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Cat: 684442 Rel: 30 Oct 18
 
Voltage controlled highpass filter - 8HP
Notes: A-123-2 is a voltage controlled high-pass filter with four filter outputs (6, 12, 18 and 24dB slope). It also features voltage control of the resonance.

These controls and in/outputs are available:

- Audio In with attenuator (Lev)
- Manual Frequency control (Frq)
- FCV1: Frequency control input (~ 1V/oct)
- FCV2: Frequency control input with polarizer
- QCV: Resonance control input with attenuator
- Manual Resonance control (Q)
- 6dB Output
- 12dB Output
- 18dB Output
- 24dB Output
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 1 in stock $121.39
Cat: 671564 Rel: 29 Nov 17
 
12dB multi-mode filter with unique classic circuitry, based on the filter from the 70s EDP Wasp synth
Notes: Module A-124 is a special 12dB multimode filter using the "strange" filter circuit of the "EDP Wasp" (an analog synthesizer with black/yellow case built end of the seventies, manufactured by the UK company "Electronic Dream Plant" with Chris Huggett und Adrian Wagner). This design "abuses" digital inverters as analog operational amplifiers leading to distortions and other "dirty" effects that generate the specific sound of this filter. The filter is equipped with a band pass output and a combined low/notch/high pass output. For this output a control knob defines the relation between low and high pass signal. If both signals appear at the same level (i.e. middle position of the Mix knob) one obtains a notch filter. Otherwise the low or high pass signal predominates. The module does not feature self-oscillation in contrast to most of the other filters of the A-100 system.

Inputs: Audio In, CV In (2x)
Outputs: Bandpass Out, Low/Highpass Mix-Out
Controls: Audio and CV attenuator, Frequency, Resonance, LP/HP Mix

The function and operation of this module is very similar to the module SEM VCF A-106-5. But the sound of both filters is very different! The only functional difference is the position of the sockets and controls, and the function of the controls CV2 (A-124: normal attenuator, A-106-5: polarizer).

- 3U Eurorack module, 8HP wide, 45mm deep
- Current draw 30mA
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 More than 10 in stock $77.44
Cat: 707078 Rel: 23 Oct 18
 
Classic voltage controlled phase shifter - 8HP
Notes: Module A-125 (VC Phaser) is a voltage controlled phase shifter. Phase shifting can be controlled either manually or by voltage control. Other parameters which can be controlled are resonance (governing the depth of the comb filtering, and tonal colour) and mix (the amount of the original signal which is added to the phase-shifted signal). The A-125 is used to generate the typical phaser sound ("jet sound"). Due to the voltage control feature not only the usual LFO-controlled phasings but even ADSR-, random-, sequencer- or S&H-controlled phasings are possible. In combination with the Shepard generator A-191 and several A-125 never ending barberpole phasing effects come true.
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 1 in stock $86.86
Cat: 707080 Rel: 23 Oct 18
 
Breakout module for the A-127 Triple Resonance Filter - 8HP
Notes: This expansion module offers the following additional functions:

- Notch filter for each sub-unit
- Separate outputs for lowpass, high-pass, bandpass and notch for each sub-unit
- Separate audio input with attenuator for each sub-unit

The breakout module allows the separate use of each of the three A-127 filters. In addition, the filters can be patched parallel or serial. Especially the serial connection of three notches generates very complex phasing-like structures. For parallel filter connection the existing mixer of the main module may be used or an external mixer. For serial connection the filters are patched in the desired sequence at the breakout module. A jumper is used to define the filter type for each sub-unit for the mix unit of the main module.

The breakout module can be used without modification only in combination with the new version of the A-127 (PCB printing "Version 4"). Only the new version has the expansion connector available, that is required to connect the breakout module without soldering. It's also possible to combine the breakout module with older versions of the A-127 (versions 1, 2 and 3) but in this case soldering is required to connect the breakout module to the main module (soldering 4 wires to each filter unit).
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 1 in stock $77.44
Cat: 707079 Rel: 23 Oct 18
 
Triple resonance filter unit - 28HP
Notes: Module A-127 is a triple resonance filter unit. It contains three separate voltage-controlled band pass filters. Each filter has its own LFO (triangle waveform) with LED display and adjustable frequency and amplitude. Instead of the internal LFO an external control voltage may be used to control the filter frequency. In this case the external voltage is fed into the external CV jack (with integrated switch to turn off the LFO signal) and the amplitude control of the LFO affects the level of the external CV signal. Each filter is equipped with the following controls: LFO frequency, LFO/external CV amplitude, filter frequency, filter resonance and filter amplitude. In addition to the mix output for all three filters each filter has a separate audio output. The original audio signal can be added to the triple filter mix signal with a separate control. All 3 filters share a common audio input with attenuator. The filter audio inputs are very sensitive so that distortion may intentionally be used to create new sounds - if desired.

The frequency control range of the bandpass filters is about 40Hz...6kHz, the frequency range of the LFO's is about 0.02Hz...20Hz (= 1 min ... 1/20 sec per cycle).

Each of the three filters can used also as a 12dB low pass (with resonance control) instead of band pass. For this a jumper has to be changed on the filter board in question. In this case the module can be called no longer "resonance filter" but "triple low pass filter". It is also possible to modify only one or two of the filters to low pass.
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 1 in stock $167.44
Cat: 707082 Rel: 23 Oct 18
 
Fixed filter bank with 15 parallel bandpass filters - 20HP
Notes: Module A-128 (Fixed Filter Bank) is a filter bank, made up of 15 parallel band pass filters, all with fixed middle frequencies and bandwidth (50 Hz / 75Hz / 110Hz / 150Hz / 220Hz / 350Hz / 500Hz / 750Hz / 1.1kHz / 1.6kHz / 2.2kHz / 3.6kHz / 5.2kHz / 7.5kHz / 11 kHz).

Each band pass filter has its own amplitude control knob, with which that frequency band can be attenuated. The bandwidth of each of the filters is approximately half an octave.

The signal at the output of the A-128 contains a mix of all the filters, depending on the position of each one's amplitude control knob.

The filter bank's main job is to emphasise individual sections of the whole audio frequency range.
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 1 in stock $145.46
Cat: 707084 Rel: 23 Oct 18
 
Linear voltage controlled amplifier - 8HP
Notes: The A-130 is a VCA with linear characteristic, thus primarily intended for controlling the level of CVs. It offers two signal inputs and an output with adjustable volume. Amplification is set with a Gain control and two modulation inputs.

Not only control voltages can be used to "open" the VCA and to let the inputs pass through, there is also a manual gain control. This is pretty handy when you want to modulate the VCA with a bi-polar voltage - just turn up the gain half-way - this way you can use the CV's negative signal parts for closing the VCA.

As the module has two signal inputs often you don't need a mixer before the VCA.
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 3 in stock $61.74
Cat: 710942 Rel: 29 Nov 18
 
Dual VCA with linear response - 4HP
Notes: Module A-132-1 (Dual Low Cost VCA) contains two voltage controlled amplifiers, with a linear response most suited to regulating the level of control voltages (ADSR amount, level of vibrato effect, etc).

In non-critical situations, though, its VCAs can be used to control audio signals.

Amplification is governed by the sum of the voltages patched into the two CV inputs.
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 1 in stock $68.02
Cat: 710943 Rel: 29 Nov 18
 
Quad VCA with linear curve - 8HP
Notes: Module A-132-2 contains four linear VCAs with a common level control section for all four VCAs. The module can be used for all applications of simultaneous amplitude/level control of four different audio or CV signals. The module has a manual level control Amp. and two control voltage inputs CV1 and CV2 available. CV2 is equipped with a polarizer to adjust the effect and polarity of the external control voltage.

The A-132-2 is equipped with an internal connector that can be used to normalize the four input sockets to other modules. So far only the quadrature LFO/VCO A-143-9 is equipped with a suitable matching connector. To connect the A-132-2 and the A-143-9 no soldering is required. A short 10 pin ribbon cable with removable connectors on both ends is used. For the normalling to other modules (e.g. Quad AD/LFO A-143-1, Quad ADSR A-143-2, Quad LFO A-143-3 or other modules with several outputs like VCOs or multimode VCFs) the second side of the ribbon cable has to be wired manually to the outputs of the module in question.

The maximum manual amplification for each channel is about 1.5 (i.e. "Amp." control fully CW). With an external control voltage applied to CV2 the maximum amplification goes beyond 1.5 until the signal starts to clip. The maximum output level is about 20Vpp (i.e. the signal clips at about +10V and -10V).

Typical applications:

Simultaneous level control of up to four modulation sources (e.g. ADSRs, LFOs)

Simultaneous level control of up to four audio sources (e.g. VCO outputs, multimode VCF outputs, multi-channel audio signals)

Simultaneous FM effects with different audio signals (with CV1 or CV2 in audio range)
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 1 in stock $66.97
Cat: 710944 Rel: 29 Nov 18
 
Dual Voltage Controlled Amplifiers (VCA) synth module - 8HP
Notes: Module A-132-3 is composed of two identical voltage controlled amplifiers (VCA). Each VCA has a manual gain control and a control voltage input with attenuator.

The character of the control scale can be switched to linear or exponential.

All inputs and outputs are DC coupled. Consequently the VCAs can be used to process both audio and control voltages.

The input has no attenuator available but is capable to process up to 16Vss signals (i.e. -8V...+8V) without distortion.
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 1 in stock $104.65
Cat: 710948 Rel: 29 Nov 18
 
Four identical voltage controlled amplifiers with exponential control scales - 6HP
Notes: Module A-132-4 contains four identical voltage controlled amplifiers (VCA) with exponential control scales. Each VCA has two control voltage inputs (C1, C2), a signal input (In) and a signal output (Out). The control voltage inputs C1 and the signal inputs can be normalled by means of internal jumpers, i.e. the corresponding input signals of unit #1 can be connected to the switching contacts of unit #2. Those of unit #2 can be normalled to unit #3 and those of unit #3 to unit #4. If the normalling is not desired the jumpers have to be removed. In addition the sum of all four outputs is available (bottom left socket with the sum sign). Therefore unit #4 has only one control voltage input (only C1, no C2). If desired this socket can be jumpered as control voltage input 2. But then the sum signal is no longer available as a socket (only as an internal pin). For each VCA output a jumper is available that determines if the output signal of the corresponding VCA is added to the sum signal. From the factory all four jumpers are set (i.e. all four VCA output signals are added). By removing of one or more of the jumpers one can choose which VCA output is added to the sum. The jumpers can be replaced by switches too.

Technical notes:

The control scale for each VCA is about 12dB/V (i.e. 1 V CV decrease corresponds to 12dB level decrease and 1 V CV increase corresponds to 12dB level increase). 0V CV corresponds to about -60dB (i.e. about attenuation by 1000). +5V CV corresponds to about 0dB (i.e. no attenuation or amplification = 1). The full attenuation/amplification range is about -90dB ... + 20dB. Attenuations below -60dB require a negative control voltage, amplifications beyond 0dB require a control voltage more than +5V. For the first CV input of each unit (CV1) an internal trimming potentiometer (attenuator) is available to adjust the control scale for other voltage ranges (e.g. 0...+8V for A-140 envelope control or 0...+10V for external 10V control voltages). To obtain another CV scale even for CV2 an attenuator (e.g. A-183-1) can be used. If an amplification offset is required (e.g. for zero-symmetrical control voltages like LFO) an external offset generator with attenuator/polarizer (e.g. A-183-2) is recommended.

The A-132-4 uses a circuit with four exponential VCAs (SSM2164/V2164). Unfortunately there is no easy way to obtain a linear scale for the VCAs (actually two exponential VCAs are required to obtain a linear VCA, that's how e.g. the A-132-1 and A-132-3 work).
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 1 in stock $92.09
Cat: 676692 Rel: 18 Jul 18
 
Octal VCA module containing four VCA pairs - 8HP
Notes: A-132-8 is an octal VCA and primarily planned for polyphonic applications. The module contains four VCA pairs. Each pair includes two daisy-chained VCAs. One VCA has a linear control scale, for the second VCA linear or exponential control scale can be chosen by means of jumpers. We decided to provide two VCAs for each voice because usually one VCA is required for loudness envelope and a second one for velocity (or other functions like individual voltage-controlled loudness of each voice, amplitude modulation and so on).

These controls and in/outputs are available:

- Default Gain 1 (GL)
- Default Gain 2 (GX)
- CV Input VCA 1
- CV Input VCA 2
- Audio Input
- Audio Output

In addition, an Audio Sum Output is also available.

The module features two Default Gain controls (GL, GX), that enable the opening of the first VCAs (L) and/or second VCAs (X). For this the controls GL and GX generate two internal control voltages 0...+10V which are connected to the switching contacts of the sockets 1L...4L (control GL) and 1X...4X (control GX). As long as no patch cable is inserted into the socket in question the internal default control voltage (GL or GX) is used to control the corresponding VCA. This is necessary when the VCA in question is not in use (i.e. no external CV available). Otherwise the VCA would close and there would be no output signal even if the other VCA in the chain is open. The controls GL and GX are also useful for testing polyphonic patches (e.g. for tuning the VCOs).

In the factory the CV inputs are adjusted for a CV range 0...+10V - matching to the polyphonic ADSR module A-141-4. But the sensitivity of each CV input can be adjusted by means of a trimming potentiometer to adapt the CVs even to other control voltage ranges.
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 3 in stock $149.65
Cat: 710951 Rel: 29 Nov 18
 
Two voltage controllable amplifiers which can amplify positively or inverted - 8HP
Notes: A-133 is a special dual voltage controlled amplifier that enables both positive and negative amplifications. Negative amplification means in this context that the signal is inverted. The main application of the module is the processing of control voltages, e.g. ADSR or LFO but the module can be used also for audio applications (e.g. as a waveshaper, see patch examples below).

The amplification range is about -2.5....0....+2.5 (other amplification ranges for small additional charges, e.g. -1...+1 or -5...+5). Amplification can be adjusted manually (Man control) and by an external control voltage with attenuator (CV). The present amplification is displayed with two LEDs: one for positive and one for negative amplifications (not a signal display but amplification display, similar to A-134).
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 1 in stock $77.44
Cat: 671608 Rel: 29 Nov 17
 
Voltage controllable performance mixer module package
Notes: Series A-135-4 contains several modules which are used to built a voltage controlled performance mixer. The modules of the A-135-4 series can be combined with the (non voltage controlled) mixer modules A-138o/p.

A-135-4A:

A-135-4A is the main module. It is very similar to module A-138p, but with voltage control for all parameters (except gain). Also the front panels of A-135-4A and A-138p are very similar. The only difference are the additional LEDs which are used to display the magnitudes of all voltage controlled parameters. This is necessary because the positions of the manual controls do not necessarily correspond to the resulting parameter value because these are composed by both the manual controls and the applied external control voltages (via A-135-4B). Without LEDs one would be left in the dark in regard to the actual parameter value.

A-135-4A contains four high quality voltage controlled amplifiers (VCA) for each channel: one for the main level, two for panorama left/right and one for aux. The control scales for all parameters are linear. Altogether 16 VCAs are included in the module. High end linear VCAs manufactured by Curtis/USA are used (CEM3381). The 16 LEDs display roughly the amplification of the VCA in question.

Module A-138o is used as output module for the A-135-4A. A-135-4A and A-138p can be connected together to the same A-138o to obtain e.g. four fully voltage controlled channels (A-135-4A) and four manually controlled channels (A-138p).

A-135-4B:

This module is used to route the 16 external control voltage to the main module A-135-4A. These control voltages are available for each channel:

- Level (main loudness)
- Panorama
- Aux
- Mute

Each control voltage has an input socket and a polarizer control available (the polarizer function is described more detailed on the A-138c info page). That way it's possible to adjust the depth and polarity of the external control voltage which affects the parameter in question. If the same CV (e.g. LFO or ADSR) is used e.g. for two panorama control inputs the result may be the opposite if the polarizers are adjusted accordingly (i.e. one positive and the other negative). The external control voltage is added to the voltage that is generated by the manual control on the A-135-4A main module. The sum of both voltages is used to control the VCA in question and is displayed with the corresponding LED on the A-135-4A module. The picture on the left side below shows one channel of A-135-4A/B as block diagram.

The mute CV input works in principle in the same way as the level CV input but with reverse polarity and higher sensitivity (about factor -2). Typically, the mute polarizer control is adjusted fully CW. Then a (gate) voltage of ~ +2.5V or more fully mutes the channel in question. If the mute function is not used the mute CV input can be used as a second CV input for level (with twice the sensitivity and inverted polarity compared to the normal level CV input).

A-135-4A and A-135-4B are connected internally via a 20 pin ribbon cable. The cable can be longer so that the CV input module A-135-4B needs not to be mounted next to the main module A-135-4A (e.g. to the row above or below).

Modules A-135-4A and A-135-4B are available only as a module combo because the single operation of each module does not make sense!
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 1 in stock $366.29
Cat: 671600 Rel: 29 Nov 17
 
Output module for the Performance Mixer system - can be combined with one or more A-138p
Notes: Modules A-138p/o are used to build a simple performance mixer (instead of an external stand-alone mixer). Module A-138p is the 4-fold input module, A-138o is the output module that can be combined with one or more A-138p.

A-138o features:

- Level controls for Left, Right and Aux
- Output sockets for Left, Right and Aux (3.5 mm mono sockets)
- A-138o requires at least one A-138p (no stand-alone use)
- Application example for Aux Send and Aux Return: looping in another module for effects (e.g. DSP module A-187-1, BBD module A-188-1, Spring Reverb A-199)
- Application example for Aux Send only: pre-listening in combination with the headphone amplifier module A-139-2

- 3U Eurorack module, 4HP wide, 40mm deep
- Current draw: 20mA at +12V and 12V at -12V
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 3 in stock $55.46
Cat: 671589 Rel: 29 Nov 17
 
Four-channel stereo mixer - 8HP
Notes: A-138s is a simple but useful 4-in-2 mixing tool. It has four inputs available. Each input is equipped with an attenuator (Level) and a panning control that is used to distribute the signal to the left and right output. Beyond stereo mixing it is equally suited to create variable parallel routings. For example: Any of the four inputs may be routed in variable intensity to feed two filters.

You may regard the A-138s as a smaller version of the A-138m Matrix Mixer.

Inputs and outputs are DC coupled, i.e. the module can be used for the mixing of control signals too.

- 3U Eurorack module, 8 HP wide, 30 mm in depth
- Power consumption: 10 mA at +12 V and 10 mA at -12 V
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 3 in stock $68.02
Cat: 684443 Rel: 30 Apr 18
 
Four-channel stereo mixer - 8HP
Notes: A-138s is a simple but useful 4-in-2 mixing tool. It has four inputs available. Each input is equipped with an attenuator (Level) and a panning control that is used to distribute the signal to the left and right output. Beyond stereo mixing it is equally suited to create variable parallel routings. For example: Any of the four inputs may be routed in variable intensity to feed two filters.

You may regard the A-138s as a smaller version of the A-138m Matrix Mixer.

Inputs and outputs are DC coupled, i.e. the module can be used for the mixing of control signals too.

- 3U Eurorack module, 8 HP wide, 30 mm in depth
- Power consumption: 10 mA at +12 V and 10 mA at -12 V
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 2 in stock $78.48
Cat: 577754 Rel: 29 Nov 17
 
Envelope generator with CV outputs for modulation - 8HP
Notes: Module A-140 is an envelope generator, and, since it puts out control voltages, counts as one of the modulation devices in a modular system. As soon as the gate input receives sufficient voltage, the ADSR generates a variable voltage, changing in time, called an envelope. This varying voltage is output in normal (positive) and inverted form, and can be used, eg. for voltage controlled modulation of a VCO, VCF, or VCA, or for processing other modules' inputs and outputs.

The shape of the envelope is governed by four parameters: Attack, Decay, Sustain and Release.

The envelope is started (triggered) by a gate signal either from the INT.GATE voltage on the system bus, or, if a signal is put into it, from the gate input socket.

The envelope can also be re-triggered, i.e. start from scratch again, each time a trigger signal is sensed at the Retrig. input socket, when the gate is still open.

Module A-140 has available a three-position toggle switch to select one of three time ranges. The envelope duration ranges from about 50us (microseconds) up to several minutes.

In combination with the Comparator module A-167 a free-running "ADSR-LFO" can be realized.
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 1 in stock $71.16
Cat: 684450 Rel: 18 Jul 18
 
Dual ADSR envelope generator - 8HP
Notes: Module A-140-2 contains two ADSR type envelope generators behind a front panel with 8 HP only.

Each ADSR provides these controls and in/outputs:

- LED (displays the envelope output)
- A: manual Attack control
- D: manual Decay control
- S: manual Sustain control
- R: manual Release control
- Gate Input
- Retrigger Input
- CVT Input with attenuator (CVT = CV Time)
- Envelope Output 1
- Envelope Output 2

The output voltage range for each envelope is 0 - 10V. The time range of Attack/Decay/Release is about 1ms to 30s.

By means of internal jumpers one can select which time parameters are controlled by the CVT input (e.g. D only or D+R or A+D+R) and in which direction (i.e. if an increasing CVT shortens or stretches the time parameter in question).

Socket CVT can be normalled to an internal fixed voltage (i.e. the switching contact is connected to an internal fixed voltage). That way it's possible to change all time parameters simultaneously by means of the CVT control.

Another jumper is used to set output 2 to normal or inverted envelope.

And another jumper is used for the normalling of Gate 2 to Gate 1 (i.e. ADSR#2 is also triggered by Gate 1).

Two more jumpers are used for the optional bus access to the gate signal of the bus for each ADSR. Changing the positions of the mentioned jumpers allows to modify the factory settings.
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 5 in stock $129.77
Cat: 676693 Rel: 18 Jul 18
 
Quad voltage controlled envelope generator - 8HP
Notes: A-141-4 is a quad voltage controlled Envelope generator and is primarily planned for polyphonic applications. The module contains four ADSR type voltage controlled envelope generators with common manual controls and CV inputs with polarizers for the all parameters Attack (A), Decay (D), Sustain (S) and Release (R). Each of the four envelope generators has available a gate input, a control LED and an envelope output.

The module has these controls and in/outputs are available:

- Attack (manual control)
- Decay (manual control)
- Sustain (manual control)
- Release (manual control)
- CVA control (polarizer for Attack CV input)
- CVD control (polarizer for Decay CV input)
- CVS control (polarizer for Sustain CV input)
- CVR control (polarizer for Release CV input)
- CVA socket (Attack CV input)
- CVD socket (Decay CV input)
- CVS socket (Sustain CV input)
- CVR socket (Release CV input)
- Gate inputs 1 - 4
- Envelope outputs 1 - 4
- LED displays 1- 4 (envelope display)

The output voltage range for each envelope is 0 - 10V.
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 5 in stock $148.60
Cat: 684451 Rel: 28 Aug 18
 
Dual envelope controlled VCA - 8HP
Notes: Module A-142-2 contains two envelope-controlled VCAs behind a front panel with 8 HP only. Each of the two sub-units is the combination of a simple AD/ADSR/AR envelope generator and a VCA. The type of envelope can be selected by means of a toggle switch:

- AD: Attack-Decay
- AR: Attack-Release
- ADSR: Attack-Decay-Sustain-Release with the limitation that Decay Time = Release Time and fixed Sustain level (factory setting 50%)

Each sub-unit provides these controls and in/outputs:

- LED control (envelope display)
- Attack (A), manual control
- Decay/Release (D/R), manual control
- Mode switch (AD, AR, ADSR)
- Audio level control (small control without knob)
- CVT Input (CVT = CV Time)
- CV Ducking input
- Attenuator for CVT (small control without knob)
- Gate Input
- Manual Gate (momentary switch)
- Audio Input
- Audio Output

The Envelope Output of version 1 has been cancelled for the benefit of the new CV Duck input. But there is an internal pin header available that has available the envelope signal (0...+10V) and the CV input of the VCA (0...+10V). Ex works the pins are shortened by a jumper but can be used for modifications (envelope output, VCA CV input).

By means of two internal jumpers for each sub-unit one can select which parameter(s) are controlled by the CVT input (e.g. D+R only or A only or A+D+R) and in which direction (i.e. if an increasing CVT shortens or stretches the time parameter in question). Two more jumpers are used for the optional bus access to the gate signal of the bus for each envelope.

CV Duck is an additional control input for the VCA that can be used to mute the VCA by means of an external control voltage. Beyond about +5V CV Duck the VCA is fully muted, in the range 0...+5V there is only a partial muting. Circuitry-wise the CV Duck signal is amplified by two, inverted and added to the internal envelope signal (0...+10V). The sum of both signals is used to control the VCA.

The time range of Attack/Decay/Release is about 1ms to 30s (can be modified by changing the value of a capacitor).

Applications:

Virtually in each patch one or more envelope/VCA combos together with a sound source are very useful, mainly for percussive sounds. Voltage control of the times and the ducking animates each performance.
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 1 in stock $140.23
Cat: 671585 Rel: 29 Nov 17
 
Module consisting of voltage-controlled low frequency oscillator (LFO) & voltage controlled amplifier (VCA) - 8HP
Notes: Module A-147-2 is the successor of the VCLFO A-147 but offers much more features than the predecessor. The module is made of these sub-units:

- VCLFO: voltage controlled low frequency oscillator
- VCA: voltage controlled amplifier, switchable to voltage controlled polarizer
- VC delay unit: voltage controlled linear attack envelope (only one parameter: attack) for delayed LFO operation in combination with the VCA (e.g. delayed vibrato/tremolo)

LFO: The voltage controlled LFO has the waveforms Triangle, Sine, Sawtooth and Rectangle available and features a Reset/Sync input. Triangle/Sine and Rectangle are displayed by means of dual-colour LEDs (probably red/green), Sawtooth has a unicolor LED available (probably blue). The output levels are about -4V...+4V for Triangle, Sine and Rectangle. The Sawtooth level is about 0...+8V.

The CV control can be switched to attenuator or polarizer ("CV Mode" switch). In polarizer mode the CV inputs affects the frequency in the reverse manner when the CV control is left from the centre position. In the centre position CV has no effect and right from the centre the control works like a normal attenuator. The frequency range (without external CV) is from about 0,005 Hz (i.e. about 3 minutes per period) to 200 Hz (with external CV max. frequency about 1kHz). In addition a ultra-low mode can be activated by means of an internal jumper. When the ultra-low jumper is set a fixed voltage is connected to the switching contact of the "LFO CV" socket. In polarizer mode of the CV control that way extremely low frequencies (up to one hour period and more) are possible. For this a jumper has to be installed on the pin header JP6. In the factory a dummy jumper is installed on the pin header JP7 "Dummy". JP7 has no function and is used only for "parking" of the jumper. Simply remove the jumper from JP7 and plug it on JP6. JP6 is located behind the CV control.

VCA: This is a linear VCA that can be switched to "normal" VCA (i.e. kind of a voltage controlled attenuator) or voltage controlled polarizer ("VCA Mode" switch). In the "normal" VCA mode amplification +1 is achieved with about +5V control voltage. In polarizer mode the amplification ranges from about -0.5 (i.e. inverted signal with about 50% level) with 0V CV to +0.5 (i.e. non-inverted signal with about 50% level) with +5V CV. With about +2.5V CV the signal is suppressed. Details about the functioning of a voltage controlled polarizer can be found in the description of the module A-133. In this mode the VCA can be treated also a DC coupled ring modulator (similar to A-114).

The VCA of the A-147-2 has three sockets available: "In" (signal input), "Out" (signal output) and "CV" (control voltage input).

The Triangle Output of the LFO is normalled to the VCA signal input by means of the switching contact of the "VCA In" socket. If another LFO waveform (or any other signal) should be processed by the VCA the corresponding signal has to be patched to the "VCA In" socket. The VCA can be used also independently from the LFO and the Delay CV. In this case the VCA sockets In, Out and CV have to be patched accordingly. The VCA can be used also as waveshaper for the LFO signals (e.g. by patching VCA In and VCA CV to different LFO signals, if necessary via attenuator A-183-1 or offset generator/attenuator A-183-2).

Attack/Delay: The third sub-unit of the module is a simple, voltage controlled envelope generator that has only the parameter "Delay" (or Attack) available. This unit generates a linear increasing voltage that starts from 0V after each Delay Reset until it reaches about +5V. Then the voltage remains at +5V until the next Delay Reset occurs. The inclination or gradient is controlled by the manual Delay control and the Delay control voltage ("Delay CV" input). The waveform is linear, the control scale is exponential. The output voltage is displayed by a green LED and available at the "Delay Out" socket.

The manual Delay control ranges - without external "Delay CV" - from about 5ms (fully CW) up to 2 minutes (fully CCW). By means of an external voltage applied to the "Delay CV" socket this range can be extended. A rising CV shortens the delay time (behaviour like a VCO)!

The Delay output voltage ranges from about 0V to +5V. The rising edge of the gate, clock or trigger signal applied to the "Delay Reset" sockets resets the Delay output voltage to 0 V.

"Delay Out" is normalled to the VCA CV input by means of the switching contact of the "VCA CV" socket and consequently controls the Triangle level provided that no other patch is made. A typical example is the usage of a Gate signal (e.g. from a USB/Midi-to-CV/Gate interface) as Delay Reset. That way a delayed vibrato or tremolo can be realized if the VCA output is patched to the frequency CV input of a VCO (or VCF), or the CV input of a VCA.
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 3 in stock $117.21
Cat: 577745 Rel: 29 Nov 17
 
Two sample & hold units in one module for generating stepped random voltages or slicing signals
Notes: Module A-148 (Dual S&H) has two identical sample & hold modules, designed to produce 'staircase' voltages. The signal present at the sample input is sampled at a rate set by the signal at the trigger input, and held at that voltage at the S&H output.

The exact shape of the staircase depends on the sort of waveform at the sample input: NOISE or RANDOM signals produce random patterns; an LFO produces rising or falling staircase patterns.

Two LEDs for each S&H indicate the voltage (positive or negative) of the sampled signal.
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 1 in stock $60.69
Cat: 671556 Rel: 29 Nov 17
 
Octal VC/manual programmable switch - 12HP
Notes: Module A-150-8 contains eight manually/voltage controlled switches. Each of the eight switches has a manual control button (Man.), a control voltage input (CV), a common Out / Input (O/I), and two In / Outputs (I/O1, I/O2). The switches are bi-directional, i.e. they can work in both directions, so can connect one input to either of two outputs, or either of two inputs to one output. Two LEDs show which in / output is active (i.e. which is connected to the common out / input). In addition, the LEDs are used for the programming of the module:

For each unit the operating mode can be selected: Toggle or Level controlled. In Toggle mode the rising edge of the CV input or operating the manual control button changes the state of the switch. In Level mode the switch state is defined by the voltage applied to the CV input (low voltage = I/O1, high voltage = I/O2) or by the state of the manual control button (not pressed = I/O1, pressed = I/O2). The modes are programmed very easily: Operating the Toggle/Level button of the program section displays the current state of each switch with the LEDs: left LED on = Toggle mode, right LED on = Level mode. Operating the manual control button of the switch in question changes the toggle/level mode while the Toggle/Level button of the program section is operated. During the programming patched CV signals may have to be removed as the CV signals would interfere with the manual operating buttons during the programming process.

In addition, it's possible to define master/slave groups. In such a group the upper unit (= master) controls also the state of the following switches provided that they are defined as slaves. Master/slave programming is also very simple: Operating the Master/Slave button of the program section displays the current state of each switch with the LEDs: left LED on = Master, right LED on = Slave.

When all 8 units are defined as master all switches are independent from each other. If for example the sequence is MSSSMSMS the control unit of the first switch also controls the switches 2, 3 and 4. The control unit of switch 5 also controls the switch 6, and the control unit of switch 7 also controls the switch 8. The current states of the slave switches are overwritten by the state of the master switch.

Technical note: To protect the electronic switches in case of an unsuitable patch (e.g. connection of two outputs) a 1k protection resistor is inserted into the O/I line of each switch. If control voltages used for VCOs are switched this may cause a small voltage drop and lead to undesired audible detuning. For this application we recommend to insert a CV buffer between A-150-8 and the VCO(s), e.g. the Buffered Multiple A-180-3 or the Precision Adder A-185-2. Integrating the buffers into the module A-150-8 was not possible because this would ruin the bidirectionality of the switches.
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 2 in stock $145.46
Cat: 684460 Rel: 23 Apr 18
 
Two independent voltage controlled switches in one module - 4HP
Notes: Module A-150 (Dual VCS) contains two separate voltage-controlled switches.

Each switch has a control voltage input, a common Out / Input, and two In / Outputs. The switches are bi-directional: they can work in both directions, so can connect one input to either of two outputs, or either of two inputs to one output. Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module.

Two LEDs show which in / output is active (i.e. which is connected to the common out / input).
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 1 in stock $69.07
Cat: 684462 Rel: 22 May 18
 
Electronic switch with up to four steps - 4HP
Notes: Module A-151 (Quad Sequential Switch) is like an electronic four-position rotary switch.

It includes trigger and reset inputs, four in/outputs, and a common out/input. Each time a pulse is received at the trigger input socket, the common out/input is connected to the next in/output. After the fourth in/output, the next trigger makes it step back to the first again, and so on. A positive pulse at the reset input switches the out/input immediately back to the first in/output. Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module.

Four LED's indicate the active in/output (ie. the one that is connected to the out/input at any particular time).
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 7 in stock $58.60
Cat: 671601 Rel: 29 Nov 17
 
Analog sequencer for CVs & trigger/gates
Notes: The Doepfer A-155 has two CV rows, each with selectable voltage range, glide and sample & hold options. 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 A-155's functions can be expanded by the A-154 Sequencer Controller, as it's an entire control unit with step number limitation, voltage controllable clock generator, variable gate length and a number of playback modes.

Features of the analog rows (knobs):

- 8 potentiometers (knobs)
- Lower row: Scale (knob), voltage output range 0 ... ~ +6,5V
- Upper row: 1V/2V/4V (octave range switch for exact VCO control), voltage output ranges 0 ...1.0V / 0 ...2.0V / 0 ...4.0V
- Glide time (knob), same as portamento or slew limiter
- Glide Control (control input for switching glide on/off)
- S&H Control (control input for internal S&H, works like A-148)
- Pre Glide/S&H-Out (analog output before S&H and glide unit, especially required when external audio signals are used as inputs of the lower row)
- Post Glide/S&H-Out (analog output after S&H and glide unit)
- Lower row: external inputs for the 8 steps (switched jack sockets), control signals or audio signals may be used as inputs (allowed voltage range -5V...+12V), the knobs of the lower row are working in this case as attenuators

Features of the trigger rows (switches):

- 4 Trigger/Gate tracks with 2 rows of switches
- Toggle switches of 1-0-1 type (with middle position), which can be used to send a trigger/gate to the track above or below or to send no trigger/gate (middle position)
- 3 trigger rows (i.e. short pulse for each step set, pulse width corresponds to the pulse width of the clock/step input signal)
- 1 gate row (i.e. a high signal is applied during the length of the step set)

Control inputs and buttons:

- Step (defines the tempo of the sequence, same as clock or trigger input)
- Reset (resets all rows to step 1)
- Start (starts the sequence at the momentary position)
- Stop (stops the sequence at the momentary position)

Step and Reset are compatible to the MIDI interface A-190, i.e. in combination with the A-190 the A-155 may be synchronized via MIDI. The quantizing module A-156 can be used to quantize the infinite analog voltages coming from A-155 into discrete semitone steps (multiples of 1/12V). Without MIDI interface e.g. a LFO rectangle output can be used to define the tempo of the sequence.

The sequencer controller A-154 adds a lot of new functions to the A-155 (e.g. voltage controlled addressing, forward/backward/pendulum/random mode, voltage control of first and last step, voltage controlled clock and gate length, step skipping, combination of several A-155 in parallel/serial mode and many more).
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 2 in stock $281.52
Cat: 671576 Rel: 29 Nov 17
 
Enhanced clock divider with multiple dividing factors - 4HP
Notes: Module A-160-2 is an enhanced version of the standard clock divider A-160. The module is a frequency divider for clock/trigger/gate signals, designed to be a source of lower frequencies, particularly for rhythm uses. The Clock input will take any digital signal from, eg. LFO, MIDI sync, or the gate from a MIDI-CV interface. At the outputs, you have access to three sets of seven different sub-divided clock signals, from half the clock frequency down to 1/128. The low/high levels of the output signals are 0V and about +10V.

The A-160-2 also has a reset input. Whenever a reset signal is sensed, all outputs are set to certain levels which depend upon the selected mode.

These are the most important features of the module:

Three different sets of dividing factors, selected by a three-position switch at the front panel:
- Power of two: 2, 4, 8, 16, 32, 64, 128
- Prime numbers: 2, 3, 5, 7, 11, 13, 17
- Integer: 2, 3, 4, 5, 6, 7, 8

Two output modes, selected by a two-position switch at the front panel:
- Gate mode: outputs act like the outputs of typical binary dividers
- Trigger mode: in this mode the outputs are AND-wired with the clock signal (i.e. the clock pulsewidth affects the pulsewidth of the outputs)
- Clock edge type selected by a jumper on the pc board:
- Positive: the rising edge of the clock signal triggers the state change of the outputs
- Negative: the falling edge of the clock signal triggers the state change of the outputs

Reset behaviour by two jumpers on the pc board:
- Level triggered: the level at the Reset input triggers the Reset
- Edge triggered: the edge of the signal at the Reset input triggers the Reset
- Positive: a high level (> 2.5V) or the rising edge at the Reset input triggers the Reset
- Negative: a low level (< 1 V) or the falling edge at the Reset input triggers the Reset

Output polarity selected by a jumper on the pc board:
- Positive: non-inverted outputs
- Negative: all seven outputs are inverted

Width: 4HP / 20mm
Depth: 35mm (Measured from the rear side of the front panel)
Current: +12V: +50mA, -12V: -0mA
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 2 in stock $92.09
Cat: 671598 Rel: 29 Nov 17
 
Monophonic MIDI/USB interface Eurorack module with outputs for gate, clock, reset & two outputs for CV's
Notes: A-190-4 is the replacement for module A-190-1 which is no longer available. The functions of A-190-1 and A-190-4 are nearly the same (Midi In, Midi Out, CV1, CV2, Gate, Clock, Reset). But the operation of the A-190-4 has been improved because a 3-digit LED display is available. The current values of all parameters (like Midi channel, reference note, clock divider) can be read back and modified by means of up/down buttons. In addition, A-190-4 is equipped with an USB interface and the external +5V supply is no longer available. Consequently, the additional charges for the 5V adapter fall away.

The module width is the same for A-190-1 and A-190-4. In the A-100 basic systems the A-190-1 will be replaced by the A-190-4 from about May 2014.

Important notes:

- The Scale (SCA) and Tune (TUn) parameters remain unchanged when the module is initialized! Otherwise the initialization would overwrite the adjusted values. Because of the tolerances of electrical parts there are no fixed values for SCA and TUn which are valid for all modules. The values for SCA and TUn differ a bit from module to module because of the tolerances of electrical parts. In case that the module has been adjusted totally wrong: typical values are 100 for SCA (coarse) and 55 for TUn (coarse).

- The module comes with installed bus jumpers for CV and Gate. One has to remove the jumpers if e.g. an A-164, A-190-1, A-190-2, A-190-3, A-185-1 or A-185-2 is already connected to the CV and/or gate lines of the same bus board! If the A-190-3 should be used as CV and gate source for the A-100 bus the CV and gate connections of other CV/gate sources to the A-100 bus have to be removed. Otherwise short circuits are made between the outputs of the CV or gate transmitters!

- The gate level of the A-190-3 can be changed from +5V to +12V. For this the jumper on JP10A (behind the CV Note socket, labelled "GATE 5V JP10A") has to be removed and installed to JP10B (behind the 16 pin bus connector, labelled "GATE 12V JP10B").

- The module is a USB device or slave in USB mode. It has no USB host function (like computers or laptops with type A USB connectors).
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 1 in stock $167.44
Cat: 577766 Rel: 15 Aug 18
 
Analogue noise & random module - 8HP
Notes: Module A-118 is a noise and random voltage generator. It produces three types of signal: white noise, coloured noise, and random voltage.

White and coloured noise can be used as audio sources, and also, in conjunction with a sample & hold module, as control voltages, and the random voltage is a useful source of voltage control, especially for its low frequency content.

The A-118 gives you the ability to mix the relative amounts of Red (low frequency component) and Blue noise (high frequency component) in the coloured noise output.

There are knobs to control the rate of change and amplitude of the random voltage, and two LEDs indicate the state of the voltage at any one time.
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 3 in stock $63.83
Cat: 703564 Rel: 08 Oct 18
 
Analogue noise/random with black faceplate & custom knobs - 8HP
Notes: Module A-118 is (as you might have guessed) a noise and random voltage generator. It produces three types of signal: white noise, coloured noise, and random voltage. The noise signal is generated 100% analogue by amplification of the noise of a transistor. White and coloured noise can be used as audio sources, and also, in conjunction with a sample & hold module, as control voltages, and the random voltage is a useful source of voltage control, especially for its low frequency content.

The A-118 gives you the ability to mix the relative amounts of Red (low frequency component) and Blue noise (high frequency component) in the coloured noise output.

There are knobs to control the rate of change and amplitude of the random voltage, and two LEDs indicate the state of the voltage at any one time.
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 1 in stock $78.48
Cat: 577771 Rel: 29 Nov 17
 
Envelope follower & pre-amplifier for microphone/line-signals - 8HP
Notes: Module A-119 (External Input / Envelope Follower) is designed to allow external audio signals to be integrated into the System A-100. It comprises a pre-amp, envelope follower, and comparator.

The pre-amp has two inputs: an unbalanced input for line level signals, with a gain factor of from 0 to 20, and a balanced input with a gain factor of from 0 to 500, for insertion of low level signals, for instance from a microphone or electric guitar.

The Envelope Follower reads the signal level of the input, and puts out a proportional voltage as an envelope at its own output.

The comparator generates a gate signal whenever the input goes above an adjustable trigger threshold.

Three LED's help you keep track of overload, the envelope, and the gate signal.
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 6 in stock $63.83
Cat: 577743 Rel: 29 Nov 17
 
12dB multimode filter module - 8HP
Notes: Module A-124 is a special 12dB multimode filter using the "strange" filter circuit of the "EDP Wasp" (an analog synthesizer with black/yellow case built end of the seventies, manufactured by the UK company "Electronic Dream Plant").

This design "abuses" digital inverters as analog operational amplifiers leading to distortions and other "dirty" effects that generate the specific sound of this filter.

The filter is equipped with a band pass output and a combined low/notch/high pass output. For this output a control knob defines the relation between low and high pass signal.

If both signals appear at the same level (i.e. middle position of the Mix knob) one obtains a notch filter. Otherwise the low or high pass signal predominates.

The module does not feature self oscillation in contrast to most of the other filters of the A-100 system.
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 3 in stock $78.48
Cat: 676696 Rel: 01 Feb 18
 
Four-fold envelope follower with adjustable attack & release time for each channel
Notes: The A-135-4C is composed of four envelope followers with adjustable attack and release. The circuit was designed to be used as an addition for the A-135-4A/B Performance Mixer, adding ducking, compressor and expander functions to the mixing system. However, thanks to a full set of inputs and outputs, it is also possible to employ the A-135-4C for other tasks.

The A-135-4C offers four identical envelope followers. Each modulator comes equipped with an audio input, attack and release potentiometers as well as a CV output. LED's visualize control voltages generated by the module. The A-135-4C can be connected to the A-135-4A/B Performance Mixer via a Ribbon cable. Users are able to determine whether audio material gets tapped off directly after the input connectors, behind the gain stages or after the level control of the A-135-4A. By plugging in patch cables into the envelope follower's inputs, the internal routing can be suspended.
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 1 in stock $111.97
Cat: 577776 Rel: 29 Nov 17
 
Four channel mixer module - 8HP
Notes: Module A-138 is a four channel mixer, which can be used with either control voltages or audio signals. Each of the four inputs has an attenuator, and there's a master attenuator, so that the mixer can be used at the end of the audio chain, i.e. it can be used to interface directly with an external mixer, amplifier, etc.

The A-138b has potentiometers with logarithmic response, so is especially suitable for audio signal mixing.
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 4 in stock $55.46
Cat: 671593 Rel: 29 Nov 17
 
Performance Mixer system input module featuring four identical input channels - 16HP
Notes: Modules A-138p/o are used to built a simple performance mixer (instead of an external stand-alone mixer). Module A-138p is the 4-fold input module, A-138o is the output module that can be combined with one or more A-138p.

A-138p features:

- 4 channels
- Controls and inputs for each channel
- Input (3.5 mm mono socket)
- Signal LED (as a coarse monitor of the incoming level, the level is measured after the gain control)
- Mute switch
- Gain (control to adapt different audio levels)
- Level (the main volume control)
- Aux
- Pan
- Internal jumper for each channel to choose between Aux pre/post main Level control
- Internal connection to the output module and to other A-138p modules

Doepfer A-138p requires A-138o (no stand-alone use).
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 2 in stock $117.21
Cat: 577748 Rel: 15 Aug 18
 
Reverb effects module with spring reverb tank - 8HP
Notes: Module A-199 is a spring reverb module. The reverb effect is electronically simulated by means of 3 spiral springs. Spring reverb systems have a very characteristic sound that is based on the (insufficient) mechanical properties of the springs like signal delays, audio resonances, limited frequency range, acoustic feedback behaviour, sensitivity to mechanical shocks and others.

The 3-spring system used in the A-199 ensures a "dense" reverb because of the different properties of the three springs.

The A-199 implies some special features that are not self-evident for spring reverb units:

The reverb signal can be fed back to the input using the Feedback control. Even self-oscillation of the springs similar to the self-oscillation of filters is available. The feedback loop can lead even via external modules like VCA, VCF, phaser, frequency shifter, vocoder, distortion/waveshaper, ring modulator and others. In this case the reverb output of the A-199 is connected to the input of the external module(s) and the output of the external module(s) is fed back to the Ext. Feedback In socket of the A-199. This socket contains a switch that interrupts the internal feedback loop as soon as a plug is inserted.

Another feature is the Emphasis control. This enables the adjustment of the accentuation of middle frequencies (around ~ 2kHz).

With the Mix control the relation between original and reverb signal appearing at the mix output is adjusted.

Using all these features very extreme and unusual effects can be generated with the A-199.
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 5 in stock $110.93
Cat: 698465 Rel: 15 Aug 18
 
Reverb effects module with spring reverb tank - 8HP
Notes: Module A-199 is a spring reverb module. The reverb effect is electronically simulated by means of 3 spiral springs. Spring reverb systems have a very characteristic sound that is based on the (insufficient) mechanical properties of the springs like signal delays, audio resonances, limited frequency range, acoustic feedback behaviour, sensitivity to mechanical shocks and others.

The 3-spring system used in the A-199 ensures a "dense" reverb because of the different properties of the three springs.

The A-199 implies some special features that are not self-evident for spring reverb units:

The reverb signal can be fed back to the input using the Feedback control. Even self-oscillation of the springs similar to the self-oscillation of filters is available. The feedback loop can lead even via external modules like VCA, VCF, phaser, frequency shifter, vocoder, distortion/waveshaper, ring modulator and others. In this case the reverb output of the A-199 is connected to the input of the external module(s) and the output of the external module(s) is fed back to the Ext. Feedback In socket of the A-199. This socket contains a switch that interrupts the internal feedback loop as soon as a plug is inserted.

Another feature is the Emphasis control. This enables the adjustment of the accentuation of middle frequencies (around ~ 2kHz).

With the Mix control the relation between original and reverb signal appearing at the mix output is adjusted.

Using all these features very extreme and unusual effects can be generated with the A-199.
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 1 in stock $129.77
Cat: 695534 Rel: 03 Sep 18
 
All-analog multi-effects processor - MKII version
Notes: Elektron proudly presents the Analog Heat MKII, a versatile and powerful stereo analog sound processing unit. It does not make any sound on its own but does an excellent job enhancing any sound source you plug into it. The eight analog stereo effects circuits, the multimode filter, and the two-band EQ provide a wealth of sound shaping options. Upgrades from the MKI version include tougher and more precise encoders, back-lit buttons and a larger, sharper OLED screen. Great for stage, great in the studio, it even works as a 2-in/2-out sound card, for the on-the-go music producer.

Eight Effects:
The eight stereo analog circuits are designed to quickly access varied and powerful sound shaping. Each circuit has a distinctive way of processing sound. Clean boost, tape-like saturation, tube amp-like enhancement, overdrive, crunch, distortion, harmonic fuzz or high gain? You'll find your favourite flavour with ease.

Filter, EQ, Modulation:
Right next to the effects dial there's a stereo analog multimode filter and a two-band stereo analog EQ, hands-on and accessible. Modulation sources include a custom envelope and an LFO, each with a host of possible destinations. The intuitive controls and the ample modulation options make precise sound processing a breeze. Combined use of filter and envelope lets you heat up just the frequency range you want, at just the amplitude threshold you want.

Brighter and Better:
The MKII version of the Analog Heat features improved durability and precision encoders, new tough back-lit keys and a crisp OLED screen. The display is bigger, sharper and brighter: perfect for performing in the dark. There is also additional visual feedback on the Amp, Filter, Envelope and LFO pages that makes overview and understanding of sound processing and modulation a whole lot easier.
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 9 in stock $635.28
Cat: 682565 Rel: 11 Oct 18
 
10HP Eurorack filter module
Notes: The Polivoks Filter module, from Elta Music, utilizes the classic Soviet filter chip for a unique and iconic filter tone, and brings it to the Eurorack modular format. It provides two CV inputs with individual depth pots for ultimate control over cut-off frequency. One input with sensitivity control and four outputs available simultaneously, lowpass, bandpass, high-pass, and notch filter types.
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 2 in stock $136.05
Cat: 673533 Rel: 02 Jan 18
 
4 HP auto-tuner module
Notes: You can't tune two VCOs to note A in less than a minute? You need the Autopilot! Simply connect oscillators and a pitch CV source, press the module's button and wait for a few seconds. It doesn't get any easier than this.

The Autopilot features two identical tuners for precisely calibrating oscillators to note A.

The procedure:

- Connect the Drop Out socket of the tuner to the 1v / octave input of the VCO.
- Patch the VCO's waveform output to the Tune In connector of the tuner.
- Connect a sequencer or keyboard to the tuner's Key In socket.
- Press the tuner's button and wait a few seconds.
- Done

With a long press on both tuner buttons, the reference pitch can be shifted from 440 Hz to 432 Hz.
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 2 in stock $109.89
Cat: 688859 Rel: 10 Sep 18
 
Modular drum synthesiser with seven voices 30 HP
Notes: It's black, it's loud, it's dark.

BLCK_Noir is an amazing 30 HP modular drum synth with a very flexible sound-engine inspired by the Roland CR-78 CompuRhythm. Unlike other modules from Endorphin.es, this one is black, thus the name: Blck_Noir.

It includes seven drum voices: bass drum, snare, tambourine, closed and open hi-hat, cymbal and metal beat. It uses hybrid sound generation: digital noise with spectrum animation, injected into analogue circuits. The analogue generation part is fully discrete, using inductor coils instead of op-amps, giving a raw and powerful sound. Thanks to this special design Black_Noir will sound good in every setting.

Several CV inputs will let you control various parameters for lively drum sounds.

On top of that, the module has an on-board effect processor with eight effects: hall, shimmer, room, plate, spring reverb types, tap and tape delay types as well as a new freezer effect with additional auxiliary input and firmware update over audio.

With this module you will be able to create drums that have character! It will fit all styles of music, from Darkwave to Techno.
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 6 in stock $462.59
Cat: 579172 Rel: 07 Aug 15
 
Dual voltage controlled oscillator (VCO) synth module - 30HP wide
Notes: The Furthrrrr Generator has a main oscillator (carrier) with an extensive and fully voltage controllable wave mulitplier and a modulation oscillator (modulator) that can crossmodulate the carrier. Each oscillator has hard and soft sync and also featrues an integrated tuner: if both LEDs are lit the VCO is at note A. Left LED is lit at note Ab and right LED at A#. Frequency potentiometers are ten-turn models and thus allow for eeazy tuning. Frequency range of the VCOs is 10Hz-10kHz (and much lower in modulator's LFO mode). Both VCOs feature 2 frequency CV inputs (1x with bipolar attenuator, 1x with 1V/octave), one FM input (jumper selectable between linear and exponantial FM) as well as separate input for hard and soft sync. The voltage characteristic can be selected between 1V/octave and 1.2V/octave (Buchla norm).

The main oscillator (carrier) outputs the waveforms sine, saw, square and white noise. The two outputs marked with the magic eye are outputs of the "harmonic section" that generates very complex sounds by the wave multipier and it's parameters symmetry, order and furthrrr in the module's right hand section. Symmetry lowers the level of even harmonics and amplifies the odd harmonics (this affects the pulse wave's width as well). Order adds saturation to the high order harmonics and resembles a low pass filter. Furthrrrr alters the level of harmonics set by the other parameters and produces very interesting, partly brute sounds with lots of harmonics by clipping and folding the wave. All three parameters can be voltage controlled. The carrier oscillator also has inputs for hard and soft sync, the sync-switch can synch directly to the modulator.

The modulation oscillator (modulator) has three wave forms with direct outputs: sine, saw and square. Using the internal modulation via the "mood section" the waveform is selected with a button; an additional staircase wave form is available here but it can be overridden by inserting a signal into the external input socket. A switch activates the LFO mode.

The Mood section is responisble for the internal modulation of the carrier by the modulator. Switches determine the modulation destination(s) that can be activated simultaneously. These are the furthrrrr parameter of the harmonic section, the amplitude and the frequency of the carrier oscillator. The "balanced" switch acitvates theringmodulation between both VCOs. intnesity of modulation is controlled by the "mood index" potentiometer and the according CV input with bipolar attenuator.
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 2 in stock $580.85
Cat: 638010 Rel: 30 Jan 17
 
Digital multi-purpose module with dual voltage controlled AD/AR/looping envelope & dual gates
Notes: 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!
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 1 in stock $574.57
Cat: 712224 Rel: 30 Jan 17
 
B-STOCK: Box opened, product in perfect working order
Notes: ***B-STOCK: Box opened, product in perfect working order***


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!
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 1 in stock $551.49
Cat: 617810 Rel: 30 Jun 16
 
USB to MIDI to CV converter synth module - 12HP wide
Notes: - 12 HP width, up to 1 1/3" in depth

- USB-to-MIDI-to-CV converter module with 16 arbitrary assignable channels

- Simultaneous USB on-the-go device and host modes using 120 MHz ARM Cortex-M3 CPU

- Internal PSU capable of working from cigarette lighter receptacle, rechargeable battery or 12-20V AC-DC power adapter to power up the full Endorphines Shuttle system

- No drivers required for a direct connection to your MAC/PC or iOS devices

- Up to 8 voices of polyphony, polyphonic key aftertouch, no steps in CC voltages, MIDI clock, Tap Clock, Tap LFO, bi-directional USB-MIDI transfer and many more MIDI events can be translated into CV

- Edit your presets with web MIDI editor on the go in a web-browser

- Easy firmware update via USB on PC/MAC
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 1 in stock $408.16
Cat: 617811 Rel: 30 Jun 16
 
MIDI merger synth module for merging MIDI and USB-MIDI streams into one MIDI/USB MIDI flow - 6HP wide
Notes: - 6 HP width, up to 1 1/3" in depth

- Merge MIDI and USB-MIDI streams into one MIDI/USB MIDI flow

- Perfect mate for Shuttle Control to be able to connect a few MIDI devices into Shuttles "to host" input (e.g., merge drum machine's MIDI clock while playing with your MIDI controller)

- No bus power required - device runs fully on power delivered from USB socket, however it also may be powered from the bus board
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 2 in stock $109.89
Cat: 553603 Rel: 19 Nov 14
 
Quad multimode filter synth module
Notes: In our project Orage Magnetique to recreate a sound spaciolab to recreate sounds from space , this quad multimode filter has been designed to simulate the action of magnetic fluctuations on the sound landscape. The effecs of ionisation variations are modified by the different filters cutoff frequencies and the way they are synced. The module Fluctuations magnetiques (magnetic fluctuation) is a module from the modular synthesizer Orage Magnetique. This quad mutimode filter combines 4 independent multi-mode filters with selectable low-pass, band-pass & hi-pass. Each filter can be synced to one another to build to a 48dB low-pass/hi-pass filter or 24dB band-pass. Each filter has an modulation input and an individual output to create stereo effects a well as quadriphonic textures. The filters A & B and C & D can be used in parallel mode or serial mode.
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 1 in stock $192.57
Cat: 553606 Rel: 19 Nov 14
 
Voltage controlled amplifier synth module
Notes: GERMANIA 241 is a germanium transistor voltage controlled amplifier simulating the crossing of the belt of asteroids Germania 241. The germanium transistor will add this particular distorted sound made by the speed of asteroids.

Germanium transistors stocks are limited and may have different origins. Note that this module is a limited edition and that the sound can differ from one module to to another.

signal 0>10: input level
gain 0>10: minimum output level
mod2: amount of gain modulation of mod2 input
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 1 in stock $122.45
Cat: 690930 Rel: 14 Jun 18
 
Versatile Eurorack sequencing module - 10HP
Notes: Erica Synths 8 channel Sequential Switch is a unique module that allows you to sequence up to eight sound sources in advanced ways or route one sound source sequentially to eight different sound modifiers - VCFs, waveshapers, VCAs, etc.

Erica Synths Sequential Switch (SS) has unique control interface that allows you to pause, skip and merge steps and set sequence length, but what really sets it apart from other sequential switches is Gate output - when used with ADSR and VCA, you get a really powerful sequencer with real time control over each sound source in the sequence. Use Sequential Switch with random clock source and you get a heart of insane random, self-generating patches!
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 1 in stock $139.19
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