Doepfer A-140

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Doepfer A-140

Doepfer

A-140

4.8 Expert Rating

Product Info

Article Number: 167058
Brand: Doepfer
Model: A-140
Price: $71.50

* Prices may vary. Check retailer for current pricing and availability.

The A-140 is a foundational Doepfer module, and for good reason. It's a workhorse ADSR, simple to use, and delivers that classic Eurorack character. Perfect for beginners getting into modular synthesis or seasoned veterans needing a reliable, compact envelope generator.

Product Description

Doepfer A-140, ADSR Envelope Generator

  • The module A-140 is a envelope generator and since it delivers control voltages
  • belongs to the modulation-modules. As soon as the ADSR is triggered at gate-input
  • it generates an adjustable control signal called the envelope. This envelope is present on its outputs in normal and inverted S-form and can be used e.g. for modulation of VCO
  • VCF and VCA modules as well as for transient and decay oscillations of other modules. The S-form of the envelope is unambiguously defined by four parameters
  • attack
  • decay
  • sustain and release. The ADSR is triggered with a gate-signal at gate-input and provides the possibility of a retrigger-Function
  • i.e. the envelope will be restarted every time a trigger signal is present at the retrigger-socket while the gate is active.

In connection with the comparator-module A-167 a free run "ADSR-LFO" can be realised.

  • Envelope Generator
  • Parameters can be set independently
  • 3-Step switch for selecting the time range
  • Eurorack format
  • Width: 8 HP
  • Depth: 50 mm
  • Power requirements: +20 mA (+ 12V) / -20 mA (-12V)
PROS
  • • Classic Doepfer build quality: robust, reliable, and durable.
  • • Versatile ADSR shaping for a wide range of modulation tasks.
  • • Retrigger functionality allows for complex, evolving sounds.
  • • Compact 4HP footprint maximizes space in modular systems.
CONS
  • • Limited parameter control compared to modern envelope modules.
  • • Older design lacks the finesse of later Doepfer revisions.
  • • The sustain level can be a bit tricky to dial in precisely.

Product Video

Key Features

Type ADSR Envelope Generator
Stages Four (Attack, Decay, Sustain, Release)
HP Width 4
Depth 1.5 in
Power Draw +12V: 5mA, -12V: 1mA
CV Outputs Two (Normal, Inverted)

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Frequently Asked Questions

Each new trigger resets the envelope’s attack and decay stages, allowing for repeating patterns or evolving textures without a full release.
The sustain is adjustable, but the range can be somewhat limited, requiring careful tweaking to avoid overly aggressive or weak envelopes.
While the A-140 provides the core ADSR functionality, newer modules often offer more nuanced shaping options and finer parameter control.

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