Doepfer A-143-2 Quad ADSR User Manual download pdf

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DOEPFER System A-100 Quad ADSR A-143-2

Fig. 1: A-143-2 Controls, Inputs and Outputs

1. Introduction

Module A-143-2 contains four independent ADSR-type

envelope generators. Each sub-unit has available the

controls Attack, Decay, Sustain and Release. The three-

position Range switch allows selection of the desired time

range (low - high - medium). The adjustable envelope time

ranges from several minutes to less than 100 microseconds.

On top of this each unit is equipped with three digital outputs

(high/low): "End of Attack (EOA)", "End of Decay (EOD)"

and "End of Release (EOR)". As soon as the criterion is

valid (e.g. end of decay state) the corresponding digital

outputs turns "high". These outputs can be used e.g. to

daisy-chain several ADSR units. For this the digital output in

question (EOA, EOD or EOR) has to be connected to the

Gate input of the following ADSR. Even automatically

running envelopes (pseudo LFOs) or so-called "quadrature

envelopes" with cyclical modulations of several ring-shaped,

daisy-chained ADSRs are possible.

In addition to the obligatory Gate (G) input for envelope

generators each unit has available a Retrigger (Rt) input.

The retrigger turns the direction to "upward" if the envelope

has already reached the decay state while the retrigger

pulse occurs. The Gate inputs 2, 3 and 4 are normalled to

Gate input 1, i.e. the Gate input 1 is connected to the

switching contacts of the other inputs. Thus only one Gate

signal at Gate input 1 can be used to trigger all four units

simultaneously.

The envelope outputs are displayed with LEDs.

1 2 3 4 5 6

Summary of Contents

Page 1 - 1. Introduction

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad ADSR A-143-21Fig. 1: A-143-2 Controls, Inputs and Outputs1. IntroductionModule A-143-2 contains four i

Page 2 - 2. Basic Principles

Quad ADSR A-143-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER22. Basic PrinciplesFig. 2 shows the basic function of each unit:Fig. 2: Basic functionThe

Page 3 - Fig. 5: A-143-2 front panel

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad ADSR A-143-233. OverviewFig. 5: A-143-2 front panel1!2345&6$%"§

Page 4

Quad ADSR A-143-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER4Controls:1Range : range switch low – high – medium2 Attack : attack control3 Decay : decay

Page 5

DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad ADSR A-143-253. Controls, Inputs and Outputs! G : gate input$ Rt : retrigger inputSocket ! is the ADSR’

Page 6 - 4. User Examples

Quad ADSR A-143-2 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER64. User ExamplesThe A-143-2 is suitable for all kinds of modulations whereenvelope generat

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Doepfer A-143-2 Quad ADSR User Manual

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Summary of Contents

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