User guide

doepfer
System A - 100
Modular Vocoder
A-129 /3/4
1
1. Introduction
The A-129 /x series of modules is a modular voco-
der. 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-
tors
, and a
Slew Limiter
(which works on all the
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
A-129 /4
(
Slew Limiter Controller
) as
well. It has several dedicated functions, and gives you
control over the following slew limiter functions:
•
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.