Schippmann CS-8 Series User manual

CS-8 Series
Owners' manual DTG

CS-8 Series DTG Rev1.3, July 2020
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User manual by Carsten Sc ippmann
Grap ic design CS-8 Series: Carsten Sc ippmann
Concept and development: Carsten Sc ippmann
Englis translation by Carsten Sc ippmann
Contact:
Sc ippmann electronic musical instruments
Dipl.-Ing. Carsten Sc ippmann
Wartburgstr. 8
D-10823 Berlin
Web: www.sc ippmann-music.com
Email: info@sc ippmann-music.com
T e manufacturer Sc ippmann electronic musical instruments is constantly
striving for improvements and developments of t eir products. T erefore, we
reserve t e rig t to c ange tec nical specifications w ic improve our
products at any time wit out notice. T is includes t e look of t e unit w ic
mig t differ from pictures in t is manual.
No part of t is publication is to be reproduced, transmitted, transcribed or
translated in any form or by any means w atsoever wit out written
permission by
Sc ippmann electronic musical instruments .
 2020, Sc ippmann electronic musical instruments, errors excepted, subject
to c ange wit out prior notice.

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PREFACE
First of all, congratulations on t e purc ase of t is 3U Eurorack synt esizer
module. T is manual contains a condensed description of t e functionality
and addresses users wit a certain level of elementary tec nical knowledge.
T e present DTG of t e CS-8 series is a very flexible and precise fully analogue
dual-transientgenerator, wit two time bases, eac . One of it generates t e
analog transient waveform, t e ot er provides eit er a Gate signal (0 V - +5 V)
of definite lengt , independently of t e input gate lengt or outputs
(externally switc able) t e incoming Gate transition by a definite delay time
(Delay).
All times, Gate lengt /delay, Attack, Decay, Release as well as t e Sustain level
are externally oltage controllable. T e Transient generator and also t e
Gate can be reset to 0 V output voltage, separately, via a jack. A Hold input
allows to "freeze" immediately t e current voltage output state of t e transient
output until enabling again. A Decay-Acti e output becomes " ig " active (+5
V) during t e Decay p ase. Moreover, it is possible by a jack to set t e Sustain
le el between -10 V and +10 V, meaning after ac ieving t e regular final
value of t e attack p ase (+5V) t e transient output will furt er rise to t e
ig er Sustain level above (>+5 V) asymptotically wit t e Decay time (second
attack p ase).
Conclusively, t e concept is well-rounded by a high-end-VCA for
continuously negative/positive output of t e transient waveform from -5 V
(inverse) crossing t e exact zero to +10 V final attack value.
Design and implementation meet ig est tec nical standards. T e front panel
is made from powdered and printed piece of aluminium s eet metal of 2 mm
gauge. T e entire design and production work was done in Germany.
Made in Germany

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1. WARRANTY .........................................................................................................................4 
1.1 Limited Warranty ....................................................................................................4 
1.2 Terms of Warranty ..................................................................................................4 
1.3 Warranty transferability ......................................................................................4 
1.4 Claim for damages ..................................................................................................5 
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 ............................................................................................................................ 13 
7.3 Initial operation .................................................................................................... 14 
8. MODULE DESCRIPTION ............................................................................................... 14 
8.1 Structure .................................................................................................................. 14 
8.2 The Gate/Delay section ...................................................................................... 15 
8.3 The en elope section .......................................................................................... 17 
8.4 Reset function ........................................................................................................ 18 
8.5 Hold & Decay acti e out .................................................................................... 19 
8.6 Combination of Gate section and En elope section ............................. 20 
8.7 Output VCA ............................................................................................................. 21 
8.8 Wa eform shaping .............................................................................................. 21 
9. TECHNICAL DATA AND SIGNAL VALUES ............................................................. 23 
9.1 Technical Data (in general) .............................................................................. 23 
9.2 Signals and ratings .............................................................................................. 23 

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1. WARRANTY
1.1 Limited Warranty
Sc ippmann electronic musical instruments warrants t e mec anical and
electronic components of t is product for a period of two (2) years from t e
original date of purc ase, according to t e warranty regulations described
below. However, as a gesture of goodwill we give a lifetime warranty on our
products. Nevert eless, t is will be always a decision in an individual case. If
t e product ex ibits any faults wit in t e specified warranty period t at are
not excluded from t is warranty,
Sc ippmann electronic musical instruments
s all, at its discretion, eit er replace or repair t e product. T is warranty exists
in addition to t e general terms of business of t e manufacturer Sc ippmann
electronic musical instruments .
1.2 Terms of Warranty
Sc ippmann electronic musical instruments reserves t e rig t to execute
warranty services only if t e product comes wit a copy of t e dealer’s original
invoice. Final discretion of warranty coverage lies solely wit Sc ippmann
electronic musical instruments . Any Sc ippmann electronic musical
instruments product deemed eligible for repair or replacement under t e
terms of t is warranty will be repaired or replaced wit in 30 days after
receiving t e product at
Sc ippmann electronic musical instruments .
Damages or defects caused by improper andling or opening of t e unit by
unaut orized personnel (user included) are not covered by t is warranty.
Products w ic do not meet t e terms of t is warranty will be repaired
exclusively at t e buyer´s expense and returned C.O.D. wit an invoice for
labour, materials, return s ipping, and insurance. Products repaired under
warranty will be returned wit s ipping prepaid by Sc ippmann electronic
musical instruments . Outside Germany, products will be returned at the
buyer´s expense.
1.3 Warranty transferability
T is warranty is extended to t e original purc aser and cannot be transferred.
No ot er person (retail dealer, etc) s all be entitled to give any warranty
promise on be alf of
Sc ippmann electronic musical instruments .

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1.4 Claim for damages
Sc ippmann electronic musical instruments does not accept claims for
damages of any kind, especially consequential loss or damage, direct or
indirect of any kind owever caused. Liability is limited to t e value of t is
product. T e general terms of business drawn up by Sc ippmann electronic
musical instruments apply at all times.
Please note: T e controls, switc es and jacks are programming facilities, no
real-time controllers! Tweak t em carefully since we cannot be eld liable for
“abused” potentiometers and switc es.
2. CE AND FCC COMPLIANCE STATEMENTS
T is device as been tested and deemed to comply wit t e DIN EN 60065
standards.
T is device as been tested and deemed to comply wit t e requirements,
listed in FCC Regulations, part 15. T e device complies wit EN 55103-1 and
EN 55103-2 standards.
Because of t e entirely analogue construction, t is device does not generate
radio frequencies and will not interfere wit radio frequencies generated by
ot er electronic devices.
3. DISPOSAL
T is device as been manufactured to RoHS-standards, in compliance wit t e
requirements of t e European parliament and council and is t us free of lead,
mercury, and cadmium.
!! Notice: This product is still special waste and is not to be disposed of
through regular household waste !!
For disposal, please contact your local dealer or Schippmann electronic
musical instruments

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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
CAN CAUSE FIRE.
•AVOID MECHANICAL STRESS ON JACKS AND KNO S / SWITCHES.
•PROTECT YOUR SPEAKERS AND EARS (!) AGAINST EXCESSIVE AUDIO

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LEVELS.
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
T e box s ould contain t e following items:
- 1 x CS-8 Series VCF1E 3HU rack-mount module
- 1 x Ribbon cable (20 cm lengt wit two 16 pole IDC-connectors)
- 4 x M3 screws
- 4 x polypropylene was ers
- t is owners’ manual
If t e content of t e box turns out to be incomplete, please get in touc wit
your dealer or
Sc ippmann electronic musical instruments immediately. In
case of damage caused in transit, please get back to t e responsible carrier
and Sc ippmann electronic musical instruments immediately. We will support
you in t is case.
6.2 Installation
Place t e unit on a clean, dry and sturdy surface, or use a suitable keyboard
stand or 19” rack. For 19” rack mounting, a suitable rack (3U Eurorack wit +/-
12V power supply rails) is required. T e CS-8 DTG uses discrete all-analogue
electronics. T us certain parameters may be temperature-sensitive. We

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recommend placing t e DTG away from eat sources suc as radiators, lamps
or ot er units t at produce eat (e.g. power amps or internal power supplies).
7. CONTROLS
7.1 Front panel
Fig. 1 s ows t e front panel wit consecutively numbered controls and jacks.

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Fig. 1

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1. Gate jack (input) – generates, caused by a 0 V -> +5 V transition, a +5 V
Gate signal of definite lengt at
jack (2) (Gate O) ; or outputs it by a
definite delay time at jack (2)
2. Gate O jack (output) – provides a +5 V Gate signal of definite lengt or by
a definite delay time in relation to t e Gate input (1)
3. G-Time controller – set t e Gate lengt in Gate mode or t e delay time in
delay mode, resp. between 50 µs to 10 seconds
4. 1 V/Dec. jack (input) – set by an external voltage t e Gate lengt /delay
time by a sensitivity of 1 V/decade, positive/negative voltage ->
s orter/longer by a factor of 10 per volt from t e current state (3)
5. Gt/Del jack (input) – selects between Gate mode and Delay mode,
+5 V -> Gate, 0V -> Delay; is tied by a switc ing contact to +5 V and is
unused in Gate mode
6. LED indicator – lig ts up in Delay mode firstly "red", w en a Gate signal is
incoming at
jack (1) and c anges to "green" w en t e Gate O at jack (2)
becomes active
7. Gt-Res jack (input) – reset, as long as a +5 V input is applied, t e active
Gate at jack (2 ) and in ibits a new start (1) (not active in Delay mode); is
tied by a switc ing contact to jack (8) (Env-Gate) and works inverse,
means a "low" (0 V) at jack (8) causes a reset!
8. En -Gate jack (input) – a +5 V starts t e envelope attack or maintaining
t e decay p ase; 0 V set t e envelope always into t e release p ase
9. 1 V/Dec. jack (input) – set by an external voltage t e Attack time by a
sensitivity of 1 V/decade, positive/negative voltage -> faster/slower by a
factor of 10 per volt from t e current state (10)
10. Attack controller – set t e Attack time between 100 µs to 20 seconds
11. LED indicator – s ows by its brig tness t e current envelope output
value during t e attack p ase, "green" at positive output values, "red" for
negative ones
12. En -Res jack (input) – reset by a 0 V -> +5 V transition t e envelope
output to 0 V and t e generator back to t e attack p ase; is tied by a
switc ing contact to
jack (8) (Env-Gate) and causes a reset wit t e
envelope start
13. Hold jack (input) – "freezes", as long as a +5 V signal is applied and eld,
t e envelope output to t e current voltage state
14. 1 V/Dec. jack (input) – set by an external voltage t e Decay time by a
sensitivity of 1 V/decade, positive/negative voltage -> faster/slower by a
factor of 10 per volt from t e current state (15)
15. Decay controller – set t e Decay time between 100 µs to 20 seconds

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16. Dec-Act. jack (output) - provides a +5 V signal during t e decay p ase
17. LED indicator – s ows by its brig tness t e current envelope output
value during t e decay p ase, "green" at positive output values, "red" for
negative ones
18. Sustain controller – set t e final value of t e decay p ase between
-100% (-5 V) und +100% (+5 V)
19. CV-Sus jack (input) - set by an external voltage of -5 V - +5 V (at middle
position of
(18) ) t e final value of t e decay p ase between -200% (-10 V)
und +200% (+10 V); decay becomes at >100% a second attack!
20. LED indicator – s ows by its brig tness t e current envelope output
value during t e release p ase, "green" at positive output values, "red" for
negative ones
21. Release controller – set t e release time between 100 µs to 20 seconds
22. 1 V/Dec. jack (input) – set by an external voltage t e release time by a
sensitivity of 1 V/decade, positive/negative voltage -> faster/slower by a
factor of 10 per volt from t e current state (21)
23. CV-VCA jack (input) - controls by an external voltage between -5 V - +10
V t e envelope amplitude between inverse (attack final value = -5 V) and
+10 V
24. VCA jack (output) - provides t e VCA controlled (23) envelope waveform
25. En Out jack (output) - provides t e envelope output wit a fix +5 V
attack final value
26. Gate jack (input) – generates, caused by a 0 V -> +5 V transition, a +5 V
Gate signal of definite lengt at
jack (27) (Gate O) ; or outputs it by a
definite delay time at jack (27)
27. Gate O jack (output) – provides a +5 V Gate signal of definite lengt or by
a definite delay time in relation to t e Gate input (26)
28. G-Time controller – set t e Gate lengt in Gate mode or t e delay time in
delay mode, resp. between 50 µs to 10 seconds
29. 1 V/Dec. jack (input) – set by an external voltage t e Gate lengt /delay
time by a sensitivity of 1 V/decade, positive/negative voltage ->
s orter/longer by a factor of 10 per volt from t e current state (28)
30. Gt/Del jack (input) – selects between Gate mode and Delay mode,
+5 V -> Gate, 0V -> Delay; is tied by a switc ing contact to +5 V and is
unused in Gate mode
31. LED indicator – lig ts up in Delay mode firstly "red", w en a Gate signal is
incoming at
jack (26) and c anges to "green" w en t e Gate O at jack (27)
becomes active

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32. Gt-Res jack (input) – reset, as long as a +5 V input is applied, t e active
Gate at
jack (27 ) and in ibits a new start (26) (not active in Delay mode); is
tied by a switc ing contact to jack (33) (Env-Gate) and works inverse,
means a "low" (0 V) at jack (33) causes a reset!
33. En -Gate jack (input) – a +5 V starts t e envelope attack or maintaining
t e decay p ase; 0 V set t e envelope always into t e release p ase
34. 1 V/Dec. jack (input) – set by an external voltage t e Attack time by a
sensitivity of 1 V/decade, positive/negative voltage -> faster/slower by a
factor of 10 per volt from t e current state (35)
35. Attack controller – set t e Attack time between 100 µs to 20 seconds
36. LED indicator – s ows by its brig tness t e current envelope output
value during t e attack p ase, "green" at positive output values, "red" for
negative ones
37. En -Res jack (input) – reset by a 0 V -> +5 V transition t e envelope
output to 0 V and t e generator back to t e attack p ase; is tied by a
switc ing contact to
jack (33) (Env-Gate) and causes a reset wit t e
envelope start
38. Hold jack (input) – "freezes", as long as a +5 V signal is applied and eld,
t e envelope output to t e current voltage state
39. 1 V/Dec. jack (input) – set by an external voltage t e Decay time by a
sensitivity of 1 V/decade, positive/negative voltage -> faster/slower by a
factor of 10 per volt from t e current state (40)
40. Decay controller – set t e Decay time between 100 µs to 20 seconds
41. Dec-Act. jack (output) - provides a +5 V signal during t e decay p ase
42. LED indicator – s ows by its brig tness t e current envelope output
value during t e decay p ase, "green" at positive output values, "red" for
negative ones
43. Sustain controller – set t e final value of t e decay p ase between
-100% (-5 V) und +100% (+5 V)
44. CV-Sus jack (input) - set by an external voltage of -5 V - +5 V (at middle
position of (43) ) t e final value of t e decay p ase between -200% (-10 V)
und +200% (+10 V); decay becomes at >100% a second attack!
45. LED indicator – s ows by its brig tness t e current envelope output
value during t e release p ase, "green" at positive output values, "red" for
negative ones
46. Release controller – set t e release time between 100 µs to 20 seconds
47. 1 V/Dec. jack (input) – set by an external voltage t e release time by a
sensitivity of 1 V/decade, positive/negative voltage -> faster/slower by a
factor of 10 per volt from t e current state
(46)

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48. CV-VCA jack (input) - controls by an external voltage between -5 V - +10
V t e envelope amplitude between inverse (attack final value = -5 V) and
+10 V
49. VCA jack (output) - provides t e VCA controlled (48) envelope waveform
50. En Out jack (output) - provides t e envelope output wit a fix +5 V
attack final value
7.2 Back
Fig. 2 s ows t e back of t e module wit consecutively numbered elements.
Fig. 2

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1. IC1 – pinned TG Modul
2. P1 12- gauge-trimmer – Attack time (DTG top) -> 100 µs
3. P2 12- gauge-trimmer – VCA out (DTG top) -> 0 V @ CV = 0 V
4. P3 12- gauge-trimmer – Attack time (DTG bottom) -> 100 µs
5. P4 12- gauge-trimmer – VCA out (DTG bottom) -> 0 V @ CV = 0 V
6. 16 Pin power supply box-header
7.3 Initial operation
T e power connector’s (6) pin-out in top view (refer to fig. 2) is assigned as
follows:
Bottom to top, left to rig t. T us pin 1 is located at bottom left, pin 2 above pin
1 etc. Pin 15 is at bottom rig t, pin 16 at top rig t.
Pin 1, 2 = -12 V (labelled wit 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 ook up power to t e module, connect one of t e IDC-jacks of t e included
flat ribbon cable to t e connector (refer to fig. 2). Observe guide key for t e
polarity of t e connector in order to avoid pin reversal. T e red tag of t e
cable is to match the triangle-label.
8. MODULE DESCRIPTION
8.1 Structure
T e DTG is a combination of a Gate module and an Envelope generator in
duplicate design. T e Fig. 3 s ows t e structure of one of t ese two designs. In
t e following piece by piece every parts will be described and as t e case may
be exemplified wit grap ics. Because of t e identity of t e generators t e
following descriptions are referring to t e elements 1-25 of t e front panel.
Hint 1: All digital input jacks (Gate, Gate-Reset, Gt/Del, Env-Gate, Env-Reset,
Hold) are so-called Sc mitt-Trigger inputs, meaning t ey can be fed wit any
analog (also negative) voltages (max. ±12 V). T e trigger point is about +3 V.

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Hint 2: A positive voltage at every of t e overall 8 CV-control jacks wit a scale
of 1 V/decade as an accelerating effect, means t at t e times of t e p ases
will be reduced by a factor of 10 wit every applied volt.
DTG's Gate
Gate-Reset Input
Delay p ase (red) /
active Gate (green)
Gate Gate O
Time
Gate Input
Gate mode (+5 V) /
Delay mode (0 V)
2 colour
LED
Gate Out
Gt-Res
positve
voltages
-> s orter
Inv
G-Time
+5 V
CCW
1 V/
Dec.
Gt/Del
+5 V
DTG's En
Env-
Gate
Env.
Gate
Input
Env-
Reset
Env.
Reset
Input
Hold
Hold Input
2 col.
LED
Attack
+5 V
CCW
1 V/
Dec. Decay
+5 V
CCW
1 V/
Dec. Sustain
+5 V
CW
-5 V
to
+5 V Release
+5 V
CCW
1 V/
Dec.
2 col.
LED
2 col.
LED
positve
voltages
-> faster
Time Time Time
positve
voltages
-> faster
positve
voltages
-> faster
Env output (attack)
pos. (grn)/ neg. (red)
Env output (decay)
pos. (grn)/ neg. (red)
Sustain
level
Env output (release)
pos. (grn)/ neg. (red)
-5 V
CV-VCA
VCA
Decay active
out
Env Out bipolar VCA Out
-5 V
factor 2
5 V in leads to 10 V out
Σ
-
+
Envelope curve
Fig. 3 Structure of t e DTG (one of two)
8.2 The Gate/Delay section
T is section includes t e panel elements 1-7 (26-32). T e jacks 1, 2, 5 and 7 are
digital and receives or sending 0 V/+5 V. Jack 1 is t e Gate input and jack 2

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t e Gate output. Jack 5 selects via a control voltage between "Gate" mode
and "Delay" mode. +5 V selects "Gate", 0 V selects "Delay". It lies via an internal
switc ing contact at +5 V and, so, pre-selects normally t e "Gate" mode. As
soon as a cable is plugged in, even if t e ot er end is open, t e "Delay"
function becomes active. Fig. 4 describes best t e functional principal of t e
Gate mode.
Voltage
time
Gate Reset
Gate in
+5 V
+5 V
+5 V
Gate
time
Gate Out
time
time
Fig. 4 Gate mode
As one can see, t e Gate lengt is always t e same, independently of t e
duration of t e input Gate signal at jack 1. T e Gate-Reset is only active in
Gate mode. T e referring jack 7 is connected internally via a switc ing contact
to jack 8 (En elope-Gate input), namely in erse! T e reason for t at will be
explained furt er down. For independently work of t e Gate in Gate mode
from t e envelope generator it needs a plug into jack 7 to untie t is internal
connection.
Fig. 5 s ows t e functional principal of t e Gate in Delay mode. If one can see,
no output will be generated w en t e incoming Gate is s orter t an t e Delay
time. So, it's a delayed 0 V→+5 V transition as long t e incoming Gate is eld
beyond t e delay time.

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T e LED (6) lig ts up "green" in Gate mode as long as t e Gate output (jack 2)
is active. In Delay mode LED (6) s ines basically not as long as no + 5 V are
applied at jack 1. Wit applying a +5 V signal t e LED lig ts up initially "red" as
long t e delay p ase persists and c anges to "green" w en t e Gate output
(jack 2) becomes active. Wit a 0 V at jack 1 t e LED goes off and t e output
(jack 2), too, immediately. T e Gate length or t e Delay time, resp., is
c angeable by controller 3 (<50 µs - >10 s ) or by a control voltage at jack 4
(1V/decade).
Voltage
Gate Out
Gate in
+5 V
+5 V
Delay
time
Delay
time
time
time
Fig. Delay mode
8.3 The en elope section
T e envelope section includes t e panel elements 8-25. Generally, it is a
classical Envelope generator wit te known pases "Attack",
"Decay"/"Sustain" and Release. Jack 25 provides t e envelope signal and is
normalized to +5 V final Attack value. T e Attack time can be set by controller
10 (100 µs - 20 s) and via a control voltage at jack 9 (1V/decade). T e same
scales are valid for Decay time (controller 15, jack 14) and for t e Release
time (controller 21, jack 22). T e Sustain alue can be set by controller 18
between +5 V (final Attack value) and -5 V. A control voltage at jack 19 (-5 V -
+5 V) will additively c ange t e Sustain value, t oug wit t e twice weig t. If
controller 18 is set to t e middle position an input voltage of ±2.5 V (jack 19)
will as t e same range as controller 18. A furt er increase of t e control
voltage up to +5 V will raise t e Sustain value beyond t e final Attack value up
to +10 V. Hence, t e Decay p ase becomes anot er rising p ase, converge t e

CS-8 Series DTG Rev1.3, July 2020
-18-
Sustain value asymptotically. A control voltage of down to -5 V leads to a
Sustain value of -10 V. T e LED's (11), (17) and (20) are monitoring t e related
p ases by rising and falling brig tness. For positive envelope output voltages
t ey lig t up "green" and "red" for negative ones. Fig. 6 s ows t e mentioned
relations ips.
Voltage
Env Out
+5 V
+10 V
+5 V Env Gate
-5 V
-10 V
Sustain
level
Attack Decay Release
sustain range
by controller
total
sustain
range
time
time
Fig. 6 Envelope ranges
8.4 Reset function
Jack 12 provides t e Reset input of t e envelope generator. T is jack is tied
via an internal switc ing contact to jack 8 (En -Gate), t e envelope's start
input. T at means wit a start gate signal at jack 8 t e envelope output will be
set to 0 V and return to t e Attack p ase, immediately, independently of any
states. Fig. 7 s ows t e effects of a reset, independently of jack 8 (En -Gate).
T e duration of t e reset pulse is no matter, because t e reset is done wit in
about 3 µs, so, t e reset pulse s ouldn't be s orter. Wit a plug at jack 12,
even open ended, t e internal connection to jack 8 will be untied. T e
envelope curve runs up and down, continuously wit out any jumps.