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Cat: 673868 Rel: 12 Jan 18
 
Versatile audio mixer module - 6HP
Notes: Mixup is a versatile, expandable audio mixer for Eurorack format. It has eight inputs (6 on the front panel) and two outputs. Inputs 1 and 2 are single-channel mono inputs, each with its own mute switch and level control; Input 3 is a dual-channel stereo input with a shared mute and level control; and input 4 is an auxiliary unity-gain, non-mutable stereo input.

Using bus connectors on the back panel, you can chain multiple Mixups together in series, giving you the ability to mix together even more inputs, or to create sub-mixes for routing around larger systems.

Because Mixup is designed specifically for audio (and not for CV mixing), it uses AC-coupled circuitry (which reduces the potential for 'pops' when muting and unmuting audio), and it uses audio-grade, logarithmic attenuators for a smooth, even response across the entire volume range.
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 6 in stock $91.78
Cat: 577792 Rel: 06 Jun 19
 
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 (see Fig. 1). Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module.

Four LEDs indicate the active in / output (i.e. the on that is connected to the out / input at any particular time).
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 3 in stock $60.46
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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 4 in stock $95.02
Cat: 731949 Rel: 10 Jun 19
 
Quad low frequency oscillator - 4HP
Notes: Module A-145-4 is a simple quad LFO (Low Frequency Oscillator). Not a very "exciting" module, just a bread-and-butter device and a simple demon for work. Virtually in every modular system several LFOs are required for modulation purposes. The module contains four simple LFOs with the waveforms triangle and rectangle. A dual colour LED (red = positive / yellow = negative output voltage) indicates the triangle output of each LFO. The frequency range can be chosen for each LFO individually by means of a jumper between about 50 Hz ... 0.04 Hz (about 20 seconds, jumper removed) and about 2Hz ... 0.002 (about 8 minutes, jumper installed).

The module can be treated as a slimmed version of the quad LFO A-143-3 as it has similar features available. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is less than one third of the A-143-3. The module is primarily planned for applications where only limited space is available. The functional difference compared to the A-143-3 are the missing sawtooth outputs and frequency range switches.
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 1 in stock $77.74
Cat: 673008 Rel: 13 Dec 17
 
Compact three channel utility module for every patch - 6HP
Notes: The 321 includes the most useful functions we always need in every patch, to edit and combine dynamically the signals in use.

It is composed of three identical sections, the red, yellow and green, where each of those is capable of scaling any signal, from 0 up to 2 times (+6dB), flip its phase, and apply a DC offset, allowing to shift your audio or CV up or down.

In case no signals are connected to the section input, the offset may act as a CV source too.

The three sections are then summed together into two independent summing stages: the top right jack outputs the sum of all three sections, while the top left outputs the sum of the unconnected sections only (semi-normalled).

The 321 is entirely DC coupled, allowing the process of control voltages as well as audio signals.

In case CV's or audio signals are particularly hot, the two 6dB attenuators, one per each summing section might be helpful to reduce exactly by 50% the incoming signals.
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 2 in stock $90.70
Cat: 563563 Rel: 10 Mar 15
 
Buffered multiple synth module, 2HP wide
Notes: Dual 1 x 3 buffered mult (one audio or cv signal in with multiple buffered outputs).

The output of the first mult is normalled to the input of the second mult to create a 1×6 buffered mult
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 More than 10 in stock $69.65
2hp
Cat: 686008 Rel: 08 May 18
 
Gate-driven arpeggiator
Notes: Arp is a gate-driven arpeggiator with a multitude of chord types and playback modes. Voltage control over both root note and chord type allow for sequencing any combination of chords in any key imaginable.

With the rate of the arpeggio and reset capability in your own hands, you're free to create dynamic rhythmic melodies from your favourite chords. Take your tonality for a ride with Arp.
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 3 in stock $96.10
2hp
Cat: 686027 Rel: 04 May 18
 
4 channel mixer module
Notes: Mix is a 4 channel mixer that is great for audio or control voltage signals. Up to four inputs can be combined to a single output each with its own level control.
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 6 in stock $98.26
Cat: 584253 Rel: 15 Apr 16
 
Compact utility synthesiser module for interfacing guitar effects with eurorack modular system - 4HP wide
Notes: The 'S.B.G' is a compact utility module intended for the interfacing of guitar effect pedals with your eurorack modular system.

It provides both attenuation and amplification of audio signals for level matching together with a crossfade control to conveniently adjust the wet/dry mix of a processed signal. The module also offers regulation of outgoing CV signals for safer use of pedal expression inputs.

Technical Specifications:

Supply: +/-12V (Reverse voltage protection)
Current Draw: ~30ma
Size: 4 HP
Depth: 22mm (including power header)
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 1 in stock $93.94
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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 5 in stock $74.50
Koma Elektronik Field Kit Expansion Pack (expansion/accessory pack)
Cat: 663392 Rel: 26 Oct 17
 
Expansion pack for the Koma Elektronik Electro Acoustic Workstation
Notes: It's all about the things you connect to the The Field Kit! To get you started, Koma Elektronik have decided to offer an Expansion Pack with a bunch of different sources that you can use and connect to create your own signature sounds.

The Expansion Pack contains:

- 2 x Contact Microphones: Use these contact microphones to pick up vibration or sound, they are an amazing versatile input source
- 1 x Electro-Magnetic Pickup: This guy is good at picking up changes in magnetic fields, you can use it to amplify a string like a guitar pickup or amplify a spinning motor
- 1 x Solenoid push-pull motor: Use the solenoid to hit things, together with the DC Interface the solenoid can make anything rhythmical and percussive
- 1 x DC motor: The Motor can be used to rotate things or as a noisy oscillator together with the Electro-Magnetic Pickup
- 1 x small speaker: Use the speaker to listen to the main mix or as a sound source and to feedback sounds
- 3 x patch cables Always handy to have around to patch up different parts of your Field Kit... and a bunch of little objects to play with (little springs, marbles)

The new KOMA Elektronik Field Kit is the perfect tool for everyone who would like to experiment with electro acoustic sound. Use everyday objects, amplify them and use them to make sound, like our heroes John Cage and David Tudor used to do!

The Field Kit is optimized to process signals from microphones, contact microphones, electromagnetic pickups and able to run DC motors and solenoids. On top of that it can receive radio signals and convert signals from switches and sensors into control voltage!
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 1 in stock $61.54
Cat: 680755 Rel: 22 May 18
 
Dual vactrol based LPG/VCA module - 2HP
Notes: The Meng Qi DPLPG is a Dual Passive 1-pole vactrol based Low Pass Gate/VCA in modest 2 HP. No power is required as the design is completely passive.

Handpicked components ensure that the modules will be musical.

Feed it a trigger and enjoy the natural smooth decay of a vactrol.
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 1 in stock $69.10
Cat: 687873 Rel: 01 May 18
 
Unique contact microphone & amplifier, based on Tom Whitwell's open-source module - 4HP
Notes: Ears is Mutable Instruments' take on Tom Whitwell's open-source Mikrophonie module - a contact microphone and amplifier.

A large palette of organic, physical sounds can be generated by scratching, tapping, and more generally collecting any kind of acoustic waves surrounding your modular case - even speaker feedback.

With its built-in envelope follower and gate detector, it can also be the gateway between external audio sources and your modular system.

Ears for your modular:

- Built-in contact microphone soldered right under the front panel, turning the panel and your entire case into a microphone.

- Increasingly spaced ridges on the panel, generating sonically interesting pulses or impulse combs when rubbed. Strike, pick or scratch digital resonators like Rings, Elements or the 4ms SMR.

- High-quality amplification stage suitable for external contact microphones, electro-acoustic instruments like guitars, or plain line-level signals.
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 8 in stock $90.70
2hp
Cat: 638779 Rel: 21 Feb 17
 
Four stage linear envelope module with two expressive ranges
Notes: ADSR is a four stage linear envelope with two expressive ranges. Each stage can be modified independently allowing for the creation of complex, multi-segment envelopes. Great for modulating filters, VCAs, and oscillators.
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 2 in stock $84.22
2hp
Cat: 725420 Rel: 19 Mar 19
 
2HP Eurorack buffered mult module - black
Notes: The 2hp Buff is a buffered multiple capable of splitting an input signal to multiple outputs. Due to its active architecture, inputs retain their full integrity as they are copied to multiple destinations. One input signal can be copied to six outputs, or two inputs can be copied to three outputs each. The Buff is especially great for splitting pitch or audio signals where signal integrity is critical. Keep your signals in shape with Buff.
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 2 in stock $75.58
2hp
Cat: 686046 Rel: 04 May 18
 
Dual linear VCA module with CV input attenuator & DC-coupled inputs
Notes: The 2hp VCA is a dual, linear VCA. It uses the renowned 2164 SSM architecture, giving it extremely low distortion and high quality audio outputs. With a CV input attenuator, and DC-coupled inputs this is your new go-to module for voltage controlled amplification of audio or CV.
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 2 in stock $90.70
2hp
Cat: 638776 Rel: 21 Feb 17
 
Random sequence generator module
Notes: TM is a probabilistic random sequence generator based on the research of Alan Turing. His Turing machine was a mathematical model of computation that could, in theory, create any output based on a set of instructions and input variables. In a similar way, the TM chooses random values for steps in a sequence based on the user's probability settings. By manipulating probability and sequence length, the module can generate an infinite number of sequences. Whether you're looking for a controlled random source, or an evolving melody generator, TM has you covered.
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 1 in stock $88.54
Cat: 688779 Rel: 11 Jul 18
 
Stereo headphone driver output - 2HP
Notes: The 'HPO' is an affordable super slim and skiff friendly no frills stereo headphone driver output for your modular synthesiser. Includes a volume control and ability to double up a mono signal into stereo. A great use for that left over 2hp in a skiff or larger system.

Give loved ones, friends and acquaintances a break from your musical 'genius', the HPO offers a solitary cell for focused creativity impregnable from undeserving non-believers.
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 5 in stock $62.62
Cat: 718920 Rel: 23 Apr 19
 
Expansion module for Zadar - 3HP
Notes: An expander for Zadar, adding one more assignable input for each Zadar channel and manual triggers.
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 8 in stock $56.14
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 $60.46
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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 8 in stock $83.10
Cat: 633370 Rel: 28 Nov 16
 
Voltage distributor synth utility module
Notes: Warna is a very useful utility module that helps you to manage control voltages in the system. Crammed in just 6 hp, there are five normalled sections: two buffered mults, two inverters, and a summing mixer. Each multiple routes the input signal to separated outputs without loss in voltage. Warna is designed for unity gain - if you apply a specific voltage to any input, it remains the same on the respective outputs. Inverters are hardwired to mults and invert the polarity of the signal applied to them. Both mults are also normalled to the mixer section via inputs. Patching anything to these inputs breaks the normalization.

The top and the bottom section both are buffered 1-in-4 multiples. The input can be inverted with a switch, i.e. its polarity will be changed by 180 degrees. Four inverted copies are then available at the outputs, meaning you can use these two sections as inverter. Bi-polar LEDs display whether the signal is positive or negative: yellow = negative, red = positive. The centre section is a four-input summing stage with amplification factor 1, a so-called unity-gain mixer. The multiples are normalized to the mixer which can be deactivated by patching.
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 2 in stock $83.14
Cat: 637403 Rel: 05 Jun 17
 
6HP Eurorack stereo headphone amp/line out module with stereo 1/4" headphone amplifier output & dual-mono 1/4" line-level outputs
Notes: The best way to get sound out of a modular. Outs is a dual independent output module featuring a stereo 1/4" headphone amplifier output and dual mono 1/4" line level outputs.

Left and Right inputs are available. If only the left input is used, it is sent to both the Left and Right outputs.
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MRP:$123.11 SAVE 22%
 1 in stock $96.11
Cat: 673007 Rel: 22 Dec 17
 
Mixer/buffered signal distributor module - 6HP
Notes: The 333 is a summing and distribution module for Eurorack modular systems.

It is composed of three identical sections, the red, yellow and green, each of those featuring three inputs summing amplifier with three independently buffered outputs.

Derived directly from the CGM creative mixer series, the sum section is DC coupled, allowing the sum of control voltages as well as audio signals.

With an extremely low tolerance in both sum and output sections, it is suitable also for summing quantized voltages like the ones coming out from the quantized outputs of the SAPEL.

In case CVs or audio signals are particularly hot, the 6dB attenuator might be helpful to reduce exactly by 50% the incoming signals.

Red and yellow output are also normalled to the 1st jack socket of the yellow and green input: in this way this module can also work as a 1 to 9 buffered multiple.
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 4 in stock $91.78
Cat: 569587 Rel: 10 Apr 15
 
Dual Bernoulli gate synth module, 6HP size
Notes: A Bernoulli gate takes a logic signal (trigger or gate) as an input, and routes it to either of its two outputs according to a random coin toss. The knob controls how fair the coin toss is - with the knob in minimal position, the first output always win, with the knob in maximal position the second output always wins - with random fun in-between. And obviously, this bias is CV-controllable!

Branches packs two such gates in a small 6-HP panel. Get a sequencer to randomly skip steps, randomize drum patterns, dispatch events from a sequence to two subpatches, or patch a monster modular Pachinko machine...

Input specifications: 100k impedance, 0.6V threshold.
Output specifications: 5V HIGH level.
Response time: 15us.
6-HP.
Current consumption: +12V: 10mA, -12V: 1mA.
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 2 in stock $95.02
Cat: 569591 Rel: 10 Apr 15
 
Multiples and mixing utilities synth module, 4HP size
Notes: Links provides 3 utility functions focused on signal distribution and mixing.

1:3 is a 3-output buffered multiple, with an offset error < 0.1%. It is useful for distributing the voltage from a CV output with a large protection resistor to several modules - particularly VCOs.

2:2 is a 2-input summer with unity gains. The sum of the two input channels is distributed to 2 outputs.

3:1 is a 3-input mixer with a gain of 1/3 for each channel (averager). It is particularly suitable for rapidly mixing audio sources such as oscillators, for which a unity gain mixer would have caused clipping.

A 2-color output monitoring LED is available for each of these functions.
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 5 in stock $58.30
Cat: 643381 Rel: 27 Mar 17
 
Lo-fi digital reverb effect unit
Notes: Digiverb is a lo-fi reverb effect unit that uses an Accutronic digital reverb "tank" module. The sound is somewhere between a virtual spring reverb and a dense multi tap delay but the effect is quite musical and interesting.

Use the Digiverb as a simple and fun way to add some extra dimensions to your patches!
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 2 in stock $77.74
Cat: 601462 Rel: 05 Apr 16
 
Reverb cartridge for TipTop Audio Z-DSP with 8 original algorithms
Notes: The Z-DSP Shimmer cartridge has 8 original algorithms, designed to combine lush reverberation with multiple voices of pitch shifting, to create ethereal pads, rich chordal textures, dissonant clouds of sound, and a variety of other sounds that are perfect for electronic music. The algorithms are customized to work with the Tiptop Audio Z-DSP Eurorack module.

There are 6 reverb algorithms in the Z-DSP Shimmer cart, arranged in order of complexity:
- Fast Shimmer: A modulated reverb that quickly decays away into an endlessly pitch shifting tail. The shift interval can be set between +/- 12 semitones. Perfect for that classic "octave up" shimmer sound.
- Slow Shimmer: Similar to Fast Shimmer, but with a much slower attack.
- Dual Shimmer: Two pitch shifted voices, embedded within a larger modulated reverb network, shifting the reverb decay in both positive and negative directions. Try slowly sweeping the Shift control in this mode for ridiculously cinematic sounds.
- Triple Shimmer: Two pitch shifted voices embedded within the reverb decay network, plus a third voice external to the network. This allows the user to have a reverb with +12 and -12 semitones of feedback, plus a stable +7 semitones voice without feedback.
- Quad Shimmer: Four pitch shifted voices feeding into a lush modulated reverb. This allows for a variety of dissonant and consonant chordal textures, with the max Shift setting corresponding to a rich major chord.
- ClusterVerb: Four pitch shifted voices embedded within the feedback network of a modulated reverb. The result quickly becomes dissonant or metallic. Perfect for insta-Ligeti, or Penderecki In A Box.

In addition, the Z-DSP Shimmer cart features 2 special effects algorithms:
- Quad Detune: 4 short pitch shifted delays, feeding back on each other. A variety of chorus, detuned, and dissonant effects can be obtained through this mode. Turn up the Feedback for maximum fun.
- PitchEcho: A single pitch shifting voice, combined with a tape echo emulation = sound mangling joy. Turn up the feedback for barberpole self-oscillation, and sweep the decay time for all sorts of swoopy glitches.
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 1 in stock $72.62
Cat: 602205 Rel: 04 Apr 16
 
Quad attenuator, attenuverter, mixer and DC voltage source - 28HP wide
Notes: The shorter and wider brother to the popular Triatt module!

The four handy knobs can act as active attenuators (unipolar) or attenuverters (bipolar) depending on the setting of the two-position switches above each one.

Each input is normalled to a precision +5V DC voltage source. With nothing plugged into the jacks, each knob controls a voltage range of 0 to +5 v or -5 to +5 v depending on the position of the mode switch.

- 2 modes for each channel
- 5v normalled to each input
- With external signals it acts as active/buffered attenuator/attenuverter/mixer
- Each output normalled to mix into the adjacent channel on the right making it possible to do sub mixes in groups of 2, 3 or all four channels.
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 9 in stock $73.43
2hp
Cat: 686022 Rel: 04 May 18
 
Compact voltage controlled LFO featuring 8 waveforms
Notes: LFO is a voltage controlled low frequency oscillator. 8 waveforms are available with smooth morphing between each, allowing for complex and unique patterns.

In addition to sine, triangle, sawtooth, and square waveforms on the primary output, four alternate waveforms are accessible simultaneously via the secondary waveform output. The alternate waveforms have been designed with modulation in mind and provide an innovative voltage source to use on filters, oscillators, and everything else.

Animate your modulations with LFO.
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 1 in stock $95.03
2hp
Cat: 667366 Rel: 31 Oct 17
 
Rhythmic pattern generator
Notes: Euclid is a rhythmic pattern generator based on ideas originally presented by Euclid, the Greek mathematician. The Euclidean algorithm can be adapted to create rhythms by taking the total number of active steps in a sequence, and then distributing them across the entirety of the pattern.

This creates cyclical rhythms that are immediately musical and can be used for everything from EDM to IDM. Bring your patches full circle with Euclid.
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 2 in stock $95.02
2hp
Cat: 649106 Rel: 11 May 17
 
MIDI Eurorack module
Notes: MIDI is a plug and play solution for interfacing with your computer or MIDI hardware. Four modes provide monophonic, duophonic, dual mono, and quad trigger operation.

MIDI clock, CC messages, and note on messages are all easily accessible between the four modes. The status LED provides clear indication of MIDI data being received by the module. Class compliant MIDI device on Mac/PC/Linux. Get connected with MIDI.
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 1 in stock $90.70
2hp
Cat: 638778 Rel: 21 Feb 17
 
Full featured two stage envelope generator module
Notes: EG is a full featured two-stage envelope generator. In addition to a colossal range from 3ms to 11 minutes per stage, EG features the ability to switch between linear and exponential curves on the fly, a built-in attenuator, and CV over attack and decay. Boasting more features than modules five times its size, EG can fill any envelope-sized gap in your system.
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 1 in stock $84.22
2hp
Cat: 686006 Rel: 04 May 18
 
Four stage linear envelope module with two expressive ranges
Notes: ADSR is a four stage linear envelope with two expressive ranges. Each stage can be modified independently allowing for the creation of complex, multi-segment envelopes. Great for modulating filters, VCAs, and oscillators.
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 1 in stock $96.10
2hp
Cat: 686016 Rel: 04 May 18
 
Rhythmic pattern generator
Notes: Euclid is a rhythmic pattern generator based on ideas originally presented by Euclid, the Greek mathematician. The Euclidean algorithm can be adapted to create rhythms by taking the total number of active steps in a sequence, and then distributing them across the entirety of the pattern.

This creates cyclical rhythms that are immediately musical and can be used for everything from EDM to IDM. Bring your patches full circle with Euclid.
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 1 in stock $97.18
2hp
Cat: 635858 Rel: 30 Dec 16
 
Clock divider/multiplier module
Notes: Div is a 2 channel, voltage controlled clock divider and multiplier. Incoming clock signals can be multiplied or divided by a factor of 16 with a multitude of values in between.

CV inputs provide external control of the current clock rate, allowing for the creation of dynamic rhythms from a single clock signal.
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 2 in stock $91.78
2hp
Cat: 680015 Rel: 12 Mar 18
 
Random voltage generator & gate source
Notes: Rnd is a random voltage generator and random gate source with an internal clock.

The quantized and smooth outputs are completely independent, and each feature an attenuator to fine tune the output voltage between 0V and 10V. This allows for a musically useful range to be defined. When externally clocked, random gates erupt from the gate output.

Great for modulation and chaotic rhythmic events, Rnd is a universal solution for adding unpredictability to your system.
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 1 in stock $91.78
2hp
Cat: 686040 Rel: 04 May 18
 
Random sequence generator module
Notes: TM is a probabilistic random sequence generator based on the research of Alan Turing. His Turing machine was a mathematical model of computation that could, in theory, create any output based on a set of instructions and input variables. In a similar way, the TM chooses random values for steps in a sequence based on the user's probability settings. By manipulating probability and sequence length, the module can generate an infinite number of sequences. Whether you're looking for a controlled random source, or an evolving melody generator, TM has you covered.
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 1 in stock $99.34
2hp
Cat: 638777 Rel: 21 Feb 17
 
Voltage controlled burst generator & trigger delay module
Notes: Brst is a voltage controlled burst generator and trigger delay. Upon receipt of a gate signal, Brst will output a stream of triggers. Knobs and CV inputs give the user control over speed and the number of repetitions. Whether you're generating bouncing balls, crafting IDM drum beats, or humanizing a clock signal, Brst will prove an indispensable addition to your rack.
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 2 in stock $75.58
Cat: 731940 Rel: 11 Jun 19
 
Compact two-channel VCA - 4HP
Notes: Module A-130-2 is the slim version of module A-132-3 and offers essentially the same features. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is half the width of the A-132-3. The module is primarily planned for applications where only limited space is available.

The module is composed of two identical voltage controlled amplifiers (VCA). Each VCA has a manual gain control (also named Initial Gain) 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 (e.g. for voltage control of the level of LFO or envelope signals). The signal input has no attenuator available but is capable to process up to 16Vpp signals (i.e. -8V...+8V) without distortion. For the processing of higher levels an external attenuator (e.g. A-183-1) is recommended.

The amplification range is 0...1. Even with a higher external control voltage the amplification remains at 1 (kind of "amplification clipping" at 1).

Controls (for each of both units):

- Gain: manual gain control (Initial Gain) in the range 0...1
- CV: attenuator for the CV input
- Lin/Exp: switches the VCA characteristic to linear or exponential, in center position the VCA is off (mute function)

Inputs and outputs (for each of both units):

- CV: control voltage input, min. +5V required for max. amplification (1) with CV control fully CW and Gain fully CCW
- In: signal input, max. 16Vpp (+8V...-8V) without distortion
- Out: signal output
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 3 in stock $77.74
Cat: 731951 Rel: 11 Jun 19
 
Quad passive switch - 4HP
Notes: A-182-2 is a simple passive module that contains four changeover switches, which are used to connect or disconnect the sockets of the corresponding socket triplet:

- In the upper position of the switch the upper socket of the corresponding socket triplet is connected to the centre socket
- In the lower position of the switch the lower socket of the corresponding socket triplet is connected to the centre socket
- In the centre position of the switch the sockets are not connected

Each unit of the module can be used to switch between two signals or to interrupt/connect a signal. In the last case the third socket of the triplet is not used.

The module is fully passive and both audio or control signals can be switched.
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 2 in stock $59.38
Cat: 577762 Rel: 06 Jun 19
 
4 channel mixer - 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-138a version features potentiometers with linear response, so especially suitable for control voltage mixing.
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 2 in stock $57.22
Cat: 731938 Rel: 10 Jun 19
 
Noise/random generator - 4HP
Notes: Module A-118-2 is the slim version of module A-118-1 and offers essentially the same features as the A-118-1. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is half the width of the A-118-1. The module is primarily planned for applications where only limited space is available. The functional difference between A-118-1 and A-118-2 is the additional T&H/S&H unit which is not included in the A-118-1.

The module generates the signals white noise, coloured noise, continuous random voltage and stepped random voltage (derived from the continuous random voltage by means of a S&H/T&H unit).

The noise signal is generated 100% analogue by amplification of the noise of a transistor. White and coloured noise are usually used as audio sources. The random voltages are normally used as control voltages (e.g. for filter frequency or any other voltage controlled parameter).

The A-118-2 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.

For the continuous random voltage the rate of change (Rate) and amplitude (Level) of the random voltage can be adjusted. The continuous random voltage is derived from the coloured noise signal by low pass filtering. Consequently the settings of the controls for the coloured noise (Blue, Red) affect the behaviour of the random voltage! A dual colour LED (red = positive / yellow = negative output voltage) indicates the continuous random voltage.

The continuous random voltage is used as source for the S&H/T&H unit. The type of operation can be set to S&H (sample and hold) or T&H (track and hold). When T&H is chosen the output signal follows the input signal (= continuous random voltage) as long as the Clock input is "high". As soon as the clock signal changes to "low" the last voltage is stored. When S&H is chosen the input signal (= continuous random voltage) is sampled at the rising edge of the Clock signal.

For the Clock signal a "digital" signal (e.g. Clock, Gate, rectangle output of an LFO) is required. It does not work with slowly changing continuous CV signals. Another dual colour LED (red = positive / yellow = negative output voltage) indicates the stepped random voltage.
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 3 in stock $77.74
Cat: 731939 Rel: 11 Jun 19
 
Voltage controlled 12dB/octave filter - 8HP
Notes: Module A-121-3 is functionally nearly identical to module A-121-2. Only the distances between the controls and sockets are smaller and rubberized, small rotary knobs are used. Therefore the front panel width is only 4HP compared to 8HP of the A-121-2. In the first place it is planned for applications where only limited space is available. The only functional difference compared to the A-121-2 is the missing attenuator for the resonance CV input CQ.

These are the most important features of the module:

- Voltage-controlled multi-mode filter with a cut-off slope of -12 dB / octave (identical to the filter of the Dark Energy II/III but has been expanded by the voltage controlled resonance feature)
- Four simultaneous outputs are available, each with different characteristics: low-pass (LP), high-pass (HP), band-pass (BP) and notch (N)
- Manual control Frequ. for the cut-off frequency of the filter (the cut-off frequency determines the point at which the respective filter effect appears)
- Two inputs for frequency control by means of external control voltages (frequency modulation, e.g. by ADSR or LFO):
- Control voltage input CV1 without attenuator, about 1V/octave sensitivity
- Control voltage input CV2 with attenuator FCV2 for the adjustment of the modulation depth of input CV2
- Frequency range about 10Hz ... 20kHz
- Manual control Q for the resonance of the filter
- Control voltage input CQ without attenuator for voltage control of the resonance
- Resonance up to self-oscillation, in which case the module will behave like a sine wave oscillator even without audio input signal
- Audio input In with attenuator Level for the adjustment of the filter input level (beyond about pos. 5 clipping/distortion occurs with typical A-100 audio levels)
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 1 in stock $96.10
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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 4 in stock $84.22
Cat: 745791 Rel: 10 Sep 19
 
Simple & effective voltage-controlled frequency divider - 8HP
Notes: Module A-163 is a voltage controlled audio frequency divider. The frequency of the input signal (preferably the rectangle output of a VCO) is divided by an integer factor N (N = 1, 2, 3, 4 ... up to 32). N can be adjusted manually and modulated with an external control voltage (e.g. from LFO, ADSR, Random, MIDI-to-CV, Theremin, Light-to-CV, analogue sequencer) with attenuator. The control input has polarizing function, i.e. the manually adjusted dividing factor can be modulated upwards or downwards. The basic idea of a polarizer is described in the modules A-133 Voltage Controlled Polarizer and A-138c Polarizing Mixer.

The output waveform is rectangle with 50% duty cycle. Unlike the A-115 with fixed dividing factors (2, 4, 8, 16) the dividing factor of the A-163 is voltage controlled and can be any integer value between 1 and about 20 (but only one output). In contrast to A-113 the dividing factor of the A-163 is voltage controlled and the output waveform is rectangle (the A-113 has 4 sawtooth outputs with 4 adjustable but not voltage controlled dividers).
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 1 in stock $77.75
Cat: 714707 Rel: 22 Jan 19
 
4HP Eurorack module consisting of four buffer circuits for control voltages
Notes: Module A-180-4 is a fourfold CV buffer. Buffers are required if the control voltage coming from a CV source shows a voltage drop in case of changing loads or due to other reasons a buffering is required.

For the lower three units the input is normalled to the output of the above unit. That way the module can work as 1-in-4 buffered multiple provided that no signals are applied to the inputs of the three lower units.

Typical applications:

- Buffering the outputs of voltage controlled switches (e.g. A-150-1, A-150-8, A-151, A-152). Comment: in case of bidirectional switches it's not possible to integrate the buffers into the switching module because the direction is not known (i.e. which terminal of the switch is working as input and which as output). All electronic switches suffer from a small residual restistance that may cause a small voltage drop without buffering. This may become a problem especially when VCOs are controlled by the switched voltages.
- Buffering of CV interfaces, quantizers, slew limiter, S&H/T&H, sequencer etc. when VCOs are controlled by the CV (provided that the module in question does not feature a buffered output)
- Buffered multiple (similar to A-180-3)
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 1 in stock $52.65
Cat: 589492 Rel: 09 Dec 15
 
Buffered multiple synthesiser module with LED indicators - 3HP wide
Notes: The Buff Mult is a buffered multiple with LED indicators to show positive and negative voltages. Using wide bandwidth opamps, it functions as a dual 1-to-3 or a single 1-to-6 mult for audio, video, or CV signals.
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 1 in stock $73.43
Cat: 671592 Rel: 29 Nov 17
 
12dB multi-mode filter based on classic SEM filter circuitry
Notes: Module A-106-5 is a 12dB multimode filter that is based on the filter circuit of the Oberheim SEM module. 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. The module generates a distorted audio signal if the level control is set to about 50% (i.e. centre position) or more with A-100 standard signals like VCOs.

Inputs: Audio In, CV1 In without attenuator, CV2 In with Polarizer
Outputs: Bandpass Out, Low/Highpass Mix-Out
Controls: Audio Attenuator, CV2 Polarizer, Frequency, Resonance, LP/HP Mix

The function and operation of this module is very similar to the Wasp filter module A-124. But the sound of both filters is very different! We will publish no separate user's manual for the A-106-5 but a combined manual for both A-106-5 and A-124. 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)

Width: 8HP / 40.3mm
Depth: 55mm (Measured from the rear side of the front panel)
Current: +12V: +30mA, -12V: -20mA
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 3 in stock $89.62
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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 3 in stock $70.18
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