modular systems » Eurorack modules

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!

Rotating Clock Divider Divide-by-1 to Divide-by-64, on 8 output jacks CV Rotate jack to shift divide-by amount on each jack CV Reset jack to reset/re-sync all jacks Optional break-out panels to expand functionality (MIDI, Auto-reset, selectable Divide-by range)

The breakout module for the Rotating Clock Divider has to be connected to the internal jumpers of the RCD and allows for switching the division factors, counting direction and automatic reset.

Unlike a clock divider, the Shuffling clock multiplier can output a multiplierd, accelerated clock! Three outputs carry a straigh clock, five outputs give you clock signal which can be influenced by the means of shuffling, pushing forward in time or skipping clocks. A CV at the rotate input can alter the multiplication factor of the eight outputs in realtime.

Expansion for the Shuffling Clock Multiplier offering additional possibilities to play with. To be connected with the SCM on the backside.

The VCA Matrix module by 4ms is a playable 4x4 matrix of 16 VCAs.

Four CV or audio inputs can be routed in any amount/combination to four outputs, using the 16 CV control jacks, Level knobs, and Mute buttons. Suitable as a 4x4 mixer, splitter, as well as dynamic signal router/processor.

Vactrol-based multimode filter based on a schematic by Nyle Steiner. Separate inputs for lowpass, bandpass and highpass.

Vactrol based combination of resonant 12dB lowpass filter and/or VCA. Inspired by the Buchla 292.

Very complex modular 12-stage phase shifter with separate in- and outputs for all phaser stages which allows eg. flexible feedback patching. The use of vactrols makes the A-101-3 sounds very soft.

Reproduction of the legendary british diode lowpass filter. Resonance is possible up to self-oscillation but the behavior changes with the cutoff-frequency.

18dB low pass filter based on a modified Moog cascade. Resonance goes up to self-oscillation. The module sounds similar to the TB-303.

Another filter that uses the circuitry of a classic. This time it´s the Oberheim SEM (Synthesizer Expander Module), that was used in the Four-Voice and Eight-Voice for instance. The filter has a saturated fat sound and especially in lowpass mode it growls in the bass range, very mighty and powerful. The very sensitive audio input allows distortion of the audio signal which forms the sound even more.

A-106-6 works with the Oberheim Xpander's filter topology and features it's sixteen filter types, arranged in two banks. Each filter tyes are available simultaneously at individual outputs. Besides the usual filter types with different slopes you'll also find combinations of differenty filter types and all-pass filters as well.

The module contains 26 very different filter types which can be combined each after the other. You can morph or switch between those filter chains manually, with contol voltage or with a clock signal. 15 filter types are known from the Oberheim Matrix 12 and there additional 21 new filter types.

The A-108 is a classic Moog lowpass filter with up to 48dB slope and a very soft and round sound. There are four lowpass outputs for 6, 12, 24, 48dB and also a banpass output.

The standard VCO provides two CV inputs for pitch, an octave switch, four waveforms with separate outputs, pulse width modulation and hard sync. After the pre-heating time the VCO is stable in a range of 3.5 octaves. A basic VCO "workhorse" without many gadgets.

Voltage controlled sampler module which can also be used as wavetable oscillator and simple digital effect device. Due to its audio resoultion of 8bit, the A-112´s sound is comparable to early samplers that are quite rough but can be distinctive and somewhat charming. In combination with the wavetabe oscillator function the A-112 makes up an interesting additional sound source for the modular system.

A sound source for generating subharmonic minor-chords like in the Trautonium. It contains four parallel frequency dividers with factor 1-24, which derive fixed partial frequencies - the so called subharmonics - out of the frequency of an external  master VCO. The module has 50 memory banks each for 4 mixtures, i.e. mixes of partial frequencies.

Two identical ring modulators in one module. Suits very well for creating metallic or bell-like sounds by multiplication of the frequencies of two sound sources.

Fourfold frequency divider for creating up to four suboctaves. Separate controls for the level of the original frequency, 1/2 frequency (1st sub octave), 1/4, 1/8 and 1/16. The output signals are symmetrical square waves.

Waveforms of the audio signal can be modified and distorted dynamicly with the A-116. You can attenuate the signal, clip and amplify it asymetrically in two parallel stages. Clipping and symetry can be also changed with a control voltage for a living sound.

The A-117 provides two units: a digital noise source with variable clock rate for noise and digital random as well as a nice 808-ish sound source with two or six oscillators for cowbell, hi hat or cymbal sounds.

Analog noise and random. White noise output and one out for colored noise with level controls for red and blue spectral amount. The same controls affect the amplitude of the random signal. Additionally there are controls for the speed and the overall amplitude of the random voltage.

Pre-amplifier for microphone- and line-signals and an envelope follower. If the signal exceeds a certain (adjustable) threshold a comparator outputs a gate signal which you can e.g. use to fire an envelope. But you can use the module also as a small active multiple.

The A-120 features the classic Moog low pass filter built around a transistor cascade It has a slope of 24dB per octaveand three three modulation inputs for controlling the cutoff frequency. Self-oscillation of the resonance is possible only above ca. 300Hz.

24dB low pass filter based on a Curtis filter circuit which is known from many polyphonic 1980s synthesizers. It features voltage control of cutoff frequency and resonance; self-oscillation is possible, too.

A multimode filter is based on a very special filter circuit used in the EPD Wasp, an English synthesizer of the late 1970ies. The sound is full of character, dirty, with an unstable resonance and a trend to distort. Who is in search of a very aggressive, sick filter definitely should take the A-124 into consideration.

A classic voltage controlled phase shifter, also called a phaser. It features as shift-CV input with attenuator, controls for volume of the audio signal, manual phase shift, resonance and wet/dry mix.

Three parallel, voltage controlled, resonant bandpass filters (each switchable to lowpass per jumper), each with an own LFO or CV input with attenuator. Separate outputs for each filter and a mixed output. Very well suitable for living filtering or as a formant filter with modulation (unlike A-104).

Fixed filterbank with a low pass, thirteen bandpass filters and one high pass. Each filter has a level control which even enables you to mute the specifical band.

The A-130 is a VCA with linear characteristic, thus primarily intended for controlling the level of CVs. It offers two signal inputs and a output with adjustable volume. amplification is set with a Gain control and two modulation inputs.

The A-131 is a VCA with a exponential characteristic and is intended for controlling the level of audio signals by voltages. Improved version since 2013

The A-132 is a simple module housing two identical low-cost VCA units with linear characteristic. The main purpose is controlling the intensity of control voltages but audio can be controlled if necessary.

The module A-132-2 is a quad VCA with a linear curve. Although it provides you with four inputs and four outputs you can control their level simultaneously only, with a potentiometer and control voltages.

Two identical VCAs whose characteristic can be selected between linear or exponential each, ie. they can process as well audio as CV signals. The VCAs don't have attenuators at the signal inputs but they can handle also very loud signals of 16Vpp amplitude (-8V to +8V) without distorting.

Four exponential VCAs on the most compact room. The VCAs don´t have attenuators at the signal inputs but they can handle also very loud signals of 16Vpp amplitude (-8V to +8V) without distorting.

The four VCAs can be cascaded so the very last output carries the sum of all 4 VCAs.

Two voltage controllable amplifiers which can amplify positively or inverted. As this module is a somewhat different VCA you can use it for AM sounds or even as a ring modulator!

This universal module enables you to pan one signal between two outputs, to crossfading two inputs to one output or a combination of both functions. You can process audio and control voltages.

Dual crossfader module for voltage controlled morphing between two audio or CV signals. By setting a jumper you can determine if the module will react asymmetrically to positive CVs (eg. ADSR) or symetrically to bi-directional CVs (eg. LFO). Both crossfaders can be controleld with one common CV.

Voltage controlled audio mixer. Four channels are mixed to one mono output. Volume of each channel can be modulated by a control voltage - like with four VCAs. Each channel has an attenuator on the audio- and CV-input as well as a gain control. A soft fade-over of 4 audio signals with only one control voltage is possible with the A-144 morphing controller.
The new version (since April 2013) is able to process DC signals, has individual outputs per channel and is only 18HP wide.

Distortion / Waveshaper module for dynamic distortion of audio signals with extended settings. The applications of this module are waveform modifications and distortion like clipping and waveshaping of audio signals and control voltages (e.g. LFO).

A well engineered, flexible wave multiplier module. Its primary use is a dynamic wave multiplication, distorting and folding waveforms, no matter if audio or control signals. All parameters except input volume can be modulated via control voltages.

The Wave Multiplier 2 takes a wave at the input and creates four phase-shifted copies of that signal at the output. Each of the four copies can be individually shifted in phase what creates living sound resembling four oscillators. This effect is called wave animation.

Linear mixer for mixing up to 4 signals to one output. Works best with CVs, but audio is possible, too. If there´s no jack in input 1, you can use the level control 1 as an offset control.

Logarithmic mixer for mixing up to 4 signals to one output. Works best with audio, but CVs are possible, too. If there´s no jack in input 1, you can use the level-control 1 as an offset control.

Four-channel mixer module which can add signals (positive amplification) or subtract (negative amplification) them from the output signal. Additionally there´s a polarizer at the output which controls the output signal. The module is intended for adding/subtracting control voltages, but interesting, discreet effects can be achieved with audio signals shifted in phase.

The A-138d primarily is used for crossfading between two modular signals. On the other hand you can used it for inserting stompboxes or other effects into your modular system.

A-138e ist a multifunctional module with four identical units for mixing and fading signals.

The A-138m is a 4x4 mix matrix where you can mix up to four incoming signals in all possible variations to four outgoing switches. The Signals can be audio and/or voltage controls.

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.

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 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.

A workhorse for modulations with four identical simple LFOs oscillating between 1/30Hz and 4-5 kHz. Each LFO features a frequency control, a switch for the time range and outputs for triangle, rectangle and rising sawtooth.

The A-143-4 contains four voltage controlled LFOs / VCOs with triangle and rectangle outputs in one single module.

Voltage controlled sine-LFO with four separate, phase shifted outputs: 0° (sine), 90° (cosine), 180° (inverted sine) and 270° (inverted cosine). Suitable for FM, cross-fadings, modulations in opposite directions or applications, where a pure sine is needed like oscillator for a frequency shifter.

The A-144 morphing controller is a module for generating control voltages which are to be used in a morphing application, especially with a voltage controlled mixer like the A-135.

Modulation generator with five waveforms at separate outputs, three selectable frequency ranges and a reset input.

The module A-146 is a LFO with three waveforms which are variable. For instance you can adjust the pulse width of the square waves or blend from the sawtooth wave to a triangle.

Two simple sample & hold units in one module for generating stepped random voltages or for slicing signals. For each unit you can individually change the mode from sample & hold to the similar track & hold.

This module is based on the legendary Buchla 265 / 266 Source of Uncertainty and is a exceedingly complex random voltage generator. On the one hand it provides quantised random voltages with voltage controllable amplitude (or: amount of possible random voltages) and on the other hand random signals with 256 possible states whose probability and distribution can be set manually or per control voltage.

The A-149-2 is an expansion module to the A-149-1 and it generates random gate signals at eight outputs.

Two independent voltage controlled switches in one module. You can route signals by switching. Either you switch one input signal between two outputs - or two input signals between one output.

Electronic switch with up to four steps. At each trigger impulse the input signal is being switched sequentially form the common input to the four inputs. The module works bi-directionally.

The module A-152 is a complex switch / multiplexer unit with additional features:

1. eight-fold bidirectional electronic switch (in- and outputs can be swapped) with the possibility to address the stages with a CV or to step from one stage to the next with a clock signal. All signals of the a-100 can be switched, even audio.
2. eight-fold track-and-hold

The A-154 is an additional module for Doepfer's Eurorack sequencer a-155 and it expands it by a number of very interesting functions like new modes of operation which can be selected by CV, including an one-shop option and even voltage controlled step addressing. A voltage controllable clock generator with variable pulse width is included as well. It's even possible to connect and control two A-155s either in parallel or in series for creating a 16-step sequencer.

Analog sequencer for CVs and trigger/gates. Two CV rows, each with selectable voltage range, glide and sample & hold optons. Three trigger rows and a one gate row. Logic inputs for clock, reset, start and stop. It's even possible to insert external signals per step instead, overriding the CV generated by the 2nd row's potentiometer.

The module A-156 is a dual quantizer for CVs, converting a continuous positive input voltage into a stepped output voltage. The steps have an interval of exactly 1/12V, ergo one semitone with the 1V/oct characteristic. This makes tuning an analog sequencer pretty easy but the module can of course quantise other control voltages like envelopes, noise or random signals.

The A-160-1 is a frequency divider for clock, trigger and gate signals, designed to be a source of lower frequencies, particularly for rhythmical uses. The available dividers are exclusively even numbers. Additionaly there is a reset input which sets all outputs to "zero".

The module A-161 clock sequencer is an additional module for the A-160 (which is needed for operation). It sequentially switches between its eight outputs. It enables you to create short analogue sequences or to trigger envelope generators periodically. A reset on the A-160 has also an effect on the A-161.

Dual circuitry for delaying trigger signals. Each of the units makes it possible to delay the onset of a trigger pulse and also change its length.

Voltage controlled frequency divider with divisors ranging from 1 to aaproximately 20. Even odd divisors are possible! It has a manual control for changing the divisor factor and CV input with polarizer (attenuator / inverter). The output signal is a square wave.

Two individual inverters and modifiers for logic signals like triggers, gates and clocks. The module is used for adapting levels and logic states to ther units like external sequencers as well.

In this module we find two sections which work with the principles of Boolean Logic. Each has three inputs with their logic states ("1" = high / "0" = low) being compared, combined and finally output at three logic outputs: AND, OR and exclusive OR (EXOR). In addition there are two logic inverters for switching the logic states.
The A-166 is a really good module for combining and linking digital signals like clocks, triggers and gates.

Analog comparator that compares two analog voltages with each other and derives a gate signal. Either two external signals can be compared or one external voltage with the internally set value. The module can also be used as a subtractor or a offset generator.

Two separate slew limiters for generating portamento effects. Abrupt changes of a signal can be "smoothed" this way. The upper slew limiter has one common control while the upper has separate controls for setting the rising and falling slew time.

Module for processing/mixing of control voltages. The signals at the four inputs are being mixed together, the outputs give you the current maximum resp. minimum voltage of the sum of the four input signals.

A-174-2 is a modulation wheel module with two wheels. While the left one is centered and spring-loaded like a pitch bend wheel, the right one acts like a classic modulation wheel.

The dual voltage inverter is exactly what it says it is: two identical inverters, which will take a voltage and output it in an inverted form - so that an input of eg. 5V will be output as -5V at the "inv out". The second input can give you the unprocessed original signal, too. Two LEDs give a visual indication of the (positive or negative) output signal.

Three independent voltage sources that produce constant (control) voltages. Two of the voltage generators have a control for fine adjustment what is very practical if you want to tune VCOs exaclty. With a little jumper you can decide for each of the three sources if it gives out -2,5v to 2,5v or 0 to 5V !

To control modular parameters easily over footpedals the A-177 is a brilliant help: A connected foot controller in the upper switch generates a control VC, at the other one a dual footswitch can generate two independent trigger/gate voltages for instance. The module has been optimized for the fatar products FP-5 and VFP2, that you can also get from us.

Theremin controller module for generating a variable control voltage by approaching/removing hand to/from an antenna. A gate signal can be generated, too if the voltage exceeds a certain threshold set by the according control. For emulating a thrermin you need two A-178s: one for the pitch and one for the volume.

Passive adaptor module that converts from 6,3mm (1/4") jack to 3,5mm (1/8"). Either 1x 6,3mm mono --> 2x 3,5mm mono (like a small multiple) or 1x 6,3mm stereo --> 2x 3,5mm mono.

Multiplier module. The module differs from the A-180 as you can find a rocker switch side by side to the socket which assigns the incoming signal to buss 1 or buss 2. All sockets which have the switch in the same position are connected together. So you can connect easily 3 and 5 sockets together or 4 and 4 and configure the multiple as you like.

dual passive attenuator very senseful for systems with modular combinations of different manufacturers.. where you have internal attenuators sometimes at the output and sometimes at the input stage.

As an offset generator the module supplies a voltage from 0 to 5 or from -5 to 5V, the attenuator can set an incoming signal to be added to the offset voltage, this signal can be inverted in addition making the tiny thing a polarizer module in addition.

To make the uncounted modules of different manufacturers and/or other units compatible with each other this module has been created: The control voltages are sometimes needed with 5 Volts or even higher to make an envelope start or a sequencer run so here you can lift outgoing lower voltages to that certain level. It can alo be used to amplify your audio signals.

The Bus Access module makes possible to "write" external CV/Gate signals to the internal A-100 bus via 3,5mm sockets. This is recommended when using an external MIDI/CV interface, if you run many VCOs of if you like to have the same bus on several A-100 frames. Additionally you can split the input signal via four buffered outputs.

The A-185-2 allows you to send up to four control voltages simultaneously (e.g. sequencer and keyboard for transposing a pattern) to one or more VCOs. There are three buffered outputs and an inverted one.

This small module combines up to seven gate or trigger signals and sends them to one output; basically it´s a simple passive mixer for gate signals.

If all seven inputs are "low" there is no gate at the output. When one or more inputs switch to "high", a gate signal occurs at the output.

Module A-187-1 is a DSP based effects module with voltage control of parameters of effects like delay, reverb, pitch shift or equalizer.

The A-188-1 series bases on a so-called bucket brigade device (BBD) that has been used in the pseudo-digital delays of the 1980s.
The version with 512 stages provides a delay time of 1.02 - 512 ms.

The A-188-1 series bases on a so-called bucket brigade device (BBD) that has been used in the pseudo-digital BBD-delays.
The version with 1024 stages provides a delay time of 2.05- 1024 ms.

The A-188-1 series bases on a so-called bucket brigade device (BBD) that has been used in the pseudo-digital delays of the 1980s.
The version with 2048 stages provides a delay time range of 4.10 - 2048ms.

The A-188-1 series bases on a so-called bucket brigade device (BBD) that has been used in the pseudo-digital BBD-delays.
The version with 4096 stages provides a delay time of 8.19 - 4096 ms.

The A-188-1 series bases on a so-called bucket brigade device (BBD) that has been used in the pseudo-digital BBD-delays.
The version with 128 stages provides a delay time of 0.26 - 128ms and is great for Karpluss-Strong synthesis.

The A-188-1 series bases on a co-called bucket brigade device (BBD) that has been used in the pseudo-digital BBD-delays.
The version with 256 stages provides a delay time of 0.51 - 256ms and is great for Karpluss-Strong synthesis.

Delay based on a bucket brigade device (BBD). Six parallel delay taps with single outputs.

The taps allow maximal delay times of 396, 662, 1194, 1726, 2790 and 3328ms. There are two sections, each allows a individual mixture of the delay taps at mix outputs that have a dry/wet control. CV control of common delay time; complex positive/negative feedback.

The A-189-1 is the first derivative of the universal AD/DA module. It offers several voltage controlled algorithmic functions like voltage controlled bit crunching, bit shifting (with/without carry over), bit exchange, rectifying, absolute value and calculating operations like addition, subtraction, multiplication or division.

The A-190-2 is a compact, economically priced alternative to the A-190-1. It can be used in all cases where the additional features of the A-190-1 are not required (e.g. clock output, start/stop output). A-190-2 is the modular version of the established MCV4 with some changes to adapt the modular system.

Module A-190-3 is a Midi/USB-to-CV/Gate interface that allows the integration of the A-100 system into a USB or Midi environment. It has 4 analog control voltage outputs (CV1...4) and one gate output. A-190-3 is the modular version of Doepfer´s Dark Link standalone interface.

A-192 converts 16 control voltages into 16 arbitrary MIDI controllers on arbitrary MIDI channels.  128 different assignments (Presets) of the 16 CV inputs to MIDI controller messages are available.  MIDI messages appearing the MIDI Input are merged to the MIDI controller messages generated by the A-192.

The snapshot button transmits the 16 momentary states of the 16 inputs as MIDI controller messages.

A phase-locked-loop module that - said in few words - synchronises the internal high-speed oscillator to an external audio signal. Of course there are some sidetones because this process doesn´t happen perfectly in real time and is a little "lethargic". In-built is a lowpass filter and three different phase comparators that also alter the sound.

A very complex module that needs time to understand!

55cm long combined position- and pressure sensor that is being connected with the module. The sensors generate continuous voltages for controlling any function under voltage control. When the position sensor is being touched or when a certain pressure threshold is exceeded, two independent gate signals are generated.

Spring reverb module with three springs that produce a short, dense reverb. The feedback loop can be interrupted to modify the feedback signal with other audio processors. Wet/dry control. Emphasis control for boosting the mid frequencies.

Multichannel clock source, rhythm generator and LFO - Pamela’s New Workout features eight outputs, which can emit clock signals as well as shapeable waveforms. By combining several channels, it is possible to create snappy beats. Humanize and swing parameters provide the right groove for every occasion. Lots of functions can be modulated. Thanks to the module’s rewritten software and a new OLED display, handling the unit is as easy as with the predecessor. – Even though the functional range grew considerably.

Autobot is the monophonic sequencer from the Bassline 3 in Eurorack format enhanced with some additional trigger outputs.

The M303 is an entire synthesizer voice and to be exact a clone of the TB-303´s analog circuitry in a single Eurorack module. Imagine it as a modular vesion of the Acidlab Bassline without the sequencer but with aditional CV inputs instead.

This module contains an analog high-quality ring modulator and a 1x4 multiples.

The RS-35 External Processor contains three circuits for extracting coltrol voltages from an audio signal: A frequency-to-voltage generator, a level-to-voltage generator and a trigger generator.

The RS-40 contains three different circuits: noise generator, sample and hold and a clock generator. The noise and the clock provide suitable signals for the use with the S&H unit although they aren't pre-patched for technical reasons.

The RS-50 contains three cicuits in one module: trigger generator, pulse shaper and an offset generator called shifter.

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.

In the RS-70 module you will find an inverter with integrated slew limiter and also a pre-amp.

The Analogue systems RS-85 module is a voltage controlled LFO with four wave form outputs, reset and a very wide frequency range, up to audio frequencies so you can use the module as an auxilliary oscillator.
Thanks to a new dual-bus concept, this circuit is fully compatible to Doepfer’s Eurorack standard.

The RS95 by Analogue Solutions is a premium, british sounding VCO with waveshaping possiblities. It is based on the RS90 but has more features, predominantly a very special sine wave. The RS95e presented here is technically identical but instead a normal frequency control it features a gorgeous, lockable (!) potentiometer with ten turns. That allows precise fine tune control and adds the look of an EMS synthesizer to the VCO.
Thanks to a new dual-bus concept, this circuit is fully compatible to Doepfer’s Eurorack standard.

This low pass filter is a very good -24dB/octave Moog filter, based on the classic Moog cascade with selected, low-noise transistors.

Being the successor of the RS-100, the new "S" version features several improvements regarding stability, tracking, distortion behavoiur and also the frequency range.

The RS-110 is a resonant analog multimode filter with excellent sound, resonance and four simultaneously available filter types. An insert function in the feedback loop allows you to insert other audio processors.
Thanks to a new dual-bus concept, this circuit is fully compatible to Doepfer’s Eurorack standard.

The RS-120 is quite an unusual filter because unlike other filters it cuts several notches into the audio signal which result in a comb-like look of the frequency spectrum. Soundwise it is perfectly suited to create phaser and flanger sounds.

The Programmable Scale Generator exceeds the possibilities of an ordinary quantiser module. While a quantiser usually is chromatic only and with a little luck it allows major and minor scales, a programmable scale generator like the RS-130 makes it possible to freely program scales beyond the customary semitone scale with all their derivates. Scales with quarter-note or eighth-note intervals are possbile which is important e.g. for indian or oriental music.

The RS-140 converts MIDI messages into control voltages and due its numerous analog outouts it gives you plenty of possibilities to control your modular system with MIDI. Besides the usual CV and gate outputs if has in addition flexible controller outputs and it´s big backlit display and four function buttons make it easy to use.

Sequential switch module for switching up to four input signals to one common output. The switching ist done manually or by an incoming trigger signal. the reset function allows for shortening the sequence length.

3U mixer module for mixing four signals to one output.

3U mixer module for mixing four audio signals to one output.

Classic multiples module for splitting signals, e.g. for sending one modulation to different destinations. It contains two passive five-way multiples.

VCA module with exponential and linear control inputs. This way it can be controlled by any type of control voltages and it is suitable to control both audio signals and CVs.

A true analog step sequencer with three rows of eight steps for generating control voltages and trigger signals. The RDS200 impresses with an internal, voltage controllable clock generator, portamento, reset start/stop functions and a voltage influenced skip feature.

Filterbank module with eight fixed filter frequencies, each one octave apart. It is the successor of the RS-210 which was based on a rare 70ies filter bank from EMS. The newer version has different frequencies for a wider frequency range and the filter have a higher slope.

The CV Buffer is a dual active multiples. With this module you can split signals without level loss. Besides that each unit has an inverted output so an inverter is included, too!

The RS-250 is basically only a faceplate with ten 3.5mm jacks not connected to anything, not even to each other. On the back all contacts are accessible to make your own solder connections.

The module makes sense if you want to send e.g signals from your modular system to sockets located in the back of your case. This is a particularly convenient way to make semi-permanent connections to other devices, especially when your modular is installed in a closed rack. It also allows you to connect your modular´s audio outputs to a rackmount patchbay, effects units, or mixer

This quantiser module corrects voltages according to the chromatic semitone scale i.e. one Volt is divided into 12 voltage steps of same size (1/12 V). The input voltage will be adjusted to the next semitone step. This is handy when you want to play tonally with your sequencer, sample and hold or any voltage generator. Beyond this the RS-260 allows for transposition and has two operation modes.

This passive module is a handy converter between different connector formats: 6.35mm jack (1/4"), 3.5mm jack (1/8"), and phono (alias`RCA` or `cinch`) at channels 3 and 4.

The RS-280 is a divider module with a wide frequency range. It can be used to output either clocks with different divisors or sub-octaves of audio signals.

Analogue Systems RS-290 Sampler/Delay is a voltage controlled delay and sampler module. Stunning 46.9khz, 16bit, 5.5 second long stereo echo and delay with user assignable control of MIDI, analogue clocks, triggers, and CV Calculates the correct delay time to the incoming tempo.

Analogue Systems RS-295 expands the RS-290 sampler/delay by a MIDI interface and a second assignable controller.

Unlike a MIDI/CV converter that converts MIDI data into control voltages, a CV-to-MIDI converter goes the other way: it is capable to generate MIDI messages from CV signals!

The RS300 offers eigth fee programmable CV inputs that can produce note numbers or controllers. Note on/off commands, control changes and the generation of MIDI Clock is possible as well. Operation is pretty easy due to a big display and the unit even has memory.

RS-310 is a Reverb/Chorus module with voltage control of dry / wet mix and the delay time. You can create flanger and chorus effects but also short echos and reverbs.
Thanks to a new dual-bus concept, this circuit is fully compatible to Doepfer’s Eurorack standard.

A Gate Delay does what the name says: it can delay a trigger or gate signal. The RS-340 is a multi-mode gate delay that canoutput not only gates with adjustable length but trigger signals as well.

The RS-350 is a voltage controlled Slew Limiter that can be swithced on or off by a positive going gate signal which simplifies creation of TB303-like sequences.

The RS360 Vocal / Phase Filter contains three voltage controlled resonant multimode filters that are summed at the outputs. The low pass and high pass filters with a slope of -24db/octave whilst the band pass and notch filters work with -12dB slope. The module is suited for creating vocal-like sounds and formants.

The mighty RS 370 Polyphonic Harmonic Generator can be used as a digital 6-voice additive polyphonic synthesizer and/or as a six-voice polyphonic MIDI/CV/Gate interface!

The expander module RS375 for the polyphonic harmonic generator RS370 is very recommended if you want to use the capabilities of additive synthesis. It allows you for controlling up to 24 harmonics in realtime via control voltages and 16 potentiometers for direct control. Alternately you can use it for control of envelope parameters.

Useful expander for the RS370 particularly for users who do not require the real-time additive synthesis capabilities of the RS375 module but want to take advantage of 4 extra CV inputs and 4 controller outputs

This very useful module combines in 12HP four completely different sub modules: a voltage controlled LFO, a noise generator, a sample-and-hold type random generator and a VCA.
Thanks to a new dual-bus concept, this circuit is fully compatible to Doepfer’s Eurorack standard.

Digital delay with 16-/ 24-Bit resolution, 46.9kHz sampling rate and a maximum delay time of 3 seconds. It offers one mono input and two separate outputs for creating ping-pong delays. Control voltages can modulate the delay time and the dry/wet mix as well.

Classic phase shifter with voltage control and an integrated LFO which you can tap. The phaser has four stages resulting in two notches in the frequency range only but a distinct sound.