Doepfer A-129-1/2 Vocoder Basic Modules - Manual (Page 5)

doepfer System A - 100 Modular Vocoder A-129 /1/2
5
H In most standard vocoders the voltage si-
gnals from the analysis section are fed
straight into the synthesis section. With the
A-129 modular vocoder, they are patched
externally via 15 leads.
That means it’s possible to modify the control
voltages by patching any sensible choice of
module (for instance attenuators, slew li-
miters, LFO, CV-MIDI / MIDI-CV interfaces,
inverters, etc.), between the analysis and
synthesis sections. Not-so-sensible choices
may produce interesting results, too.
It’s also possible to interconnect control vol-
tages to synthesis section inputs in a non-
standard way, so that for instance the output
from a low frequency band from the speech
signal can control a high frequency element
of the carrier signal.
With a modular vocoder, the only constraints
on experimentation are the limits of your
imagination (and you can also always have
a look at chapter 6, User examples).
4. In / Outputs
! Speech In
Socket ! is the input to the analysis section. This is
where the speech signal is patched in.
Don’t forget that the speech signal needs to be at the
high level the A-100 uses internally. Plugging a
microphone directly in to the vocoder won’t work.
You need to use an A-119 External Input module, into
which you can plug a microphone or other external
signal. Then the output of the A-119 can be patched
into input socket ! on the analysis section.
" Low Pass • Band 1 to Band 13 • High Pass
These are the CV outputs " from the analysis sec-
tion, whose voltages are determined by each filter’s
envelope follower. Each CV output has an LED
connected to it, showing the strength of the voltage
generated.