AudioFu Chart · November 2026
Best Envelope Modules Under $100 2026
The top pick is Doepfer A-140 ADSR Envelope Generator ($73). Behringer Dual Envelope Generator 1003 gives you the most for the money at $36. Ranked by the AudioFu Index from 10 models across 3 brands, prices checked every night.
Last updated: November 4, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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You get an ADSR envelope generator in Eurorack format. Each time a gate signal comes in, it makes an adjustable control signal, and you shape it with attack, decay, sustain and release. It suits you if you want to move a VCO, VCF or VCA over time, since the envelope comes out in normal and inverted form.
Pros
- Generates a control envelope that can modulate VCO, VCF and VCA modules
- Outputs the envelope in both normal and inverted S-form
- Four parameters, attack, decay, sustain and release, can be set independently
Cons
- Free-running ADSR-LFO mode requires the separate A-167 comparator module
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Behringer 140 Dual Envelope / LFO Eurorack Synthesizer Module
140 Dual Envelope/LFO · Behringer
4 for sale on Reverb1 finish at Thomann
The Behringer 140 is a surprisingly capable dual envelope and LFO module, perfect for experimental sound design and adding movement to basic synth patches. It's a great entry point for those new to modular synthesis or anyone needing extra modulation on a budget—just be prepared to dial in the envelopes a bit to get the response you want.
Pros
- Dual envelopes offer flexibility for complex modulation sequences
- LFO’s delay control adds unique rhythmic possibilities
- Compact 16HP footprint saves valuable rack space
Cons
- Plastic knobs feel less premium than higher-end modules
- Limited waveform selection on the LFO compared to rivals
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The Abacus is a seriously clever little module for the price. It's a great starting point for modular beginners exploring envelope shaping and LFO possibilities, or a useful utility for seasoned synth explorers who need extra routing flexibility on a budget. It's not going to replace a top-tier envelope module, but it's surprisingly versatile.
Pros
- Highly flexible function generation for diverse synthesis tasks.
- 4-channel mixer expands routing options considerably.
- Compact 20HP footprint maximizes Eurorack space efficiency.
Cons
- Plastic construction feels less robust than higher-end modules.
- Limited curve shaping compared to dedicated envelope generators.
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This small envelope generator is perfect for tight racks. You get Attack and Decay controls plus a handy LFO loop switch. It works well as a simple timing source or envelope shaper.
Pros
- Compact 1U form factor fits tight racks easily
- Dual Attack and Decay controls shape envelopes precisely
- Loop toggle switch lets you run LFO modes simply
Cons
- Only two stages limits complex envelope shaping
- Low power draw means weak signal driving
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The A-142-1 is a workhorse envelope generator – it's incredibly reliable and straightforward. It's perfect for beginners getting into modular synthesis or anyone needing a solid, predictable envelope without a lot of fuss. It’s a fantastic building block for more complex patches, but don't expect fancy curves out of this one.
Pros
- Simple, reliable decay control for predictable envelopes
- Doepfer’s robust construction ensures long-term stability
- Compact 8HP footprint maximizes patch flexibility
Cons
- Single decay parameter limits envelope shaping possibilities
- Limited attack control requires external modulation for complex shapes
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This compact module packs two envelopes and an LFO into a tiny 1U slot. It's great for adding precise timing and movement to your signals without taking up much rack space. Ideal for anyone needing reliable, adjustable decay without extra modules.
Pros
- Dual independent envelopes allow complex dynamic modulation
- Each channel has its own manual decay time control
- Internal trim pots let you fine-tune attack time easily
Cons
- Very small depth of only 45 millimeters
- Lacks dedicated filter or voltage control sections
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Behringer 1033 Dual Envelope Generator Eurorack Module
Dual Envelope Generator 1033 · Behringer
2 for sale on Reverb1 finish at Thomann
The Behringer 1033 is a surprisingly capable dual envelope generator for the price. It's a great starting point for those new to modular synthesis, or a useful utility for experienced users needing extra envelope shaping. It's perfect for adding dynamic movement to drones, sequences, or anything that needs a little rhythmic pulse.
Pros
- Dual channels offer versatile modulation possibilities.
- Controls provide detailed shaping of envelope curves.
- Compact 16HP footprint saves valuable rack space.
Cons
- Plastic knobs feel a little cheap and less precise.
- Limited range of decay times compared to higher-end modules.
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The Behringer 1003 is a fantastic entry point to envelope generation in modular synthesis. It’s incredibly affordable and gives you a surprising amount of control, making it ideal for beginners exploring modulation or anyone needing a couple of basic envelopes without breaking the bank. The dual nature is a real bonus for layering and creating evolving textures.
Pros
- Dual envelopes offer significant patching flexibility for complex sequences
- Attack and decay controls provide nuanced shaping possibilities
- Manual gate button simplifies testing and experimentation
Cons
- Plastic knobs feel a little cheap and lack precise tactile feedback
- Limited sustain level range restricts some envelope possibilities
47AudioFu
Index↓ 3.0%since Aug 17 · lowest so far$37 · Aug 17$36 now$36€32 at Thomann · in stockCheck price ↗ -
Behringer 911 Envelope Generator Eurorack Synthesizer Module
911 Envelope Generator · Behringer
1 for sale on Reverb1 finish at Thomann
The Behringer 911 is a surprisingly capable envelope generator for the price. It's a great entry point for modular synthesis or a solid utility module for seasoned users needing a reliable, fast ADSR. Perfect for anyone experimenting with sound design or wanting to add dynamic shaping to their patches.
Pros
- Excellent value for the feature set offered.
- Adjustable sustain provides nuanced envelope shaping.
- Fast attack times (down to 2ms) for percussive sounds.
Cons
- Limited CV output options compared to higher-end modules.
- Plastic knobs feel a little cheap, but function well.
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The FEG is a surprisingly capable envelope module for the price. Its fast/slow time range selection and loop/one-shot functionality make it incredibly versatile, especially for experimental sound design and rhythmic sequences. This is a great starting point for those new to modular or a handy utility for seasoned patchers needing a compact, reliable ADSR.
Pros
- Excellent time range flexibility for diverse envelope shaping.
- Compact 4TE width maximizes space in tight Eurorack setups.
- Loop and one-shot modes offer creative rhythmic possibilities.
Cons
- Limited voltage output (8.5V) might need amplification in some applications.
- 30mA current draw could be a concern in power-constrained systems.
Envelope Modules by the numbers
Measured across all 10 models we track, not a sample.
Median $73 — half of all envelope modules here cost less.
How to choose the best envelope modules
Attack Time Range
The wider the range, the more flexibility you have. A fast attack is crucial for percussive sounds, while a slow attack can create swelling pads. Limited range on budget modules often means compromises.
Sustain Level
This dictates how long the note holds after the attack phase. A shallow sustain can sound thin, while a full sustain can get muddy quickly. Look for something with a decent amount of headroom here.
Release Time
Just as important as the attack, the release controls how the sound decays after you release the key. A short release can be punchy, a long release can create a trailing effect. Too short and things sound abrupt.
Curve Control
Some modules have a curve or shape control that lets you modulate the ADSR's shape. This adds character and expressiveness, but it's rare under $100. If you find it, consider it a bonus.
Stability & Noise
Cheap components can introduce noise or instability. Listen carefully for unwanted hum or clicks, especially at extreme settings. A little hiss is expected, but anything beyond that is a red flag.
Buying guide
Alright, so you're diving into modular and need an envelope module but don't want to drop a fortune. That's smart. A decent ADSR is the backbone of a ton of sounds, from pulsing basses to evolving pads, and you don't need to spend a week's rent to get something that works. Let's look at some solid options that won't break the bank.
At this price point, you're trading off features and sometimes build quality. Don't expect Eurorack-grade precision or a ton of modulation options. What you will find are functional modules that get the job done.
Prioritize a wide attack/release range over fancy curve controls, and always listen for noise - that's the biggest telltale sign of cheap components. It's better to have a basic, clean envelope than a feature-rich one that sounds like a broken radio.
How the AudioFu Index works
Five measured signals and nothing else — no stars from strangers, no “tested by experts” we didn’t do. The weights are fixed and public. We don’t play these instruments; we measure the market around them.
This chart covers 10 envelope modules from the Thomann catalogue. Before you buy, read hands-on reviews and, where you can, play it. Full methodology.
AudioFu earns a commission when you buy through our Thomann links. It never changes the order — the index does.
- Demand40%
How many of this exact model are for sale on Reverb right now — what musicians actually buy and resell.
- Lineup20%
How many finishes Thomann stocks — makers expand the models that sell.
- Price15%
Where the price has moved since we started tracking in August.
- Specs15%
How completely the maker documents it.
- Maker10%
How deep the brand’s range is in this category.
Questions
What's the difference between an ADSR and an AHDSR?
ADSR (Attack, Decay, Sustain, Release) is the standard. AHDSR (Attack, Hold, Decay, Sustain, Release) adds a 'Hold' time - a brief period where the sound doesn't change after the attack. It's subtle, but useful for certain percussive effects.
Can I use this envelope to control the filter cutoff?
Absolutely! That's a huge part of what makes modular so versatile. Just patch the envelope's output to your filter's cutoff frequency input. Experiment with different amounts of modulation for evolving textures.
I'm hearing a lot of noise. Is that normal?
Some noise is inevitable, but excessive hiss, clicks, or hum is a sign of poor components. Try different power supplies and patch cables to rule out external interference, but if it persists, the module itself might be faulty.
Are these modules true bipolar?
Probably not. Most budget envelopes are unipolar - they only output positive voltages. This means they can only increase a parameter, not decrease it. It's a limitation, but not always a dealbreaker.
What's the best way to use this envelope for basslines?
Short attack, medium decay, a full sustain, and a relatively short release generally works well for bass. Experiment with the attack time to create different 'thump' characteristics - a faster attack gives a sharper bass, a slower attack a rounder one.
