Assembly & installation, Controls & operation, Modifications – Xaoc Devices Karl Marx Stadt User Manual
Page 2
ASSEMBLY & inSTALLATiOn
The Karl Marx Stadt unit
needs the Doepfer DIY Synth
board to work, it is sold
separately. If you have bought
a bundle, chances are that the
dealer has already mounted
the board for you. If not – the
installation is extremely easy
and straightforward, just
please read the following steps
carefully to avoid problems.
1. If your DIY Synth is
equipped with a tempco,
unplug its cable from the
onboard socket.
2. Plug the tempco connector
in the respective socket
1
on the back on the KMS unit.
It is located to the left of the
power header
2
.
3. Now, push the DIY Synth
on all the headers
3
, very
gently. Observe the goldpins
carefully to avoid bending
them. Please pay an extra
attention to the single +5V
goldpin
4
.
4. Clear 42 hp space in your
cabinet and turn the power
off. Now plug in the ribbon
cable
5
to the bus board,
observing the red stripe
orientation. It indicates the
–12V rail on the module (dot
mark)
2
and the bus board.
CAUTION! Unlike the oth-
er Xaoc modules, the KMS
is NOT secured against
reversed power connection!
5. Mount the screws and turn
your system back on. The
slider LEDs should light up.
The KMS is ready to go!
COnTROLS & OPERATiOn
The panel has been laid out in
most obvious monosynth style
manner. We took advantage
of all the internal patchpoints
provided by Doepfer. Also,
there are normalled connec-
tions made behind the panel
so you can use the KMS as a
selfcontained analog synth
voice without even plugging
any patch cables in. These fixed
connections are marked by
with respective function typed
within the
BLACk BOXES
. Of course,
the real fun starts when you
break them by simply patching
anything into their respective
input jacks.
The synth consists of 7 mod-
ules: VCO
7
, LFO
8
, VCF
9
,
VCA
10
, ADSR
11
, slew limiter
12
and inverter
13
. All of these
can be used independently. For
further information, please re-
fer to DIY Synth’s own manual.
MODIFICATIONS
We’ve made some minor mods
to the application suggested by
Doepfer. Fixed VCF outputs are
now mixed in different configu-
ration and the VCA offset can
be adjusted by the trimpot
6
on the back.
By design, the VCF resonance is
provided by feeding the output
back in. We found it fun to
actually open up the feedback
loop for routing the signal out-
side (any output) and back
(
res
fdbck
in
socket
14
). Now,
you can obtain some interest-
ing results with external treat-
ment through effects, filters,
etc. Happy experimenting!
•KARL MARX STADT•
2013 DOEPFER DIY SYNTH BOARD
XAOC DEVICES EDITION
FM LIN
0
10
PuLSE WIDTH
0
10
10
LFO TRI
FM EXP
0
0
10
1V·OCT
SLEW
LFO TRI
PW MOD 1
0
10
COARSE FREQuENCY
10
9
1
2
8
3
7
4
6
5
0
FINE TuNE
VCF
VCO
0
4
8
2
6
10
10
VCO PuLSE
AuDIO 2
0
10
CV 2
LFO TRI
0
0
VCO SAW
AuDIO 1
10
0
CV 1
ADSR
10
VCA
0
4
8
2
6
10
0
4
8
2
6
10
0
4
8
2
6
10
CuTOFF FREQuENCY
10
9
1
2
8
3
7
4
6
5
0
RESONANCE
CV 1
ADSR
0
10
CV 2
GAIN
0
10
VCF HP
AuDIO 3
0
10
VCF LP
AuDIO 1
VCF BP
AuDIO 2
10
0
10
0
LFO TRI OuT
LFO PuLSE OuT
CV 1
CV 2
VCA OuT
AuDIO IN 1
AuDIO IN 2
AuDIO IN 3
ADSR OuT
GATE IN
INV OuT
INV IN
SLEW OuT
SLEW IN
PuLSE OuT
PW MOD
SAW OuT
1V·OCT
FM EXP
SYNC
FM LIN
AuDIO IN 1
AuDIO IN 2
CV 1
CV 2
RES FDBCk IN
LP OuT
BP OuT
HP OuT
L·N·H OuT
LO
W
FRE
QuENCY OSCILLA
TOR
HI
LO
STD
L·N·H MIX
L
H
N
A
R
S
D
EN
VEL
OPE SPEED RANG
E
HI
LO
STD
LFO SPEED
RE
D
ST
RI
PE
RE
D
ST
RI
PE
6
3
3
4
5
3
3
10
11
1
2
14
12
8
13
7
9