A-155
Analog / Trigger Sequencer
System A - 100
doepfer
8
• Glide Ctrl.
: The glide function is active whenever
the control signal input here is “low”.
H
: If nothing’s connected to the
socket, glide function is active!
• S&H Ctrl.
: This is the socket for the digital
Sample & Hold control input.
Whenever a "high" control signal is
sensed, the analog CV output is held
at the same level until the control si-
gnal goes low. Usually one of the trig-
ger rows would be patched in to this
socket.
P
The purpose of this ‘hold’ function becomes
clear if you e.g. want to hold the pitch of a
VCO over 2 or more steps. In this case the
S&H function takes care that the CV is held
over the regarding steps provided that the
S&H control input is connected to one of the
trigger outputs and the trigger switches are
set suitable. Without the use of the S&H you
would have to adjust the potentiometers of
the regarding steps very careful to obtain
exactly the same voltage for the successive
steps.
$
External CV / Audio Inputs
The inputs
$
for the
lower analog CV row
can be
used to patch in any
control voltage or audio signal.
For any step used in this way, the CV knob
5
then acts
as an attenuator for the signal input.
5. User examples
Module A-155 has limitless potential. All sorts of very
complex sequences, modulation and audio manipula-
tion are possible. In the following examples of typical
patches, there’s only room to mention a few of the
most common uses.
Fig. 3 shows a
standard patch
- a six-step sequence
with pitch, filter and glide control, to give an example of
some of the typical control possibilities the A-155
provides.
The
upper analog CV row
is controlling the
pitch
of
the VCO. In this example, output "Post Out 1" has
been chosen, because the glide function is being
used.