A-191
MCV 16
System A - 100
doepfer
4
Table 1
: Valid MIDI controllers, their corresponding CV
outputs, and default values.
The A-191’s internal MIDI-synchronised LFO has three
waveforms - sawtooth, triangle, and rectangle.
This LFO is only
active
when a
MIDI clock
is being
sent to the MIDI IN, from a START or CONTINUE
message until a STOP message. LED
8
indicates
that it’s active.
At a STOP message, the voltage at the CV output is
held; at a CONTINUE message, the LFO starts from
this value; and at a START message, the waveform
begins again, starting from 0 V.
The LFO rate can be slowed down by dividing the
clock rate. You set the
divisor
either with
MIDI
controller #92
(Tremolo Depth) or manually, with
buttons
2
and/or
3
.
The
note length N
of a full cycle of the waveform
generated by the LFO follows this formula :
Nth Note = 1/16 x controller value (see Table 2)
So, for instance, in 4/4 time, with a controller value of
8, the note length of a full LFO cycle would be half of a
whole note: that is, the LFO would cycle twice for each
beat in the bar (see Fig. 1).
Output
corresponding MIDI controller
default [V]
AT
After Touch
0
Pit
Pitch Wheel
2.5
C1
CTRL. #01 - Modulation Wheel
0
C2
CTRL. #02 - Breath Controller
0
C4
CTRL. #04 - Foot Controller
0
C5
CTRL. #05 - Portamento
0
C6
CTRL. #06 - Data Slider
0
C7
CTRL. #07 - Volume
5
C8
CTRL. #08 - Balance
2.5
C10
CTRL. #10 - Pan
2.5
C11
CTRL. #11 - Expression
0
C12
CTRL. #12
0
C16
CTRL. #16
0
