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

MFB’s Loop ADSR is an exceptionally fast envelope with variable curve shapes. More precisely, you can crossfade between linear and logarithmic characteristic. Attack, decay and release phase can be edited manually plus there is a CV input per parameter. Thanks to a loop function, the module can be used as a LFO as well. The frequency goes up into the audible spectrum. In short: A great envelope for price savvy musicians!

The ADSR envelope from Birdkids offers high flexibility. It comes equipped with six modes of operation, three curve shapes and variable ranges for attack, decay and release stages. The module occupies only 4HP in a Eurorack case.

Contour is a quad envelope generator with attack and decay stages. They can not only be adjusted manually, but modulated by control voltages as well. Loop functions allow the user to employ the circuits as LFOs. The shapes of attack and decay stages are switchable between linear and exponential characteristic. CV signals emitted by the module can be leveled and inverted. A chaining feature makes it possible to combine two or more of the Contour’s envelopes.

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 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!

Vintage edition with a black faceplate and custom knobs.

Much more than just a plain slew limiter - The A-171-2 is a multi-functional module for generating and processing control voltages and audio signals in the manner of a function generator. LFO, envelope generator, slew limiter... a lot of functions are possible! You can even use the module as a simple waveshaper or a very rudimental filter. The A-171-2 has been created in licence from Ken Stone/CGS and is more or less a revised successor to the Bananalogue VCS.

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.

A Programmable Universal CV Generator whose basic functionality is drawn from the E-mu Morpheus’s insanely powerful (but hard to program on a two-line display) Function Generators. But now expanded into a supremely flexible modulation source encompassing elaborate one-shot contours, evolving cyclical patterns and sequences of arbitrary length and complexity.

You need plenty of modulation workhorses like LFOs or envelopes rather than multi-functional and complicated function generators? Then look no further because the AD/LFO has what you need and that is six digital channels. Each three channels can be either an AD envelope or a LFO, are available as a mix at sum outputs and can work ten times slower at the press of a button.

This one is a function generator of a different kind, or in better words on a different stage of evolution. Basically it contains six function generators which can be tirggered individuaklly and feature individual outputs, yet are controlled together. It generates more than sawtooths and triangles, but also pulses and even sine waves thanks to waveshaping.
Once the module oscillates the function generators can produce six divided or multiplicators of the frequency which is especially interesting in audio mode, even more if the mix output is used!

What else: VCO waveshaping like on the Mangrove, VC of all parameters, 1V/oct tracking and Thru-Zero FM. Great as a modulator, awesome as an oscillator!

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.

Date of availability still not known, sorry.

The omnimod is a four-channel modulation source. Per channel encoders are used to set up to 64 break points and to shape envelopes. At each point of the envelope you have the ability to to set height, shift, number of repetitions and the curve shape - that's what we call a real multi-stage envelope and it even has an OLED display to show what you're doing.
Inputs can be used to trigger and even to clock the channels, advancing from break point to braekpoint and thus playing sequences! Instead a clock use a CV to control the phase. The module has an oscillosope and can act as an envelope follower, to top it all.

Into just two HP QuBit Electronix squeezes as much as possbile into the EON: an attack-decay envelope generator with cycle mode, a combination of a square wave oscillator and a triangle LFO and then a digital noise generator with downsampling and random gates. Two outputs carry entirely different signals. Oh yeah, this wee thing is even voltage controllable! Good job, QuBit!

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.

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.

The Quad Envelope consists of four AHDSR modulators. Various modes of operation, including loop and synchronization functions, make the module exceptionally flexible. Thanks to integrated sequencers, movements of attack, hold, decay, sustain and release faders can be recorded. – A great feature, especially for generating lively basses, pads and experimental percussion.

Zadar is an innovative quad envelope which can be utilized as a multi-track modulation sequencer, LFO or exciter for resonators as well. The module uses Vector models with up to 1000 segments to generate control voltages. The preset selection ranges from simple transients and classical envelope curves to complex shapes, such as those based on acoustic instruments, as well as rhythmic sequences, abstract fractals, pseudo-random functions and physical models. Each vector program can be flexibly edited and modulated.

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!

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.

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.

Stages is a special kind of function generator. The module can be used as a multi-stage envelope, a CV sequencer or a combination of an ADSR envelope and two LFOs. – Just to name a few possibilities. Stages contains six segments. Instead of switching between pre-made modes of operation, users are able to alter the behavior and division of the segments freely. Do you need a complex envelope, a CV four-step CV sequencer and an AD envelope or six LFOs right now? – With Stages, you have all of those in your modular system… and much more!

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.

The DSG is one of the most versatile modules in the Serge system. – A dual function generator similar to the Make Noise Maths, but with a different feature set. The DSG’s stages can be used as voltage-controlled envelopes respectively LFOs, audio oscillators with variable waveform symmetry, envelope followers, filters or flexible utility circuits. – Just to name a few possibilities. Compared to the original, there is a new pulse output and the pitch tracking has been significantly improved.

Contour is a classic ADSR envelope with some nifty additional features. Attack and sustain parameters feature dedicated potentiometers. Decay and release are controlled mutually via one knob. CV inputs allow users to modulate all time parameters. Contour’s curve shapes can be linear or exponential. – Or anything in between. EON and EOC connectors emit a trigger signal after the attack respectively the release phase is completed. For tapping envelope signals, there are a normal and an inverted output. Contour stands out due to fast response and intuitive operation. The module is a great choice for creating percussive sounds. By connecting the EON output to the gate input, Contour can be transformed into a LFO.

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.

Modulation outpost – Satellite can be filled with presets and sequences created using a Control Forge. The module acts as a self-contained CV generator. Thanks to a wide array of control voltage inputs, musicians can influence the circuit in various ways. CV and trigger signals are emitted via several connectors. – If one Control Forge isn’t enough for the patches at hand, here is the chance to expand your setup in a cost-effective, space-saving way.

The Mini Slew's distinguished feature is the Time Compensation function: when altering the curve shape the frequency remains relatively unchanged! This makes the module stand out from all other comparable function generators and makes this type of module even more flexible, be it when used as LFO or as a VCO with voltage controlled wave shaping. A propos voltage control: curve form and output level can be modulated and the cycle function turned on and off by using gates. Kudos to WMD and SSF for the good work!

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.

MATHS is a Swiss Army knife, a very versatile module containing analog computers' funcions : integrating, inverting, addition and scaling of signals.
But what does it all mean in the end? Well, you can use the module as a slew limiter envelope generator, oscillator or LFO. Equally you can process CV and audio signals, for example attenuate, invert and mix them.

Another Wiard module in the Eurorack form factor is the Envelator.
This unit is a classic AD function generator that can act as a attack/decay envelope generator, a attack/release envelope generator or as a LFO with an interesting delay function.
Using the CV inputs for controlling the A/D times will create living modulations and the two pulse outputs allow for triggering other envelopes for instance.

The Intellijel QUADRA module is a quad function generator. Each of the four channels can be used as an envelope or as LFO.

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 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.)

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.

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.

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.

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.

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

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-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 Z4000 is a snappy ADSR envelope. Thanks to a built-in CV processor, signals generated by the module can be scaled, inverted and offset. All four envelope parameters are voltage controllable. Furthermore, the curve of the attack phase can be edited.

The Multimode Envelope´s name already indicates it: this is not a trivial ADSR but an envelope with a number of selectable modes: AR, ADR, some modes with dual triggering and also cycling modes are possible by the digital control of the analog envelope generator. In addition you can set characteristics of attack, decay and release time parameters.

An expander module that is available separately gives you the possibility of voltage control of attack, decay, sustain and release parameters and has some other features as well.

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.

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.

This dual, complex envelope generator offers various simultaneously available envelope types emitted at individual outputs. Voltage control of all time parameters and of sustain levels plus numerous pulse outputs invite to cross-patching, to create LFOs or for generating even more complex envelopes.

Sinclastic Empulatrix combines a very percussive Attack-Decay envelope generator with a VCA in just four HP width. The envelope output is nrmalized to the VCA and for that reason the module is just perfect when you want to create your own drum voices - just connect an audio source and a gate - ready! On the other hand it's very handy when you fly a lot to gigs and need a compact system.

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.

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.