audiobriefs
7:50in productionCh. 1 · Part of the A-100/ 7:50 · ceiling 15 min
Synths & drum machines

Doepfer A-140 ADSR

It’s not clever. It’s not flexible. But in an A-100 rack, it just works.

The Doepfer A-140 ADSR is a basic ADSR envelope generator for the A-100 modular system. It has no published specs. It has no CV inputs. It has no visual indicators. It does one job, simply.

Chapters & takeaways4
  1. 1:01
    Part of the A-100

    It belongs to the Doepfer A-100 modular synthesizer series.

  2. 2:46
    An 'Other Module'

    It’s classified as an 'other module', not a core oscillator or filter.

  3. 3:34
    No Specs, No Surprises

    No technical specifications are published — no slopes, voltages, timing ranges or tolerances.

  4. 4:44
    Four Knobs, Two Jacks

    It’s a functional ADSR, but not a feature-rich one — four knobs, two jacks, no extras.

Worth your time?

Yes. Use the whole thing.

3/ 5
What works
  • as a functional ADSR in fixed-timing applications
  • within the A-100’s utility-first ecosystem
What does not
  • offer CV control over stages
  • include LED indicators
  • support retriggering or looping
  • provide delay or hold functions
Use it if
  • A-100 owners needing a spare ADSR
  • players prioritising reliability over features
Skip it if
  • modular users needing expressive envelope control
  • those without an A-100 system
The written brief1 min read

What it is and what it was built for

The Doepfer A-140 ADSR is a module in the Doepfer A-100 modular synthesizer series. It was built to generate standard ADSR envelopes for shaping sound in modular synthesis.

How it works, in terms a player would use

It is an ADSR envelope generator module. It shapes amplitude, filter or modulation signals over time using Attack, Decay, Sustain and Release stages. A player triggers it with a gate signal and routes its output to a VCA, filter or other CV destination.

What it does better than anything else

It does better than nothing: it delivers a clean, functional ADSR response in the A-100 format, fitting the Doepfer ethos of utility-first design.

What it does badly

It does badly where flexibility is needed: no retriggering, no delay, no hold, no slew, no bipolar output, no LED indicators, no CV control over individual stages.

What people made with it

No specific works, artists or recordings are cited in the source material.

Who should use it, and who should not

A player who already owns an A-100 system and needs a spare, simple ADSR should use it. Anyone needing CV control, visual feedback or extended timing options should not.

Is it worth your time

It is worth your time only if you need a basic, no-frills ADSR in an A-100 system. It offers no modulation inputs, no reset or loop functions, and no visual feedback — just four knobs and two jacks.

Same bench · Synths & drum machines4 of 241
9:57
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9:16
Doepfer A-100DoepferThe Doepfer A-100 is an analog modular synthesizer system introduced in 1995. It uses 3U-height, 2HP-width modules patched with 3.5 mm leads. It established the Eurorack standard adopted by many manufacturers. It enables emulation of the Trautonium and Theremin using specific modules.
7:57
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10:34
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