Doepfer A-140 ADSR (Envelope Generator) User Manual download pdf

doepfer

System A - 100

ADSR A-140

1. Introduction

Module A-140 (ADSR) is an envelope generator,

and, since it puts out control voltages, counts as one

of the modulation devices in a modular system.

As soon as the gate input receives sufficient voltage,

the ADSR generates a variable voltage, changing in

time, called an envelope. This varying voltage is

output in normal (positive) and inverted form, and can

be used, eg., for voltage controlled modulation of a

VCO, VCF, or VCA, or for processing other modules’

inputs and outputs.

The shape of the envelope is governed by four para-

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

1 on page 3).

The envelope is started (triggered) by a gate signal

either from the INT.GATE voltage on the system bus,

or, if a signal is put into it, from the gate input socket.

The envelope can also be re-triggered, ie. start from

scratch again, each time a trigger signal is sensed at

the Retrig. input socket, when the gate is still open

(see Fig. 2 on page 5).

Gate

Decay

Inverse

Output

Release

Attack

A-140

ADSR

Sustain

Retrigger

Output

ADSR

Control

Time

Range

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - 1. Introduction

doepferSystem A - 100ADSR A-14011. IntroductionModule A-140 (ADSR) is an envelope generator,and, since it puts out control voltages, counts as one

Page 2 - A-140

A-140 ADSRSystem A - 100doepfer22. ADSR overviewControls:1 A: Attack time control2 D: Decay time control3 S: Sustain level control4 R: Release

Page 3 - 3. Controls

doepferSystem A - 100ADSR A-14033. ControlsThe ADSR puts out a varying voltage, called an enve-lope, whenever a gate signal is sensed (see Fig. 1).

Page 4 - 4. In / Outputs

A-140 ADSRSystem A - 100doepfer45 ADSR ControlLED 5 gives a visual indication of the envelope voltageat the output.6 Time RangeThis 3-position rotar

Page 5

doepferSystem A - 100ADSR A-1405" Retrig.Socket " is the ADSR’s retrigger input, which can beconnected, for instance, to the output from a

Page 6 - 5. User examples

A-140 ADSRSystem A - 100doepfer65. User examplesThe envelope generated by the ADSR can be used formost kinds of modulation:• ADSR - VCAModulation

Page 7 - 6. Patch-Sheet

doepferSystem A - 100ADSR A-14076. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re designed sothat a c

Page 8

A-140 ADSRSystem A - 100doepfer8

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Doepfer A-140 ADSR (Envelope Generator) User Manual

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Summary of Contents

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