Doepfer A-129-3-4 User Manual
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System A - 100
Modular Vocoder
A-129 /3/4
1. Introduction
The A-129 /x series of modules is a modular vocoder. The crucial components are the A-129 /1
(analysis section) and A-129 /2 (synthesis section).
Module A-129 /3 adds a Slew Limiter to the vocoder.
It includes 5-way Attenuators, 5-way Offset Genera-
, and a
tors
voltages at the five CV inputs simultaneously).
Using the A-129 /3 just on its own, two functions are
available:
Attenuator: whatever signal is patched into the
•
CV input can be attenuated by your chosen amount
before being sent to the CV output. The attenuation
is set with a control knob.
• Offset Generator: whatever signal is patched into
the CV input will have an offset voltage added to it
before being sent to the output. The offset is
variable with a control knob.
To use the Slew Limiter section of the 129 /3, you need
to have module
well. It has several dedicated functions, and gives you
control over the following slew limiter functions:
Slew Limiter
A-129 /4 (Slew Limiter Controller
(which works on all the
) as
Manual control of the slew rate
•
CV control of the slew rate, with an input attenuator
•
• Choice of three functions: "Follow", "Slew" and
"Freeze"
• “Freezing” the output voltages for the duration of a
gate
H This set of functions is operated by the Slew
Limiter Controller, A-129 /4.
Usually, the slew limiter is patched between the CV
outputs of the analysis section and the CV inputs of
the synthesis section (see chapter 5, User examples).
You can also use module A-129 /3, particularly in
combination with A-129 /4, for other purposes. For
example, using the A-129 /2 synthesis section, you
can make a filterbank.
1
A-129 /3/4
Modular Vocoder
2. A-129 /3, /4 - Overview
System A - 100
doepfer
➀
A-129 /3
Attenuator Offset
CV In 1
0
CV In 2
0
CV In 3
0
CV In 4
0
CV In 5
0
Slew Control Input
Vocoder Slew-Limiter
CV Out 1
10
10
10
10
10
10
0
CV Out 2
10
0
CV Out 3
10
0
CV Out 4
10
0
CV Out 5
10
0
➁
A-129 /4
SLC
Slew Limiter Controller
Free ze
Ctr. Input
Freeze
Manual
Slew
Rate
Slew CV
Slew
Follow
0
0
Slew
Control
Outputs
10
10
➂
➃
➄
➅
2
doepfer
System A - 100
Modular Vocoder
A-129 /3/4
A-129 /3
In- / Outputs:
CV In 1 ... CV In 5
!
CV Out 1 ... CV Out 5
"
Slew Control Input : Slew rate CV input; to
§
Controls:
Attenuator : Attenuator for the CV input
1
2 Offset : Offset control for the CV
: CV inputs
: CV outputs
access the slew limiting capabilities, patch the A-129 /4
output & into it.
output
A-129 /4
In- / Outputs:
Freeze Control Input
$
Slew CV :Slew rate control voltage
%
Slew Control Outputs: 3 internally linked CV out- puts
&
Controls and indicators:
Switch : Selector switch (3-position)
3
4 Manual Slew Rate : Knob for manual control of
Slew CV : Attenuator for output
5
6 LED : Indicator showing slew rate
: Gate input for controlling the
freeze function
input
to control slew rate
to choose "Freeze", "Slew",
or "Follow"
the slew rate
%
3
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