doepfer
System A - 100
MCV 16
A-191
1
H
Connecting the A-191 to the system bus
requires an
additional special power sup-
ply (+5 V / 50 mA)
.
1. Introduction
Module
A-191
is a
combination
of a
MIDI-CV inter-
face
and a
Shepard Generator
. Most of the controls,
indicators and in/outputs have a double function; there
is a switch which toggles between the two sets of
functions.
In use as a
MIDI-CV interface,
13
of the 16 control
voltage outputs are dedicated to sending voltages
converted
from a particular MIDI controller
(such as
Mod Wheel, Volume, Pitch Wheel, Aftertouch, etc.).
Controller messages on your
chosen MIDI channel
are converted into voltages in a range from 0 to 5 V.
The other three sockets output an
internal LFO
gene-
rated in sync with MIDI clock, in three waveforms:
sawtooth, triangle
and
rectangle
.
In use as a Shepard Generator, the sockets output
eight different phases each
of a
triangle
and
sa-
wtooth
wave. Using a variety of modules, the Shepard
Generator can create some interesting psycho-
acoustic effects.
All A-191 settings can be
saved
into
non-volatile
memory
.
MIDI
In
Frequ. +
MCV16
S0/
LFO
S90/
LFO
Frequ. –
Mode
MIDI /
SG
Reset/
Store
T0/
LFO
T315/
C16
