Instruction Manual

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System A - 100

VCADSR A-141

1. Introduction

Module A-141 (VCADSR) is a voltage controlled

envelope generator.

Whenever a

gate signal

is sensed at the VCADSR’s

gate input, an adjustable sequence of voltages is

triggered - the envelope. You can then use these

envelopes to modulate a VCO, VCF and/or VCA, and

alter the input and output voltages of all sorts of

modules.

The shape of the envelope is governed by four para-

meters: Attack, Decay, Sustain and Release (see Fig.

1 on page 3). On the A-141, these parameters can be

controlled by hand, or by voltage control, via the

dedicated CV inputs (each with an attenuator).

The A-141 VCADSR also has a retrigger facility:

while the gate is open, a trigger pulse received at the

retrigger socket will

re-start the envelope

from the

beginning of its attack phase (see Fig. 2 on page 5).

Gate

Decay

Release

Attack

A-141

VCADSR

Sustain

Retrig.

Output

CV A

CV D

CV S

CV R

Summary of content (8 pages)

PAGE 1
System A - 100 doepfer VCADSR A-141 1. Introduction A-141 Gate VCADSR Retrig. CV A CV A Attack CV D Decay CV S Sustain CV R Release CV D CV S CV R Output Module A-141 (VCADSR) is a voltage controlled envelope generator. Whenever a gate signal is sensed at the VCADSR’s gate input, an adjustable sequence of voltages is triggered - the envelope. You can then use these envelopes to modulate a VCO, VCF and/or VCA, and alter the input and output voltages of all sorts of modules.
PAGE 2
A-141 VCADSR System A - 100 Controls and indicators: 2. VCADSR - Overview A-141 VCADSR Voltage Controll. Envelope Generator CV A ➊ A 10 0 ➀ 10 0 CV D ➋ D 10 0 CV S ➌ S 10 0 R 10 0 Gate 2 Retrig. Out ➏ ➐ 3 S: Sustain level control 4 R: Release time control 9 LED : Envelope state indicator ➅ In- / Outputs: ➇ ➈ ➎ Decay time control Attenuators for CV inputs ! to $ ➃ 10 0 2 D: 5 ...
PAGE 3
System A - 100 doepfer 1 A 3. Controls and indicators As soon as a gate signal is sensed at the VCADSR gate input 5, the VCADSR puts out a varying voltage, changing in time, known as an envelope. See Fig. 1. Attack Time ca. +8 V Release Time Decay Time This controls the Attack time of the envelope.
PAGE 4
A-141 VCADSR 5 CV A ... System A - 100 8 CV R doepfer Output Attenuators 5 to 8 set the level of voltage control for inputs ! to $. Gate 9 LED The LED indicates the level of the envelope’s voltage. Retrig. Fig. 2: Envelope re-triggering 4. In- / Outputs ! CV A ... $ CV R CV inputs ! to $ are where the voltages you want to use to control the envelope parameters are patched. % Gate Socket % is the VCADSR’s gate input. & Retrig. Socket & is the VCADSR's retrigger input.
PAGE 5
doepfer System A - 100 5.
PAGE 6
A-141 VCADSR System A - 100 doepfer output from an A-118 module, or cyclically, by using an LFO such as the A-145, A-146 or A-147. CV VCO VCA Gate A-141 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. VC R A-175 CV Fig.
PAGE 7
doepfer System A - 100 VCADSR A-141 7
PAGE 8
A-141 VCADSR System A - 100 doepfer 6. Patch-Sheet The following diagrams of the module can help you recall your own Patches. They’re designed so that a complete 19” rack of modules will fit onto an A4 sheet of paper. Photocopy this page, and cut out the pictures of this and your other modules. You can then stick them onto another piece of paper, and create a diagram of your own system. Make multiple copies of your composite diagram, and use them for remembering good patches and set-ups.