Behringer DUAL ENVELOPE GENERATOR MODULE 1033 Eurorack Analog Module — main product image

Behringer DUAL ENVELOPE GENERATOR MODULE 1033 Eurorack Analog Module

Behringer

Behringer DUAL ENVELOPE GENERATOR MODULE 1033 Eurorack Analog Module

Name: Behringer DUAL ENVELOPE GENERATOR MODULE 1033 Eurorack Analog Module
Brand: Behringer
SKU: DUAL ENVELOPE GENERATOR MODULE 1033

★★★★★4.1 (20 reviews)

Bring 1970s analog envelope architecture into your Eurorack — the 1033 module delivers dual DADSR control with gate delay down to 3ms.

$52.90*

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*Price sourced from Amazon.com. Last updated:Jun 28, 2026.Price and availability are subject to change.

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Overview

The Behringer 1033 is a direct analog recreation of the ARP 2500 Series dual DADSR envelope generator — a module architecture from the early 1970s that distinguished itself from the dominant ADSR topology by inserting a programmable Gate Delay stage at the front of the envelope chain. That single addition changes the expressive range of the module significantly: where an ADSR fires immediately on gate receipt, the 1033's Gate Delay (adjustable from 3 milliseconds to 3 full seconds) means the envelope can be programmed to hold before beginning its attack. Two independent generators means two fully discrete DADSR shapes — each with its own Gate Delay, Attack, Initial Decay, Sustain, and Final Decay — responding to different or shared gate sources within the same patch.

In a Eurorack context, the 1033 is a specialist tool rather than a general-purpose envelope utility. The analog circuitry produces the smooth, continuous voltage curves that define the sonic character of '70s synthesizer design — not the quantized steps of a digital envelope emulator. It is built for patches where timing, rhythmic offset, and the precise shaping of transient attack and release decay tails matter: evolving pads where delayed swells create movement without LFO intervention, percussive sequences where the Initial and Final Decay curves need to diverge, or dual-voice patches where the gate delay creates a natural stereo stagger between two voices. For the builder who wants historically authentic control voltage architecture in a modern Eurorack format, the 1033 delivers the functional and sonic original without requiring a vintage rack and the maintenance costs that come with it.

Key Features

Classic 1033 analog dual DADSR module from the '70s

Authentic reproduction of the circuitry from the "2500" Series

The module contains two identical envelope generators for creating control signals

Each generator features 5 adjustable parameters: Gate Delay, Attack Time, Initial Decay Time, Sustain Level, Final Decay Time

Gate enables the beginning of the envelope to be delayed between 3 ms and 3 seconds

Specifications

Module Type

Analog Dual DADSR

Series

2500 Series

Number of Envelope Generators

Adjustable Parameters per Generator

Gate Delay, Attack Time, Initial Decay Time, Sustain Level, Final Decay Time

Gate Delay Range

3 ms to 3 seconds

Pros & Cons

👍 Pros

Gate Delay parameter (3ms–3 seconds) enables rhythmic envelope offsets and stuttered triggering that standard ADSR modules cannot produce without additional utility modules
Two fully independent envelope generators in a single module reduces rack space requirements for dual-modulation patches
DADSR topology with separate Initial Decay and Final Decay parameters gives fine control over both the attack transient tail and the release curve independently
Analog circuitry produces the characteristic organic response curve associated with the original ARP 2500 — not a digitally stepped approximation
Faithful recreation of a historically significant module gives access to a '70s-era control voltage architecture that was previously expensive or unavailable in Eurorack format

👎 Cons

Current draw specifications are not prominently published — a power-constrained case requires verification before installation
The DADSR parameter set has a learning curve for patchers accustomed to simple ADSR modules; the gate delay stage in particular requires deliberate programming to avoid unintended timing offsets
No built-in CV inputs for modulating envelope parameters (such as attack or decay time) — external modulation requires additional patching infrastructure
As a single-function utility module, it occupies rack HP that more versatile multi-function modules could use in a compact system
Analog component tolerances may mean the two generators do not track identically at extreme parameter settings — relevant for patches requiring precisely matched dual envelopes

Frequently Asked Questions

What makes a DADSR envelope different from a standard ADSR, and how does the gate delay parameter change what you hear?

A DADSR adds an initial Gate Delay stage before the Attack — the envelope does not begin until the delay time elapses, which ranges from 3ms to 3 seconds on this module. In practice, this means you can program a stutter, a swell-in delay after a gate trigger, or a rhythmic offset between two envelopes on the same patch. A standard ADSR would respond immediately to the gate; this one holds back, which opens up rhythmic and textural possibilities that require creative patching to approximate otherwise.

Can both envelope generators be used independently, or do they share a trigger input?

Both generators are independent and identical — each has its own gate delay, attack, initial decay, sustain, and final decay controls. They can respond to different gate sources simultaneously, or both can be driven from the same trigger for layered control voltage shapes with different timing offsets via the gate delay parameter.

What Eurorack power format does this module use, and what is its current draw?

The module is designed for standard Eurorack power (±12V and +5V buses). Specific current draw figures are not listed in the available specification data — verify with Behringer's published spec sheet before placing it in a power-constrained case.

How faithful is the recreation to the original ARP 2500 Series 1033 circuitry?

Behringer describes it as an authentic reproduction of the "2500 Series" circuitry. The DADSR topology and parameter ranges (including the 3ms–3 second gate delay) match the original module's architecture. Sonic fidelity to vintage ARP hardware will depend on component tolerances, but the functional behavior and control range are drawn directly from the '70s original.

What is the primary difference between "Initial Decay" and "Final Decay" in this envelope?

Initial Decay sets the fall time from the Attack peak down to the Sustain level — the standard "D" in ADSR. Final Decay is the release stage that follows when the gate closes, determining how long the envelope takes to fall from the Sustain level to zero. Having separate controls for both decay phases gives you independent shaping of the attack transient tail and the release tail, useful for designing percussive sounds where those two decay curves need to behave differently.