3U Eurorack
with an internal +/- 12V power supply.
Compared to the "ebbe und flut" the time constant (Attack/Release) is now
continuously adjustable over a wide range and moreover another peculiarity is
added one not meet in ordinary compressor designs, the parameter
"Response". This generates an overshooting, adjustable in 4 steps (height of
overshoot), of the RMS-converter in case of dynamic changes of the input
signal. By adjusting the time constant with the rhythmic timing very strong
pumping and compression effects are possible. Furthermore this compressor
is perfectly suitable as a bass-compressor down to lowest sub-frequencies.
Definitely a fun maker with a superior dynamic range!
Design and implementation meet highest technical standards concerning
usability, sound quality, and signal-to-noise ratio. The front panel is made from
powdered and printed piece of aluminium sheet metal of 2 mm gauge. The
entire design and production work was done in Germany.
Made in Germany
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CS-8 Series COOK Rev1.3, Feb. 2019
1. WARRANTY .........................................................................................................................4
1.1 Limited Warranty ....................................................................................................4
1.2 Terms of Warranty ..................................................................................................4
1.3 Warranty transferability ......................................................................................4
1.4 Claim for damages ..................................................................................................4
2. CE AND FCC COMPLIANCE STATEMENTS ...............................................................5
3. DISPOSAL ............................................................................................................................5
4. SAFETY INSTRUCTIONS .................................................................................................6
5. MAINTAINANCE/ CLEANING ........................................................................................7
6. GETTING STARTET............................................................................................................7
6.1 Unpacking ..................................................................................................................7
6.2 Installation .................................................................................................................7
7. CONTROLS ...........................................................................................................................8
7.1 Front panel .................................................................................................................8
7.2 Back ...............................................................................................................................9
7.3 Initial operation .................................................................................................... 10
8. MODULE DESCRIPTION ............................................................................................... 11
Structure .......................................................................................................................... 11
Input .................................................................................................................................. 12
Ratio/Threshold/Make-up Gain ............................................................................. 12
The RMS-Converter and Response ....................................................................... 13
A/R Time........................................................................................................................... 16
Side Chain ....................................................................................................................... 17
Output .............................................................................................................................. 1 7
9. TECHNICAL DATA AND SIGNAL VALUES ............................................................. 18
9.1 Technical Data (in general) .............................................................................. 18
9.2 Signals and ratings .............................................................................................. 18
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CS-8 Series COOK Rev1.3, Feb. 2019
1. WARRANTY
1.1 Limited Warranty
Schippmann electronic musical instruments
warrants the mechanical and
electronic components of this product for a period of two (2) years from the
original date of purchase, according to the warranty regulations described
below. If the product exhibits any faults within the specified warranty period
that are not excluded from this warranty,
Schippmann electronic musical
instruments
shall, at its discretion, either replace or repair the product. This
warranty exists in addition to the general terms of business of the
manufacturer
Schippmann electronic musical instruments
.
1.2 Terms of Warranty
Schippmann electronic musical instruments
reserves the right to execute
warranty services only if the product comes with a copy of the dealer’s original
invoice. Final discretion of warranty coverage lies solely with
Schippmann
electronic musical instruments
. Any
Schippmann electronic musical
instruments
product deemed eligible for repair or replacement under the
terms of this warranty will be repaired or replaced within 30 days after
receiving the product at
Schippmann electronic musical instruments
.
Damages or defects caused by improper handling or opening of the unit by
unauthorized personnel (user included) are not covered by this warranty.
Products which do not meet the terms of this warranty will be repaired
exclusively at the buyer´s expense and returned C.O.D. with an invoice for
labour, materials, return shipping, and insurance. Products repaired under
warranty will be returned with shipping prepaid by
Schippmann electronic
musical instruments
. Outside Germany, products will be returned at the
buyer´s expense.
1.3 Warranty transferability
This warranty is extended to the original purchaser and cannot be transferred.
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CS-8 Series COOK Rev1.3, Feb. 2019
Schippmann electronic musical instruments
does not accept claims for
damages of any kind, especially consequential loss or damage, direct or
indirect of any kind however caused. Liability is limited to the value of this
product. The general terms of business drawn up by
Schippmann electronic
musical instruments
apply at all times.
Please note: The controls and switches or others are programming facilities
are no real-time controllers! Tweak them carefully since we cannot be held
liable for “abused” potentiometers and switches.
2. CE AND FCC COMPLIANCE STATEMENTS
This device has been tested and deemed to comply with the DIN EN 60065
standards.
This device has been tested and deemed to comply with the requirements,
listed in FCC Regulations, part 15. The device complies with EN 55103-1 and
EN 55103-2 standards.
Because of the entirely analogue construction, this device does not generate
radio frequencies and will not interfere with radio frequencies generated by
other electronic devices.
3. DISPOSAL
This device has been manufactured to RoHS-standards, in compliance with the
requirements of the European parliament and council and is thus free of lead,
mercury, and cadmium.
!! Notice: This product is still special waste and is not to be disposed of
through regular household waste !!
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CS-8 Series COOK Rev1.3, Feb. 2019
4. SAFETY INSTRUCTIONS
BEFORE USING THIS PRODUCT FOR THE FIRST TIME, PLEASE READ THE
ENTIRE USER MANUAL THOROUGHLY.
• PLEASE AVOID SHARP BENDING OF ANY CORDS AND CABLES.
• CORDS SHOULD NOT BE INSTALLED WITHIN THE REACH OF CHILDREN
OR PETS.
• DO NOT TREAD THE ENCLOSURE OF THE PRODUCT, DO NOT PLACE
HEAVY OBJECTS ON IT.
• BEFORE REMOVING THE PRODUCT FROM THE RACK, PLEASE
DISCONNECT THE POWER PLUG AND ALL OTHER CABLE
CONNECTIONS.
• PLEASE DISCONNECT THE POWER PLUG FROM THE OUTLET IN CASE OF
A THUNDERSTORM.
• NEVER OPEN THE ENCLOSURE OF THE PRODUCT! NEVER TRY TO
MODIFY THE INTERNAL CIRCUITRY! ONLY QUALIFIED SERVICE
PERSONNEL IS ALLOWED TO OPEN THE ENCLOSURE.
• DO NOT PLACE OPEN FIRE ON TOP OF THE PRODUCT (CANDLES, ASH
TRAYS, HOT THAI CURRIES ETC).
• NEVER EXPOSE THE PRODUCT TO WATER, BEER, OR MOISTURE.
• ADULTS ARE TO MAKE SURE THAT CHILDREN FOLLOW ALL SAFETY
INSTRUCTIONS. SAME THING GOES FOR PETS.
• AVOID MECHANICAL STRESS OR IMPACT. DO NOT DROP THE PRODUCT;
EVEN IF THERE IS A CONTROL LABELLED "DROP"!.
• DO NOT USE THE PRODUCT WITH TOO MANY OTHER ELECTRONIC
DEVICES RUNNING FROM ONE SINGLE OUTLET, ESPECIALLY IN
CONNECTION WITH EXTENSION CORDS. DO NOT ATTEMPT TO SAVE
MONEY ON CHEAP SOLUTIONS. BUY PROPER HIGH-DUTY POWER
DISTRIBUTORS AND CORDS!
• NEVER USE EXTENSION CORDS WITH LESS MAXIMUM LOAD THAN THE
TOTAL POWER CONSUMPTION OF ALL DEVICES CONNECTED TO A
SINGLE POWER OUTLET COMBINED. OVERLOADING EXTENSION CORDS
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CS-8 Series COOK Rev1.3, Feb. 2019
BOTH MIGHT CAUSE SERIOUS DAMAGE TO AUDIO EQUIPMENT
AND EAR-DRUMS!
5. MAINTAINANCE/ CLEANING
• BEFORE CLEANING THE PRODUCT, PLEASE DISCONNECT THE POWER
PLUG FROM THE OUTLET OR DISCONNECT THE MODULE FROM ITS
POWER CONNECTOR BY PULLING THE FLAT RIBBON CABLE.
• USE A DRY OR SLIGHTLY MOIST CLOTH OR COMPRESSED AIR FOR
CLEANING. NEVER USE ANY CLEANER OR THINNER (E.G. PAINT THINNER
OR ACETON). PRINTS AND PAINTWORK WILL IMEDIATELY BE
DESTROYED!! ALSO AVOID ALCOHOL (ISOPROPYLIC), GAS, SPIRITS
(SCOTCH SINGLE MALTS, FOR A START) OR ABRASIVE HOUSEHOLD
CLEANERS!
6. GETTING STARTET
6.1 Unpacking
The box should contain the following items:
- 1 x CS-8 Series COOK 3HU rack-mount module
- 1 x Ribbon cable (20 cm length with two 16 pole IDC-connectors)
- 4 x M3 screws
- 4 x polypropylene washers
- this owners’ manual
If the content of the box turns out to be incomplete, please get in touch with
your dealer or
Schippmann electronic musical instruments
immediately. In
case of damage caused in transit, please get back to the responsible carrier
and
Schippmann electronic musical instruments
immediately. We will support
you in this case.
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CS-8 Series COOK Rev1.3, Feb. 2019
electronics. Thus certain parameters may be temperature-sensitive. We
recommend placing the unit away from heat sources such as radiators, lamps
or other units that produce heat (e.g. power amps or internal power supplies).
7. CONTROLS
7.1 Front panel
Fig. 1 shows the front panel with consecutively numbered controls and jacks.
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CS-8 Series COOK Rev1.3, Feb. 2019
1. Input controller – attenuates the input signal at
jack 6
between 0 and 1
2. Side Chain controller – attenuates the AC input signal at
jack 8
between
0 and 1.
!!ATTENTION: For regular compressor operation this controller is to
set at FULL CW!!
3. Response 4-pos. rotary switch – determines the height of overshoot of
the RMS-converter, which controls directly the VCA
4. A/R Time controller – adjusts the time constant of the RMS-converter for
Attack und Release at the same time
5. Th/Rt controller – adjusts at the same time the level starting point of
compression (Threshold), the Make-up Gain and the Ratio
6. Input jack (signal input) – routes the applied AC signal via
Cont. 1
to the
VCA input of the compressor
7. Thres/Ratio jack (CV input) – wirkt auf die Parameter, die auch mit
Pot. 5
eingestellt werden; 0 V -+5V entsprechen dem Links-/Rechtsanschlag
8. Side Ch jack (signal input) – routes the applied AC signal via
Cont. 2
to
the input of the RMS-converter
9. Time jack (CV input) – adjusts the time constant of the RMS-converter for
Attack und Release at the same time over a wide range as the
corresponding controller
Cont. 4
; 0 V -+5V corresponds to full CCW to full
CW
10. Out jack (signal output) – provides the compressed output signal
7.2 Back
Fig. 2 shows the back of the module with consecutively numbered elements.
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Fig. 2 back
1. 16 Pin power supply box-header
2. P1 Gain 12-gauge-trimmer – adjusts output level at high compression to
0 dbV (1 Vrms)
7.3 Initial operation
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Pin 1, 2 = -12 V (labelled with a triangle)
Pin 3-8 = GND (ground, 0 V), located outward on all jacks
Pin 9, 10 = +12 V
Pin 11-16 = not in use
To hook up power to the module, connect one of the IDC-jacks of the included
flat ribbon cable to the connector (refer to fig. 2). Observe guide key for the
polarity of the connector in order to avoid pin reversal. The red tag of the
cable is to match the triangle-label.
8. MODULE DESCRIPTION
Structure
RMSConv
OUT
Side Ch
(8)
IN
0.75
Response
(3)
Input
(6)
24 8
Input
(1)
VCA
Side Ch
(2)
A/R
Time
(4)
A/R Time
(9)
+5 V
Thres/
Ratio
(7)
Th/Rt
(5)
+5 V
Out
(10)
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and the parameters
A/R Time, Threshold/Ratio
and
Response
the VCA is
controlled by the RMS-converter, leading finally to dynamic compression.
Input
This section includes the jack 6 (Input) and the controller 1 (Input). The input
signal applied at
jack 6
is routed AC-coupled to
Cont. 1
where it get an
attenuation between 0 (-∞ db, full CCW) and 1 (0 db, full CW). To obtain a
signal gain of 1 (
Cont. 5
at full CCW) at the signal output
Out Cont. 1
has to be
set to full CW.
Ratio/Threshold/Make-up Gain
This section includes the controller 5 (Th/Rt) and the jack 7 (Thres/Ratio). A
picture paints a thousand words. Figure 4 shows a family of curves for
corresponding input-to-output levels at rising Thres/Ratio values.
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At the left side (at -100 dbV) one can see the rising the Make-up Gain. It is for
the top graph 50 db (
Cont. 5
at full CW). The point where a graph drops to a
lower slope is called Threshold. In the figure for each curve it will be shifted
from right (high input levels) to left (very low input levels), turning
Cont. 5
from left to right. The softknee character is maintained at any time, but cannot
fully evolve above 0 dbV (input) at low positions of
Cont. 5
. The Ratio values
printed on the front panel are taken at the input level interval +10 dbV - 0 dbV
and serves the orientation. The scale values Th/Rt are valid for
Cont. 1
(input)
at full CW, otherwise the whole graphic will be shifted to the right, i.e. the
input level, which drives the compressor is crucial for the result!
The RMS-Converter and Response
The RMS-converter is always computing the root-mean-square of the
incoming audio and is so providing the most important process variable for a
compressor. The 4-position rotary switch 3 (Response) selects an
overshooting response of the RMS-converter, especially at sudden level
changes. The height of the overshoot increases with higher scale values. In
concrete terms the 4 db value of the
Response
scale means a total overshoot
(first peak - first valley) of 4 decibel. This fact is reflected by the corresponding
output signal. Figure 5a, 5b, 5c and 5d shows this behavior for all 4
Response
values.
Every graphic is mapping three quantities. The top graph always shows an
incoming sinus signal of 500 Hz and an amplitude of 2.828 V, which equals a
root-mean-square of 1 Vrms. The signal is sudden starting at T = 0 and the
middle graph shows how the RMS-converter forms within a certain time
(Attack) the root-mean-square. The bottom graph shows the corresponding
output signal, where a high compression of about 10 is set. With rising
Response
values the overshoots increases. For a compressor the RMSconverter controls the VCA reverse. So, higher RMS values (corresponding to
high input levels) leading to a lower VCA gain and vice versa.
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Fig. 5a Response 0.75 db
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CS-8 Series COOK Rev1.3, Feb. 2019
Fig. 5c Response 4 db
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A/R Time
The controller 4 (A/R Time) and the jack 9 (Time) adjusts the Attack- and
Release times of the RMS-converter. Figure 6a shows the Attack phase and the
corresponding output signal. Because the incoming level increase in this
example is sudden and the RMS-converter is applied with a time constant,
namely the Attack time, the output firstly follows the incoming level increase
before it will be reduced.
Fig. 6a Attack
Figure 6b shows the conversely case for a sudden incoming level decrease. As
above the output firstly follows this level reduction because of the inertia of
the RMS-converter by the Release time. Because this is an automatic
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Fig. 6b Release
Side Chain
Jack 8 (Side Ch) has a switching contact, which is cutting (by plugging) the
input signal at
jack 6
from the RMS-converter. The RMS-converter, now,
receives its AC-input signal, which root-mean-square it is computing to control
the VCA from
jack 8
. Controller 2 (Side Chain) attenuates the input signal at
jack 8
between 0 and 1. Even when not using
jack 8
the input signal (
jack 6
)
goes always via the
controller 2
to the RMS-converter input.
So, controller 2 has to be set to full CW for regular compressor operation!
Controller 2
in mid position, e.g., the graphic Fig. 4 would be shifted by 6 db to
the right and up!
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9. TECHNICAL DATA AND SIGNAL VALUES
9.1 Technical Data (in general)
Input- and output-jacks: mono jack jacks 3.5 mm (1/8”)
Input jacks (except jack 8) have grounded switch (0 V)
Power: -12 V / +12 V (polarity
protection)
Power consumption: typ. +35 mA/-45 mA (@ ±12 V)
Proper ambient temperature: 0 °C – +55 °C / 32F – 131F
Net weight (module only): approx. 100 g / 0,22 lbs
Dimensions (W x H x D): 10 PU (50.5 mm) x
3 HU (128.5 mm) x 40 mm
Installation depth (behind the panel) <20 mm
9.2 Signals and ratings
Maximum input voltage at jacks (7, 9): ±10 V
Maximum input voltage at jacks (6, 8): ±20 V
Output noise:
Out (Make-up Gain = 0 db): 12 µVrms ≅ -98 dbV
Out (Make-up Gain = +30 db): 60 µVrms ≅ -84 dbV
Out (Make-up Gain = +50 db): 1.1 mVrms ≅ -59 dbV
Dynamic range: 120 db
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