Doepfer A-100(~ 40 MB) - Manual (Page 402)

A-141 VCADSR System A - 100 doepfer
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Fig. 3: Controlling release time
The same basic system can be used, eg, to shorten
the attack phase the higher the velocity sensed;
playing hard produces a short attack, and playing
more gently a slower attack to the note. Simply patch
the relevant velocity output of a MIDI-CV interface,
(for instance output CV2 on an A-190) to the A-175
Voltage Inverter's input, and the A-175’s output to the
CV input ! (CV A) of the VCADSR.
Random/cyclical parameter changes
You can get some interesting results by modulating
ADSR parameters either at random, with the random
output from an A-118 module, or cyclically, by using
an LFO such as the A-145, A-146 or A-147.
This is where creativity and love of experimentation
get to be really important - but one suggestion at least
is that the Decay parameter is a good one to start with.
In the patch in Fig. 4, each new note has a different
(random) decay.
Fig. 4: Random decay with each new note
VCO VCA
A-141
CV
A-175
Gate
VC R
VCO VCA
A-118
CV
Gate
A-148
A-141
CV D
Trig In
Random
Out