modular systems » Eurorack modules » modulation » Envelopes & function generators

The 2HP ADSR module is a four stage linear envelope generator with two time ranges. Each stage can be controlled independently allowing for the creation of complex, multi-segment envelopes. It is great for modulating filters, VCAs, and oscillators.

The 2HP ADSR module is a four stage linear envelope with two time ranges. Each stage can be controlled independently allowing for the creation of complex, multi-segment envelopes. It is great for modulating filters, VCAs, and oscillators.

The Pingable Envelope Generator or PEG is a dual digital envelope generator. The duration of one envelope cycle can be forced-to-fit between two "pings". This means that the envelope will perfectly fit into a rhythmical scheme!

ACL’s Envelope X3 comes equipped with three ADSR envelopes. The module is based on circuits well-known from the Japanese 100m synthesizer. Compared to the original designs, the X3 envelopes were improved in various ways. The circuits are more stable, more flexible and, with the right settings, a lot faster.

Version in vintage black design

Two independent envelopes in one Eurorack module, which are accurate clones of the Minimoog's envelope generators. Each unit can be used as an AD or ADSD envelope.

Two independent envelopes in one Eurorack module, which are accurate clones of the Minimoog's envelope generators. Each unit can be used as an AD or ADSD envelope.

Super-compact yet powerful and snappy envelope generator featuring voltage control of time paramters, loop function, and alternative curve characteristics. More or less half of a function generator for low buck.

The Quaid Megaslope is a highly flexible five stage function generator. It can operate in three different modes: as a multistage complex envelope, inspired by the Juno and Casio CZ series, as an LFO (loop mode) or as a step sequencer (step mode) with per step programmable slides. There are two outputs, unipolar and bipolar, for perfect integration into your patch! Furthermore each stage features manual and voltage control of level and time.

The Trapezoid Generator module is made under license of the EMS and is a remake of the EMS envelope shaper known from VCS3, Synthi A and AKS. It is a very unique modulator which can be used as a trapeze or triangle shape LFO and/or a attack-hold-decay envelope generator. It's flexible, weird and totally different from an ADSR.
For the real EMS feeling combine the 500e Filter with the 510 Trapezoid.
Thanks to a new dual-bus concept, this circuit is fully compatible to Doepfer’s Eurorack standard.

The Trapezoid Generator module is made under license of the EMS and is a remake of the EMS envelope shaper known from VCS3, Synthi A and AKS. It is a very unique modulator which can be used as a trapeze or triangle shape LFO and/or a attack-hold-decay envelope generator. It's a flexible, weird unit from synthesizer history and totally different from an ADSR. For the real EMS feeling combine the 500N Filter with this module.

Thanks to a new front panel and bus concept, this version of the RS-510 is fully compatible to Doepfer-style Eurorack systems.

Flexible ADSR envelope with voltage control of decay and release times. Interesting hold and repeat functions turn the envelope into a LFO with gating functions. Among the ADSRs the RS-60 module is the most versatile and really recommendable!
Thanks to a new dual-bus concept, this circuit is fully compatible to Doepfer’s Eurorack standard.

Flexible ADSR envelope with voltage control of decay and release times. Interesting hold and repeat functions turn the envelope into a LFO with gating functions. Among the ADSRs the RS-60N module still is among the most versatile, natural sounding and highly recommended!
Thanks to a new front panel and bus concept, this version of the RS-60 is fully compatible to Doepfer-style Eurorack systems.

Befaco's approach of a dual complex function generator á la Serge / Buchla / Maths externds the idea of an integrator for slew limiting, envelope generation and oscillations by an analog logic processor and a slope detector per function generator which generates complex gate signals by analyzing if the generated curve is rising or falling at the given time.

Small, crisp and flexible – The VC ADSR is a compact, well equipped envelope offering excellent performance. The module can be activated via its gate input or a button. A trigger / gate switch allows the user to choose between two modes of operation. Attack, decay, sustain and release parameters are manually adjustable via sliders. Additionally, they can be modulated using CV inputs. The curves of all time values are shapeable. Four gate outputs emit a signal every time the corresponding phase (A, D, S or R) is active.

The ADSR from Birdkids offers six useful modes of operation including different very senseful loop modes. If you learn and remember these while using (see details), it is quite a flexible compact powerful tool in just 4HP of your Eurorack case.

The Model 180 Dual Attack Generator is composed of two ASR envelopes with linear voltage curves. The length of the sustain phases, here called note duration, are determined by either gate signals or potentiometers. The envelopes thus can also be used with an AD characteristic. Small time values lead to very punchy results. – Perfect for creating drum and percussion sounds. While attack or note duration phases are active, the modulators can’t be retriggered. Thanks to this, it is possible to use the Model 180 as an unconventional clock divider.

Delta-V features two function generators with additional VCAs. The components are matched very well. Their sound is clean and free of clipping. Used as envelopes, the function generators are ideal for crisp, percussive sounds. In LFO mode, the circuits go up into the audible range. Features such as shapeable attack and decay curves, slew inputs and EOC outs complete the outstanding overall impression.

The ADSR-VC2 is a dual envelope generator with two identical, independent ADSR units which can be both triggered simultaneously by one single trigger due to a normalized jack. All parameters (attack, decay, sustain release and the output level) can be voltage controlled. Besides short A, D and R times a switchable characteristic of the attack for punchy and crisp envelopes, but also long envelope times are possible of course.

We currently do not accept pre-orders for Cwejman products. If you are interested in this module, please use the availability notification. The number of Cwejman circuits is limited. Therefore, we recommend you to order online IMMEDIATELY when a module becomes available. Enquiries via e-mail or telephone are usually not fast enough. (More detailed information can be found on the product page.)

CTG-VC, a single complex voltage controlled transient generator. All parameters such as attack time, attack hold time, decay time, sustain level, release time and output level are voltage controlled.

We currently do not accept pre-orders for Cwejman products. If you are interested in this module, please use the availability notification. The number of Cwejman circuits is limited. Therefore, we recommend you to order online IMMEDIATELY when a module becomes available. Enquiries via e-mail or telephone are usually not fast enough. (More detailed information can be found on the product page.)

The A-140 is a fast ADSR type envelope generator with both positive and inverted outputs as well as a retrigger input. The coarse time range of the A-140 can be selected from three settings by a rocker switch.

Vintage edition with a black faceplate and custom knobs.

The A-140 is a fast ADSR type envelope generator with both positive and inverted outputs as well as a retrigger input. The coarse time range of the A-140 can be selected from three settings by a rocker switch.

The A-140-2 contains two classic ADSR envelopes, which can be configured using jumpers. For example, it is possible to determine which parameters are influenced by external control voltages or whether inverted CV signals are emitted in addition to normal signals. – A very clever module!

The A-140-2 contains two classic ADSR envelopes, which can be configured using jumpers. For example, it is possible to determine which parameters are influenced by external control voltages or whether inverted CV signals are emitted in addition to normal signals. – A very clever module!

The A-141-2 module is an ADSR envelope generator with voltage controlled attack, decay, sustain and release parameters. Other features include LFO functionality as well as digital end-of-attack and end-of-release outputs. Besides positive and inverted outputs there is an output with voltage controlled amplitude available.

The A-141-2 module is an ADSR envelope generator with voltage controlled attack, decay, sustain and release parameters. Other features include LFO functionality as well as digital end-of-attack and end-of-release outputs. Besides positive and inverted outputs there is an output with voltage controlled amplitude available.

Doepfer’s A-141-4 consists of four ADSR envelopes. The modulators can be triggered individually and offer separate CV outputs. However, there is only one shared set of potentiometers for editing all envelopes. – A great design for polyphonic patches. On top of this, all envelope phases can be influenced by control voltages.

Voltage controlled envelope generator with one parameter: decay. Due to additional outputs for positive and negative gate with adjustable threshold the module can be also used as a voltage controlled trigger delay.

The A-142-2 consists of two VCAs, which are controlled by envelopes. The modulators work with AD, AR or ADSR characteristic. The behaviour can be selected via toggle switch. The timer input can be used to control jumper-selectable parameters (A, D/R or A+D/R). In addition, the two channels are equipped with a ducking input, which can be used to mute the VCA using an external control voltage.

The module A-142-4 consists of four envelopes with exactly one parameter: decay

The four envelopes can be chained for creating a multi-stage envelope available at the Mix output. You can determine at which threshold if the decay stage the next envelope will be started. A bi-polar attenuator at each envelope determines if it wil be added normally or inverted to the mix.

Quad ADSR type envelope generator with time ranges of 0.2ms to 5min. Each ADSR units has a gate- and a retrigger input as well as one output and a time range switch.
Quite interesting are the "end-of" outputs which provide you with gate signals after the corresponding time stage has been finished. You can use this gate signal to start further ADSRs and thus for creating complex envelopes, pseudo LFOs etc.

Airstreamer is a function generator with AD, ASR and loop mode. The curves can be altered in shape. A 1V/octave input makes it possible to play the module like an oscillator.

The Grand Terminal is a digital multipurpose module for ambitious sound designers. It contains two function generators, which can be used as envelopes, LFOs or VCOs, two filter channels with eight modes of operation, mixing and routing options as well as a multi effects unit. Considering this feature set, it is safe to say that the Grand Terminal is more than the sum of its parts. It is a complete synthesizer voice, which can also be used as a dual mono or stereo filter plus reverb, delay respectively chorus processor and modulators. Despite its high complexity, handling the unit is easy as pie. The sound is crystal clear and, thanks to all the filter types and effect algorithms, very versatile. Simply put it in your modular and take off!

The Grand Terminal is a digital multipurpose module for ambitious sound designers. It contains two function generators, which can be used as envelopes, LFOs or VCOs, two filter channels with eight modes of operation, mixing and routing options as well as a multi effects unit. Considering this feature set, it is safe to say that the Grand Terminal is more than the sum of its parts. It is a complete synthesizer voice, which can also be used as a dual mono or stereo filter plus reverb, delay respectively chorus processor and modulators. Despite its high complexity, handling the unit is easy as pie. The sound is crystal clear and, thanks to all the filter types and effect algorithms, very versatile. Simply put it in your modular and take off!

Small, yet versatile envelope plus VCA – The Pico Modulator is an envelope generator with AD and ASR modes. The circuit can work with linear or exponential curve shapes. Thanks to its loop function, the module is also usable as a LFO. Furthermore, the Pico Modulator comes equipped with a VCA, which is controlled by the envelope.

Compact and flexible looping AD/ASR envelope generator from Erica Synth. The Pico VC EG features automatic Trigger/Gate detection, as well as a special “drone mode” which fully opens the envelope at full CW setting of the Decay knob. Attack and decay times can be voltage controlled. Furthermore a switch enables Looping mode which makes all kinds of scenarios possible.

Dualkey is composed of two modulators, which can be used as A(H)D, A(S)R or looping envelopes. The circuits are activated by push-buttons or gate inputs. Length and shape of the envelopes can be adjusted via potentiometers. Additionally, there are CV inputs for modulations. At the end of decay respectively release phases, trigger voltages are generated, meaning it is possible to link both modulators. The same way, several Dualkeys can be daisy-chained. On top of all that, the module generates gate signals.

Synesthesia features four independent envelope followers with adjustable sensitivity. Thanks to Thru connectors, you don’t need to split audio material, but can simply pass signals through the module.

Synesthesia features four independent envelope followers with adjustable sensitivity. Thanks to Thru connectors, you don’t need to split audio material, but can simply pass signals through the module.

Falistri definitely is a strong competitor to another module with a confusing name – the Make Noise Maths. In essence Falistri is a fully featured dual envelope generator / LFO / oscillator. But additionally, you will also find a Ringmodulator and a Slew Limiter plus a Flip-Flop. Altogether these (sub-)units beg for creative re-patching. Another feature that stands out is that you can alter the shape of the envelopes independently of the overall time! That is a feature rarely seen and mostly done digital. The Falistri however is analog through and through. No DSPs here. We see this module as a possible center piece for many (and especially small) systems!

The CEMvelope from Frequency Central is an envelope generator, based on the legendary ADSR section of the Sequential Circuits Pro-One synthesizer. Each segment of the envelope is controlled through a dedicated knob. Build around the CEM3310 or the newer AS3310, the envelope is smooth and very snappy. It features a gate input as well as a trigger input. The trigger input works in conjunction with the gate input for multiple triggering from a suitable controller device. Furthermore the module provides a positive and a negative output. The envelope voltage is visualised thanks to an LED.

Inconspicuous small ADSR type envelope but with an astonishing supersnappy punch! It is a clone of Roland's 100m modular system's envelope generator.

Grp’s ADSR module is a classic envelope with attack, decay, sustain and release phases. Three time ranges are available (slow, medium, fast). Thanks to a Thru socket, incoming gate signals can be passed on to other modules. Furthermore, there are positive and negative outputs.

The Galilean Moons module consists of two identical function generator and VCA units. As the function generators are normalized to the VCAs, you can easily create an synth voice by inserting an audio signal. Due to the envelope generators' behaviour the voice is great for percussive sounds but it's not limited to it.
Besides of this the module is intended to be an expander for the Hexinverter module Jupiter Storm.

Cèis is a fully analog, CV controllable ADSR envelope generator. This module allows full voltage control over the 4 segment faders with multiple gate/trigger outputs for maximum versatility of a classic tool.

The Intellijel Quadrax is a CV controllable quad function generator with burst mode. The envelopes all feature a continuously variable response curve, and each stage can range from 0,3 to 20 seconds. Channels can be chained together to create complex multi-stage envelopes. LFOs can be either free-running or beat-synchronized using the channel’s trigger input. Furthermore four freely-assignable CV inputs are capable of modulating any or all of the various parameters across all four channels using the built-in CV matrix.

Dual ADSR that is based on the envelope of the Roland SH-101, but several enhancements. Besides the funky faders it has a cycle mode, trigger buttons and some more features.

The Joranalogue Contour 1 can operate as a slew limiter, but can also be used as a voltage-controlled envelope generator, envelope follower, frequency divider, low-frequency or audio oscillator. This module is therefore a true multifunctional talent and it works very precisely which makes it ideal for processing pitches. The Contour1 is very easy to use thanks to sliders for setting the rise and fall times and a button for triggering. The Hold input allows you to freeze the core and pause the envelope or LFO.

Quadigy offers four envelope generators with lots of cool features. The response of each envelope can be continuously adjusted from linear to exponential. The output level may be individually attenuated and also inverted. The module is easy to program using sophisticated controls and the display. The complete settings of the module are stored in 32 memory locations for later recall. Quadigy offers a live mode and is therefore the perfect envelope generator for live use.

Leap offers a fully voltage-controllable ADSR envelope with looping option as well as a LFO with sync and 1V octave functionality.