doepfer-a-140-2

Doepfer A-140-2 Dual ADSR

Dual four-stage envelope generator with voltage control

8 HP Eurorack module

The A-140-2 is a dual ADSR envelope generator providing two independent four-stage envelopes for shaping amplitude, filter cutoff, or any voltage-controlled parameter. Each envelope features classic Attack, Decay, Sustain, and Release stages with voltage control over timing parameters, making it essential for traditional subtractive synthesis and dynamic modulation.

Features

  • Dual independent ADSR envelopes
  • Voltage control over time parameters (CVT)
  • Configurable polarity for second output
  • Bus gate signal connectivity
  • Individual parameter voltage control selection
  • Optional sustain voltage control

Controls & Jacks (18)

  • Attack 1— Attack time for envelope 1. Controls how quickly the envelope rises to peak after gate on.
  • Decay 1— Decay time for envelope 1. Controls how quickly the envelope falls from peak to sustain level.
  • Sustain 1— Sustain level for envelope 1. Sets the held level while gate is high.
  • Release 1— Release time for envelope 1. Controls how quickly the envelope falls to zero after gate off.
  • Attack 2— Attack time for envelope 2.
  • Decay 2— Decay time for envelope 2.
  • Sustain 2— Sustain level for envelope 2.
  • Release 2— Release time for envelope 2.
  • CVT 1— CV time input for envelope 1. Modulates all time parameters simultaneously.
  • Gate 1— Gate input for envelope 1. Rising edge starts attack, falling edge starts release.
  • CVT 2— CV time input for envelope 2.
  • Gate 2— Gate input for envelope 2.
  • Retrig 1— Retrigger input for envelope 1. Restarts attack phase without requiring gate off/on.
  • Retrig 2— Retrigger input for envelope 2.
  • Out2 Ch1— Second envelope output for channel 1.
  • Out1 Ch1— Primary envelope output for channel 1.
  • Out2 Ch2— Second envelope output for channel 2.
  • Out1 Ch2— Primary envelope output for channel 2.

How-To Guides

  • Classic VCA Envelope
  • Filter Sweep Modulation
  • Expression-Controlled Timing
  • Dual Envelope Layering
  • Percussive Pluck Shaping
  • Sustained Pad Envelope
  • Reverse Envelope Effect
  • Rhythmic Filter Pumping

Explore the interactive A-140-2 Dual ADSR panel on BleepDex — tap any control to learn what it does.

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