Synth modules

Notes: Another update for WMD's clever dual VCA, this time a little bigger to give more control. Digital control of CV and attenuation gives lots of creative options. Third time's a charm.

Supplier's Notes:
WMD have done several designs of this circuit over the years, the first one had no knobs, the second was too small, the MKIII is finally how this circuit should be packaged. This module does some really cool stuff and is super useful in any system.

The Digital VCA lets signal through like a normal VCA, but the CV and attenuation level is controlled digitally. This lets us do things like wait until there is a zero crossing to change the amplitude, resulting in clickless amplitude changes.

The Trigger mode causes the VCA to only update when a trigger is received. The addition of a noise circuit for each side let us do a very quick and easy sample and hold that never droops. With no input, 5V is normaled to the attenuator, so you get a 0-5V sample and hold. In Bipolar mode, you can get -5 to +5V.

Both sides have bipolar VCA mode (polarizer), which lets them invert the signal when negative CV comes in. Also known as ring modulation. With the zero crossing detector, this can produce some super wild wave shapes.

Features

Dual VCA Design
Unipolar or Bipolar Operation
DC Coupled Analogue Signal Path
Low Distortion / Low Noise
VCA Closes Completely
Zero Crossing Detector Mode
Trigger Mode
Two Independent Noise Sources
8 bit CV resolution
Great for Fast Envelopes and Sine Bass Sounds

Specifications

Power: +65mA, -45mA
Width: 8HP
Depth: 35mm with cables
Height: Eurorack 3U (128.5mm)
Board Height Behind Panel: 112mm
CV/Signal Input Impedance: 100k
Output Impedance: 1k
UPD in 3.3V Threshold Schmitt Trigger
ZCD produces 15us 5V pulse
5V CV to fully open VCA
Linear VCA response
20Vpp signal handling

Notes: Hugely powerful multi-engine synth module, offering up to eight voices and eight oscillators, sample playback, custom wavetables and much more. Ultra versatile.

Supplier's Notes:
8 full voice polyphonic, multipart, multi engine synthesizer module with sample playback, sweet reverb and chorus.

Create pads, basslines, riffs and drums. All in one module.

Group voices into parts and assign each voice a different engine or parameter settings to create complex patches.

Features:

Big Sound

Lots of computing power to deliver rich sounding engines, in an 8 voice package.
One voice can have 8 oscillators depending on the engine, which means up to 64 oscillators at the same time!

Polyphonic

Coral features 8 full voices with independent filter, amplifier and modulation envelopes per voice.
Individual FX sends and individual parameter can be set per voice!

Multiengine

Different sound engines can be assigned to each voice from the 10 available.
New engines will be available through firmware updates.

Multipart

The 8 voices can be freely split into different parts. Every single parameter (filter, envelope settings, engine, FX sends, pan, etc.) can be independently set for each part or voice to create complex patches out of the box.

Sample playback

CORAL supports almost any kind of wav file: 16, 24 and 32 bit mono and stereo files, no limit to playback time!
Add overdrive to your samples, sculpt them using the filter and envelopes, pitch them up and down in tune and even modulate the sample file or folder in real time using the CV inputs or CC MIDI commands!

Custom wavetables

You can load any wavetable .wav file to the SD card for the Wavetable engine. The wavetable can be morphed in 3 dimensions. Use our OXI Wave APP to create and edit 3D wavetables.

MIDI Integration

Control any part's parameter via MIDI CC, from FXs sends to sample selection.
Combine it with CV signals for a killer compact combo.

Effects

Space engine to create deep atmospheres and rich ensemble chorus.
Every effect send can be set per voice

Notes: A Juno-inspired oscillator module? We're flattered, but credit has to go to Roland for this one. Based on the Juno-106's digitally-controlled analogue oscillators, the Castor & Pollux modernises the 80s design with a built-in LFO and hard sync.

Supplier's Notes:
Twins that dance in and out of phase, never completely together but never fully apart, bound to each other in the infinite universe.

Castor & Pollux is a dual oscillator that echoes back to the legendary Roland Juno but shines with its own unique, massive voice. It contains two digitally-controlled analogue oscillators implemented using a faithfully modernized version of the original Juno 106 design. It builds on the classic '80s sounds of its inspiration by using the second oscillator and internal LFO to layer in thick detuned sounds and harmonically complex hard synced waveforms.

Castor & Pollux II brings a redesigned interface and moves individual waveform outputs to an included expansion. Both versions have the same features and use the same firmware.

14 HP
+12 V @ 100 mA, -12 V @ 35 mA
25 mm deep
2 separate oscillators
7 octave range
9 total outputs with waveform outputs and onboard mixers
Pitch CV input jacks (0 V to 6 V) and pitch knobs (-1 to +1 octave, configurable)
Pulse width CV input jacks and knobs
Hard sync
Hardware chorusing
Internal low-frequency oscillator (LFO)

Notes: STMix is a four-channel stereo mixer in 28hp and 1U format. It can work independently or as an expansion of Befaco's Hexmix module via the six-pin connector located in the back. The module is designed under the Intellijel 1U format.

Features

Four channels stereo inputs with volume control.
AC Coupled inputs to improve audio performance.
Output clipping LED indicators.
Connector at the back to interface with the Hexmix module.
1U Intellijel format

Specs:

Current needs: +12V: 30mA, -12V: 30mA
Width: 28 HP
Depth: 20mm (including power connector)
Aluminium, heat-treated front panel
Designed, kits prepared and completed modules assembled in Barcelona

Notes: An expander module for Rossum's powerhouse Assimil8or sampler module, the Locutus provides MIDI in, out and thru connections over 5-pin DIN sockets, letting you take full control of the module alongside other MIDI gear.

Supplier's notes:
Locutus is designed to interface Assimil8or with MIDI instruments, controllers, and sequencers to provide multichannel modulation and new polyphonic possibilities.

Locutus includes a special cable to connect to the Assimil8or CPU behind the panel.

Locutus is 6 HP wide and 25mm deep.

More pricing and availability information is coming soon.

Locutus is on display in the MIDI Association booth #9901 at NAMM 2023 where Locutus and Assimil8or will be performing with a Rossum SP-1200 Reissue, an Oberheim OB-X8, and other new and vintage MIDI-equipped instruments.

MIDI Association booth #9901 is dedicated to the MIDI@40 Lifetime Achievement Award winners, including Rossum Electro-Music co-founder Dave Rossum.

From the MIDI Association: "At Saturday's anniversary celebration, lifetime achievement awards will be presented to (or posthumously honour) legendary music industry innovators who created the modern music production environment of synths, drum machines, and sequencers, including Bob Moog, Don Buchla, Ikutaro Kakehashi, Tsutomu Katoh, Roger Linn, Tom Oberheim, Alan Pearlman, Dave Rossum, and Dave Smith."

Notes: Need an offset voltage? Of course you do, you probably need one all the time, and you can never seem to find one. Well, here's two.

Yes, the Stereo Offset boasts not one but TWO linked offset voltages, and even better, they can be independently set as unipolar or bipolar with jumpers on the back of the module. To further aid your adventure in offsetting, bicolor LEDs will indicate the current state of both outputs.

Smoothly transition between voltages to simultaneously control other functions in your system, either by applying identical voltages to two different places, or by using simultaneous unipolar and bipolar signals for advanced control over your Eurorack system.

Do the right thing - get an offset generator you will love.

Dimensions: 2 HP

Notes: Expandable 4 channel VCA based stereo mixer with tone shaping and FX bus.

Chipset:

For this item, Frequency Central offer a CHIPSET which contains the following:

3 x LM13700

For all other components required, please see the build document.

Features:

4 x input channels, each featuring LEVEL, HIGH, LOW, FX send, PAN, MUTE and CV control of level.
FX send and stereo return + FX phase jumper
Left and Right Eurorack level inputs (2 x 3.5mm sockets)
Left and Right line level outputs (2 x 6.35mm sockets)
Scribble strips!

Strips is also expandable! You can add a second strips, connected to the first via a 16 pin to 16 pin cable. The cable powers the second Strips and gives you 8 channels to play with. The second Strips accesses the first Strips FX bus. When using in expanded configuration, the FX send/return and main outputs for the second Strips are not available. Here's how!

FX phase jumper - because not all FX that you might use in the FX loop are in phase with respect to their input/output. The phase jumper allows you to compensate for this and avoid weird phase cancellations.

Product Specifications

12V draw: - 43mA
5V draw: - 0mA
-12V draw: 43mA
Depth: 39mm

Notes: This is an envelope follower based on a classic module from the seventies but with some improvements to suit modern needs.

The IN signal is bifurcated to the envelope follower circuit and also to a THRU output, so the original signal is also available for external processing.

The envelope follower has three controls, a switch to select response time (fast, medium, slow), a pot to adjust GATE threshold and a pot to adjust the envelope CV level.

This little module will help you shape the timbre and/or the level envelopes of your sounds. From dynamic envelope filtering to compressor like side chaining there are lots of possibilities to mangle your audio.

Tech specs:

- 4HP width
- 35mm depth behind front panel including the power connector
- standard 10 pin euro power +12V / -12V
- power consumption +12V 18mA , -12V 16mA

Notes: As the name suggests this module can produce sub frequencies of -1 and -2 octaves relative to the square wave signal provided at the input jack.

But this is not just a simple SUB generator. It also has a little mixer that will let you add different levels of -1 and -2 octave signals to the original square wave. You can select the -2 octave signal to be a square wave or a pulse wave.

The module has individual outputs for the mixed signal, the -1 octave and the -2 octave.

This little modules can produce enough timbral variation to make you bass sound exciting.

Tech specs:

- 4HP width
- 35mm depth behind front panel including the power connector
- standard 10 pin euro power +12V / -12V
- power consumption +12V 12mA , -12V 9mA

Notes: This filter is based on the classic 2600 from the seventies and uses the LM3900 Norton opamp chip.

It has an audio inputs, two CV ins and an audio out.

You can control audio input level, CV levels, frequency cutoff and resonance.

It has a beautiful sound and it can go from relatively clean to dirty and screamy depending on audio signal level and resonance.

Tech specs:

- 8HP width
- 35mm depth behind front panel including the power connector
- standard 10 pin euro power +12V / -12V
- power consumption +12V 7mA , -12V 13mA

Notes: The Tone Science Chance Delay is a unique concept in Eurorack modules as it combines chance and randomness, with pulse delay and pulse conditioning. It is a collaboration between electronic musician/composer Ian Boddy and AJH Synth.

It can perform as a Chance generator, but is also capable of pulse stretching for Trigger to Gate conversion, pulse shortening for Gate to Trigger conversion, Gate Delay, Sub Bass Generation and also "divide by n" clock division.

There is a wide range of control and all functions can be operated manually from the front panel or can be automated using external CV voltages. Chance can range between 0 to 100%. The Gate out can be delayed by anywhere between from 0.5mS to 30 Seconds, and the output Pulse length can also vary from 0.5mS to 30 Seconds.

The TRIG push button allows manual triggering of pulses, also determined by the Chance control, and a green LED shows the output pulse status.

Includes a handy "Gate pass through" mode; when the Length control is set to zero the incoming pulse or trigger will still be determined by the Chance and Delay controls, whilst the outgoing gate length will be the same as the incoming gate length.

Compact 8hp form factor and very low power consumption make this an excellent addition to any Eurorack system.

Key features:

Chance, Gate Delay time and Pulse Length can all be set manually or controlled using external CV voltages.

The 'TRIG' push button allows manual triggering, and Chance will be applied to any manual triggering too.

Fast processing allows operation into the lower audio range, so it can perform sub bass generation on drone type sounds. In this mode the Length pot (or an external Length CV) can be used to change the PWM of the output waveform.

After the initial trigger pulse has been acted on, further incoming pulses are ignored until the current cycle has finished. This useful feature allows it to perform "divide by n" division on gate pulses, so it can be used for clock division, and the delay function can be used to add a "swing" away from the rhythm.

Gate pass through mode - if the Length pot is set to zero, then the incoming gate length is preserved, so in this case the gate has Chance and Delay time applied to it, but the outgoing gate length is the same as the incoming gate length.

By setting Chance to 100% and Delay to zero (0.5mS) it can be used as a Gate to Trigger converter, or a Trigger to Gate converter, depending on the Pulse length set with the LENGTH control. We can also use an external Length CV to shorten or increase the length of the output pulse in real time.

Fast and slow ranges for both DELAY time and PULSE length - Fast range is 0.5mS to 2 Sec and Slow Range is 2 Sec to 30 Sec.

Green status LED shows when the output pulse is high.

Front panel controls

Chance Control and CHA Input

This sets the probability of an incoming trigger or gate being passed through to the Pulse Generator circuit. The chance can be set anywhere between 0% and 100%.

The CHA input allows an external control voltage (CV) to control chance remotely. In this mode the Chance control acts as an attenuator for the incoming CV. With the Chance control fully clockwise a CV of +5V will give 100% chance, and lower CV voltages reduce the Chance accordingly. For example, a +2.5V CV will give a 50% chance. The attenuator function is useful if we are using higher control voltages of for example 0 to +10V. If we set the Chance control to the 12 o'clock position it would then halve the incoming CV signal, so in this case +10V will give 100% chance and +5V will give a 50% chance. Negative CV voltages are ignored and will be treated in the same way as zero volts..

Delay Control and DEL Input

This sets the delay amount that is applied to the leading edge of the incoming Gate or trigger received at the IN jack (or a press of the Manual Trigger button), assuming that the "Chance" has been determined to be positive. With the Delay Time switch set to FAST the Delay range will be from 0.5mS to 2 Seconds. With the Delay Time switch set to SLOW the Delay range will be between 2 Seconds and 30 Seconds.

The DEL input allows an external CV voltage to control Delay Time remotely. In this mode the Delay control acts as an attenuator for the incoming CV. With the Delay control fully clockwise a CV of +5V will give the maximum Delay time of either 2 Seconds or 30 seconds depending on the position of the Fast / Slow switch. Lower CV voltages reduce the Delay Time accordingly, so if we apply a CV of zero volts then we will get the minimum Delay time. The attenuator works on any CV patched to the DEL input in the same manner as described for the Chance control.

Length Control and LEN Input

This sets the length, or rather pulse width of the output pulse. With the LENGTH Switch set to FAST the pulse length can be anywhere between 0.5 mS to 2 Seconds. With the LENGTH Switch set to SLOW the pulse length can be between 2 seconds and 30 Seconds.

The LEN input allows an external CV to control Delay Time remotely. In this mode the Length control acts as an attenuator for the incoming CV in the same manner as the Chance and Delay controls.

Setting the Length control to zero invokes "Gate pass through" mode - in this case the incoming gate length is preserved, so the incoming pulse or trigger will still be affected by the Chance and Delay controls, but the outgoing gate length will be the same as the incoming gate length. Turning the Length control slightly clockwise will then invoke the minimum pulse length around control position 1, and further clockwise rotation will increase the Pulse Length as expected. This behaviour also applies to external CV's patched to the LEN input, where a CV of 0V will enable Gate pass through mode.

Fast / Slow mode switches

These switches allow the selection of Fast or Slow mode for Delay time and pulse length, so these ranges can be selected independently for Delay and Length. Fast range is 0.5 mS to 2 Seconds, and Slow range is 2 Seconds to 30 Seconds.

TRIG Switch

The TRIG push button allows manual triggering, and Chance will also be applied to any manual triggering, so depending on the setting of the Chance control, pressing the button has a chance of not doing anything! Holding the button down keeps the incoming gate high for as long as the button is pressed, however this is only really relevant in "Gate pass through" mode - normally only the leading edge of the input pulse is used.

IN - input jack

Connect your input here - a gate, output from an LFO, or even waveforms from a VCO. Any negative component of the input voltage will be ignored, so unipolar or bipolar signals can be used.

OUT - output jack

This outputs the binary pulse (or stream of pulses) that are generated by the Chance Delay circuitry. The gate low level is 0V and gate high level is +6V. The green status LED shows if a pulse is currently being generated.

Module Width: 8hp
Module Depth: 26mm (Including power lead)
Current Usage: 25mA Positive, 6mA Negative

Notes: Drums4 is a 4 voice, sample based percussion sound generator.

Each voice can select its sound from a 48 sample global bank, samples are curated from the manufacturer's collection of percussion sources used in their music.

Each sample can be tuned and has an individual output for independent processing , and there's also a simple mixer that controls levels to the main mixed output.

Operation is simple and intuitive, the selected sample is remembered after power down for each of the 4 voices.

Incoming triggers are displayed on each voice LED indicator.

Controls:
for each voice:
-PITCH potentiometer : for tuning sound over a wide range.
-SAMPLE SELECTOR encoder : allows choosing among 48 global samples , setting is
remembered after power down
-MIX potentiometer: adjust blending of each voice to the mix output

Connectors:
for each voice
TRIGGER jack : trigger or gate input , accepts a wide range of sources from 5v to 12v
OUT jack : individual sound output for voice
CV jack : allows external control of voice pitch, 0 to 5 volts range, over voltage protected.
Main Mix jack: summed output of mixed voices, controlled with mix pots.

Specifications:
width : 12HP
depth: 28 millimeters
Power consumption: 130 milliamps +12v , 10 milliamps -12v

Notes: R2M is module 1 of a pair of two 2 HP modules that allow you to connect a chain of controllers to your DROID master through a standard 3.5 mm stereo cable (sometimes also called aux-cable).

The usual idea is that you put all your DROID controllers into a skiff case and mount your DROID master, X7 and G8 into another case, together with all your fancy Eurorack sound modules.

R2C is module 2 of a pair of two 2 HP modules that allow you to connect a chain of controllers to your DROID master through a standard 3.5 mm stereo cable (sometimes also called aux-cable).

The usual idea is that you put all your DROID controllers into a skiff case and mount your DROID master, X7 and G8 into another case, together with all your fancy Eurorack sound modules.

While you could do this with the typical 6-pin ribbon connector (e.g. the 80 cm version that we offer), using the R2M/R2C combination has some serious advantages:

The connection cable can be almost arbitrary long (20 m have been tested and works perfectly).

Since the connection is done on the front of the modules, you can quickly disconnect your skiff for the purpose of travelling to a gig.

You can use a standard 3.5 mm stereo TRS cable for the connection.

These modules are not just passive connectors but contain special driver ICs that transform the electronic voltage levels, which run in the 6-pin ribbon, to something more stable and reliable that is fit for longer distances in a more hostile environment.

The controllers do not receive their power from the master but from the R2C module, which has a power connector and a voltage regulator for that purpose. Each chain of the R2C module provides the same power to its controller chain as the master does (it contains the identical voltage regulator). That means that you can connect up to 32 controllers (!) to one R2C.

Another nice thing: The R2M/R2C combination allows for two of these master / controller connections in parallel. That means that you can have two masters being attached to their individual controller chains. That does not mean, that each of the masters can access each of the controllers at the same time, however. Both master / controller connections work completely separately.

Package contents:
* one R2M module
* one R2C module
* one Eurorack power cable for the R2C
* two 6-pin ribbon cables for connecting the R2M to two masters
* two 3.5 mm stereo TRS cables, approx.. 1.2 m
* 4 red M3 screws for mounting the two modules

Notes: PanMix Jr is a high quality 3 channel mixer with manual panning and volume controls with dual concentric knobs. Each channel's output is separately available. Also channels 1 and 2 can be switched to be mixed with the subsequent channel, allowing for 1-1-1, 1-2, 3 mix configurations. Equal power pan law (3dB) is provided. Left and Right led indicators available for all three channels.

Several modules can be chained together via connections on the back side. This connection is possible with other Happy Nerding stereo modules too. At the moment PanMix Jr stereo output can be internally sent to another PanMix Jr, 3x Stereo Mixer and Isolator module. Or stereo signal can be received from another PanMix Jr, OUT, 3x Stereo Mixer, latest revision of PanMix.

55 mA +12V
55 mA - 12V
35 mm Depth
6 HP wide

Notes: PanMix Jr is a high quality 3 channel mixer with manual panning and volume controls with dual concentric knobs. Each channel's output is separately available. Also channels 1 and 2 can be switched to be mixed with the subsequent channel, allowing for 1-1-1, 1-2, 3 mix configurations. Equal power pan law (3dB) is provided. Left and Right led indicators available for all three channels.

Several modules can be chained together via connections on the back side. This connection is possible with other Happy Nerding stereo modules too. At the moment PanMix Jr stereo output can be internally sent to another PanMix Jr, 3x Stereo Mixer and Isolator module. Or stereo signal can be received from another PanMix Jr, OUT, 3x Stereo Mixer, latest revision of PanMix.

55 mA +12V
55 mA - 12V
35 mm Depth
6 HP wide

Notes: HN VCF is a state variable filter having 12 db Low Pass, 12 dB High Pass, 6 dB Band Pass plus 18 db Low Pass marked as "LP!", because it has extra drive. All three parameters: "Freq", "Resonance" and "Drive" have dual knobs with outer knobs controlling bipolar CV amount. These affected CVs are then shown by the relative green/blue LEDs.

The possibility to have CV over "Resonance" and "Drives" makes it a very capable 6 HP filter.

"LP!" output has 6 dB steeper slope (18 dB) compared to ordinary 12 dB "LP" output. Plus it has much more drive.

Dimensions
6 HP
35 mm deep

Current Draw
55 mA +12V
65 mA -12V

Notes: Altar is a 3-pole state variable discrete filter.

Its discrete core is a brand new design made of modern discrete transistors. The filter can morph continuously from Bandpass to Lowpass to Highpass via CV.

By changing the input gain the character of the filter can go from very clean and vocal to a more distorted acidic sound.

Technical details

Eurorack 3U module
12HP wide
33.5mm deep (including connector)
Max power consumption: +12V: 37mA | -12V: 32mA | +5V: 0mA

2 inputs, In I with variable gain, In II with fixed gain
1 output, state variable with the Color setting
Voltage controlled Resonance
Voltage controlled Colour

Notes: Module A-105-2 is a voltage controlled low pass filter with 24dB/octave slope.

It is the successor of the A-105 which had to be discontinued because the obsolete SSM2044 filter circuit. The A-105-2 is based on the SSI2144 which is in turn the successor circuit of the SSM2044. The features of both modules are nearly the same. The main difference is the clearly reduced front panel width of the A-105-2 (4HP instead of 8HP) and the associated changes of the controls and sockets positions. In addition the A-105-2 is equipped with 2 audio inputs.

The module has these controls and in/outputs available:

Control Frequ: manual frequency control
Control FCV2: attenuator for the frequency control voltage applied to socket FCV2
Control Q: manual resonance control
Control QCV: attenuator for the resonance control voltage applied to socket QCV
Control Input 1 Level: attenuator for the audio input signal applied to socket Input 1
Socket Input 1: audio input 1 (with attenuator)
Socket Input 2: audio input 2 (without attenuator)
Socket FCV1: frequency control voltage 1 (without attenuator, about 1V/oct scale)
Socket FCV2: frequency control voltage 2 (with attenuator)
Socket QCV: resonance control voltage (with attenuator)
Socket Out: audio output
Technical notes:

Frequency range: about 15Hz ... 15 kHz
Resonance up to self oscillation
Max. input voltage at Input 2 without clipping/distortion: about 15Vpp
Max. output voltage without clipping/distortion: about 15Vpp
The signals of both inputs are mixed before they are processed by the filter. This saves an external mixer for small setups.
Depth: 45 mm

HP : 4

Notes: Module A-105-2V is a voltage controlled low pass filter with 24dB/octave slope.

It is the successor of the A-105 which had to be discontinued because the obsolete SSM2044 filter circuit. The A-105-2 is based on the SSI2144 which is in turn the successor circuit of the SSM2044. The features of both modules are nearly the same. The main difference is the clearly reduced front panel width of the A-105-2 (4HP instead of 8HP) and the associated changes of the controls and sockets positions. In addition the A-105-2 is equipped with 2 audio inputs.

The module has these controls and in/outputs available:

Control Frequ: manual frequency control
Control FCV2: attenuator for the frequency control voltage applied to socket FCV2
Control Q: manual resonance control
Control QCV: attenuator for the resonance control voltage applied to socket QCV
Control Input 1 Level: attenuator for the audio input signal applied to socket Input 1
Socket Input 1: audio input 1 (with attenuator)
Socket Input 2: audio input 2 (without attenuator)
Socket FCV1: frequency control voltage 1 (without attenuator, about 1V/oct scale)
Socket FCV2: frequency control voltage 2 (with attenuator)
Socket QCV: resonance control voltage (with attenuator)
Socket Out: audio output
Technical notes:

Frequency range: about 15Hz ... 15 kHz
Resonance up to self oscillation
Max. input voltage at Input 2 without clipping/distortion: about 15Vpp
Max. output voltage without clipping/distortion: about 15Vpp
The signals of both inputs are mixed before they are processed by the filter. This saves an external mixer for small setups.
Depth: 45 mm

HP : 4

Notes: Module A-130-2v 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

A-130-2v 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.

Power consumption: 30mA at +12V and 30mA at -12V

Depth: 50mm

HP : 4

Notes: Module A-130-4 contains four linear VCAs with a common level control section for all four VCAs. It can be used for all applications of simultaneous amplitude/level control of up to four different audio or CV signals. A-130-4 is the replacement of the no longer available module A-132-2. Compared to the A-132-2 the width has been reduced from 8HP to 4HP.

The module has these controls and in/outputs available:

Control Man.: manual control of the amplification
Control CV: attenuator for the control voltage applied to socket CVo socket Input 1
Sockets In 1...4: VCA inputs 1...4
Sockets Out 1...4: VCA outputs 1...4

Application examples:

simultaneous amplitude/level control of up to four different audio or CV signals
polyphonic application 1: simultaneous control of the frequency modulation depth of 4 VCOs (Quad-LFO A-145-4 or Quad-VCLFO A-147-5 > A-130-4 > FM inputs A-111-4)
polyphonic application 2: simultaneous control of the pulsewidth modulation depth of 4 VCOs (Quad-LFO A-145-4 or Quad-VCLFO A-147-5 > A-130-4 > PWM inputs A-111-4)
simultaneous control of quadrophonic signals

Technical notes:

The maximum amplification for each VCA is about 1 ("Man." control fully CW). Even with an external control voltage applied to the CV input the maximum amplification is limited to 1.
The module is equipped with two internal connectors (pin headers with 4 pins each). Pin header #1 can be used to normalize the four inputs to other modules (e.g. Quad LFO A-145-4 or A-147-5, Quad ADSR A-143-2). Pin header #2 can be used to connect the four outputs to other modules.
The max. level at the VCA inputs without clipping/distortion is about 20Vpp or +/-10V.

Dimensions
4 HP
45 mm deep

Notes: Module A-147-5 contains four voltage controlled low frequency oscillators (VCLFO) with triangle waveform outputs. All LFOs share a common frequency control. Each of the LFOs 2, 3 features a Delta control which is used to shift the frequency of the LFO in question up or down. With the Delta controls at center positions the frequencies of all LFOs are roughly the same. To control the frequencies by external control voltages four CV inputs are available which follow roughly the 1V/oct standard.

The module has these controls and in/outputs available:

Control F: manual control of the frequency for all four LFOs
Control Delta F2, F3 and F4: manual control of the frequency shift up/down for the LFO in question
Sockets CV 1...4: Frequency control voltage inputs (normalled from top to bottom)
Sockets with triangle symbol 1...4: triangle outputs
LEDs: visual displays of the triangle outputs (red = positive, yellow = negative output voltage)

Application examples:

Generation of four triangle modulation signals with a common frequency control for all LFOs and individual controls for the frequency deviation of each LFO, manually adjustable and controllable by external control voltages
Generation of modulation signals for polyphonic FM/PWM applications. For this the four CV inputs are connected to the same control voltages which are used to control the frequencies of the corresponding VCOs. That way each LFO follows the frequency of the associated VCO with the possibility to control the frequency of all VCOs (control F) and the frequency deviations (Delta F controls). For the simultaneous modulation depth control the Quad VCA module A-130-4 is recommended.
Generation of complex modulation signals by summing up the outputs (e.g. by means of a mixer module A-138n / A-138i / A-138j)

Technical notes:

The level of the triangle outputs is about +/-5V (10Vpp)
The manually adjustable frequency ranges from about 0.025 Hz (about 40 seconds) to about 50 Hz with the delta controls of LFOs 2, 3 and 4 about center position
The frequency deviations adjusted by the delta controls are about +/-1:5. Example: with 1 Hz in center position the frequency shift ranges from about 0.2 Hz in position -5 to about 5 Hz in position +5 (1 Hz/5 = 0.2 Hz, 1 Hz*5 = 5 Hz).
The manual frequency controls and the control voltage inputs have an exponential control behavior
With external control voltage the max. frequency is about 150 Hz, the minimum frequency
The scale of the CV inputs is roughly 1V/oct (not adjustable)
The CV inputs are normalled from top to bottom. Provided that only socket CV1 is patched CV1 controls the frequencies of all four LFOs.
When each CV input is patched to it's own control voltage each LFO is controlled individually by it's own CV. In this case CV1 controls only the frequency of LFO1.
Internally the rectangle outputs are available at four terminals (typ level +/-10V or 20Vpp). If required they can be wired to four sockets of a DIY breakout module made by the user, 1k protection resistors are recommended to avoid short circuits. If lower levels are required passive attenuators (voltage dividers) may be used.
Internally is even an (unbufferd) triangle sum signal available. For this each of the four triangle outputs is simply connected to the sum output terminal via a 47k resistor. This output has high impedance and should be buffered or amplified to avoid level drop when the load changes (e.g. by means of an A-180-3 or A-180-4 or A-183-3).
By changing the values of the capacitors in the LFO circuits even other frequency ranges are possible (e.g. Quad VCO to form kind of a cloud VCO). Pay attention that the accuracy of the CV input scales is not sufficient for precise 1V/oct VCO applications. The 1V/Oct scales cannot be adjusted and the circuits are not temperature compensated.

Dimensions
4 HP
45 mm deep

Notes: MIX7 is a seven channel analogue summing mixer module for Eurorack. It is designed for summing any of the different types of signals you'll find in a modular system: Audio, CV, Triggers, or Gate.

MIX7 gives ability to sweeten your mix with more headroom using the power of low noise analog summing. A compact 3HP Eurorack utility module, MIX7 is an attractive mixing addition to any rig, especially with the ability to also combine rhythms, note patterns or CV automations from different control sources. The main output of one section can be connected to the input of another MIX7 to create larger mixing groups and complex signal routes inside your modular.

The MIX7 summing mixing circuit is built with low-noise operational amplifiers, giving it an excellent sound quality for mixing audio, the beautiful texture of classic analog mixing with plenty of headroom to handle hot modular signals, and the versatility to sum non-audio signals in your system to open up new creative possibilities.

Each input is labeled with a number of dots, 1-7, yellow for input and green for output. The module matches Tiptop's system look with clean white faceplate styling.

At the back of the module is a user-configurable jumper allowing users to configure the MIX7 for either unity gain (OUT = IN) or give increased headroom (OUT = 0.4IN) for use with hot audio signals, which makes it a great pairing for Tiptop Audio percussive modules. A peak indicator light on the front panel warns the user of even the slightest audio clipping in the mix, helping to keep all the incoming sound sources at their full original quality.

Dimensions:
3 HP
43 mm deep

Current draw:
25 mA +12V
20 mA -12V

Notes: The Serge GTO is a newly designed, complex multi-functional module which can be patch programmed to provide various slew and sample functions both for audio and CV signals, but also act as a (dual) oscillator or filter or bitcrusher or ... It is one of the essential Serge modules. The GTO is an offspring of the famous Serge SSG.

The Smooth section will place a positive and negative slew on input voltage transitions for lag effects, voltage controlled portamento and for low frequency filter applications. In Cycle-mode (cycle jack patched to the input), the Smooth side “will oscillate yielding a voltage controlled triangle wave LFO. A high level into the HOLD input will enable the Smooth Function to be used as a track-and-hold circuit with voltage controlled slew rate.

The Stepped function can be used as a sample-and-hold with voltage controlled slew rate limiting. In Cycle mode, a pulse applied to the Sample input will generate complex staircase waveforms for control voltage applications and for use as audio signals.

Each side has a temperature-compensated 1V/Oct input for use as an oscillator with a frequency range of up to 20kHz (left) and 8kHz (right). Each side tracks over 5 or 6 octaves.

The Coupler is an internal comparator which compares the output levels of the Smooth and the Stepped Generators. This output is useful for generating complex control voltages or random voltages.

Dimensions:
18 HP
25 mm deep

Current draw:
45 mA +12V
40 mA -12V

Notes: Pont-Neuf is an adapeor module which converts between eurorack jacks (3,5mm / 1/8") jacks and banana plugs, providing a simple link between eurorack and Serge 4U systems. The module provides 8 bidirectional channels, is superslim and passive, i.e. does not require a power connection. It does provide a GND-banana-jack to establish a common ground between the systems.

Dimensions:
10 HP
24 mm deep

Notes: The Haible VC Resonator is an evolution of Jurgen Haible's Resonator which was inspired by the Polymoog Resonator. As Jurgen stated: The Polymoog, an early polyphonic synthesizer, featured a 3-band "Resonator" section that allows Formant-Filtering in addition to its dynamic Filters. Such a Resonator is a very useful feature for analogue synthesizers. Each of the three (now overlapping) filter bands has a control for frequency, signal gain, and emphasis (resonance). The VC Resonator now not only adds VC control for each band, but also extends the ranges whithin which each frequency band can be set - adjacent bands can now overlap or even cross over, for instance the LOW and MED bands can now be set (or moved!) so that the LOW center frequency is higher than the MED frequency.

Jurgen's original Resonator (like the Polymoog) had a switch to select one of 3 basic modes, i.e. only one mode could be used at a time. The Haible VC Resonator now provids the same 3 modes as separate outputs so they can be used simultanously, e.g. for further processing like crossfading.

Some details of the Haible VC Resonator:

Evolution of Jurgen Haible's design
Added Voltage Control for Filter bands
Extended range of each band (overlapping)
Three separate outputs
Burr-Brown op-amps and high-end VCAs
Eurorack (3U) format, 18 hp
Skiff-friendly: < 30mm deep
Power: appr. 60mA @ +12V and 60mA @ -12V

Notes: The Erica Synths Black Stereo Delay is a hi-fi stereo delay with a lot of unique features based on our custom DSP engine. Tape, BBD and digital delay emulations with three modes, each accompanied with delay time, feedback, feedback tone and stereo spread controls allow for designing extremely delicate effects. CV control over various parameters and the ability to save up to 10 presets will make this module an integral part of any performance rack. Delay effects are developed by Dutch company www.112db.com

Features

Tape, BBD and digital delay types
Three modes for each type
Tap and clock synchronization of delay time
10 preset patches
CV control over delay time, feedback, tone, dry/wet mix and preset selection
Adjustable stereo delay spread
The modules run on new Erica Synths DSP hardware and the effects are developed in collaboration with Dutch company 112.dB who make some of the most beautiful sounding effects.

Erica Black Series include high-end, unique functionality and superior quality modules. Only the best, highest-quality components are used, all inputs and outputs are protected against undesired overvoltage. Erica Black Series consist of range of modules that are needed to put together entire synth.

Technical specifications:

Max audio input level before clipping: 16Vptp
CV input range (full span): -5V - +5V
Sampling frequency: 48kHz, 24bit
Delay time: 3..3000ms
Audio codecs: -108 dynamic range, -98dB THD+N
Power consumption: 120mA@+12V, 39mA@-12V
Module width: 12HP
Module depth: 35mm

Notes: The Morphor Plectrum - Analogue BBD Pluck is the successor of Morphor's successful module. Now only 8 HP instead of 10 HP with additional CV-able feedback!

Plectrum is a high quality, fully analogue Eurorack module that can produce plucked string-like sounds. It is a compact all-in-one solution for generating amazing bass, acoustic guitar, percussion and other amazing sounds.

The module is based on the Karplus-Strong principle with a true analog audio path built with an authentic bucket brigade delay (BBD) circuit which is recognizable by its specific timbre. By using carefully chosen high quality components, this module has a rich, warm analogue sound.

Now being only 8 HP in width, you won't need a lot of space to get going and start creating some incredible sounds. If you're looking to fully sculpt the string-like sound, you can extend the internal Karplus-Strong loop by breaking out the signal and adding external modules like filters and/or FX modules to it.

Features

100% analogue
Karplus-Strong principle
Built with classic BBD chip
Break-out BBD loop
Internal/external loop switch
Trigger input
1V/oct input
Tune knob
Pitch modulation CV input
Feedback CV input
Colour CV input (i.e. internal loop LPF cut-off frequency)
Mono output

Specifications

Panel width: 8 HP
Panel height: 3 U
Module depth: 40 mm
Current draw: 12V : 40 mA | -12V : 40 mA | +5V : 0 mA
Dimensions: 128.5 x 40.3 x 40 mm
Weight: 259 g
Frequency Range: sub-audio range to roughly 800 Hz
Power Socket: 16-pin

Notes: Building on the familiar dual VCO core arrangement of Carrier and Modulator, Mindphaser is a complex oscillator which departs from this bit of ancestral DNA with a modern toolkit focused on searing, phase-modulated leads, percussive basslines and other-worldly effects!

A diverse palette of intermodulation and harmonic experimentation is offered through the Modulation Bus, its unique Waveshaper and the dedicated Thru-zero Phase Modulation Bus. An intuitive interface provides colour-coded visual feedback and responsive indication while performing in dimly-lit environments.

Two precision analogue oscillator cores

Precision, wide-range V/oct ramp cores, each ranging from deep subsonic to supersonic frequencies (ramp cores, and not triangular, deliver the ideal waveforms for analogue phase accumulation in the TZ-PM Bus)
Each core generates fundamental waveshapes which interact and mangle one-another through the complex Modulation Bus and TZ-PM bus
Simultaneous waveform outputs for each base shape
Dedicated button to toggle between RAMP or SAW for each core, inverting the phase of the ramp output
V/oct, linear FM and exponential FM inputs which are all independent of the TZ-PM functionality. The Carrier's FM occurs inside the core itself, separate from the TZ-PM bus.
DC-coupled linear FM

Carrier

The heartbeat of Mindphaser, focused on audio-rate generation. Drives the WAVESHAPER and TZ-PM bus. This core's frequency range spans the audible spectrum.

- An external hard SYNC IN forcibly resets the core, useful for punchy sequences, percussive basslines and drum synthesis -- or to sync to another VCO.

- Coarse and fine controls conveniently span the audible spectrum. Ranges further with external CV.

Modulator

An extremely wide range oscillator, spanning from deep LFO frequencies all the way up to supersonic sound! Four base waveforms and diverse internal routing options form a versatile palette of modulations for the CARRIER to feed on.

- Activating hard SYNC on the Modulator locks its core to the Carrier's heartbeat. The effect can be dramatic. Try this while phase modulating!

- Octave RANGE switch lets you quickly flick up and down between octaves. All the way beyond audio-rate and LFO speed octaves. Perfect for experimenting with different PM sidebands and taming the wide frequency range of the Modulator.

- Manual PW (Pulse Width) control and dedicated CV input for PWM.

Waveshaper

This isn't a classic waveshaper! Developed anew from the ground up, this waveshaper is focused on deep harmonic experimentation and audio obliteration. Each waveshaper parameter is capable of being "turned up to 11".

FOLD up to 5 octaves above the fundamental Carrier frequency. A ceiling forms at maximum, imparting additional harmonics.

FEEDBACK the waveshaped and phase-modulated audio through a signal path internal to the waveshaper.

AMPLITUDE modulation spans thru-zero, allowing for full-range ring modulation effects with bipolar CV or audio signals.

CLIP the final stage of amplitude with the switch to introduce a last stage of harmonics before the complex signal exits through the final OUT.

Switchable inverting attenuators on each CV input, for quickly inverting the behaviour of your modulation. The indicator illuminates red to tell you the attenuator has been inverted.

Two distinct waveshaping modes

A press of the shape switch toggles Mindphaser between RAMPOID (green) and TRIANGULAR (yellow) waveshaping modes.

These modes have a remarkable effect on the behaviour of wavefolding and overall character of the final complex OUT, in addition to TZ-PM Bus character.

RAMPOID mode folds more asymmetrically, with raucous, buzzing harmonic artefacts as you sweep and introduce TZ-PM

TRIANGULAR mode folds more symmetric, splitting the complex sine wave at its peak centre of the waveform. TZ-PM character is less raucous, and more smooth.

TZ-PM Bus

Thru-zero phase modulation in the ANALOGUE realm! Unlike its digital counterpart, analogue TZ-PM has its own character we've come to expect from analogue circuitry!

A dedicated, voltage-controlled phase modulation bus completely separate from the Mod Bus
Modulator's SINE wave normalled to the PM SOURCE input
SOURCE input allows you to modulate phase with any signal you patch in
Dedicated voltage-controlled INDEX (amount)
Manual phase lets you zero in (or not!) on the base phase before introducing modulation
Independent of the Linear FM circuitry in the Carrier core

Mod Bus

The internal modulation powerhouse, normally fed by the Modulator core, but external signals are patchable as well.

Select from the PULSE, RAMP/SAW or SINE output of the MODULATOR, or inject your own SOURCE to the bus.

Voltage-controlled INDEX behaves like a macro control when combined with various amounts and polarities dialled in at each CV destination.

Internal sends include the Carrier's classic Linear FM, Amplitude, Feedback and TZ-PM Index, with variable amounts and polarities!

Modulator waveforms internally feeding the Mod Bus behave unipolarly, for predictable modulation of every Mod Bus destination, without external patching. By patching in one of the Modulator's bipolar waveform outputs manually (or any external signal), you can override this behaviour.

Dimensions
30 HP
24 mm deep

Current Draw
110 mA +12V
100 mA -12V

Notes: ***B-STOCK: Box opened, product in excellent condition, no original internal packaging***


Intellijel has made the already awesome Thru Zero VCO Rubicon even better! In addition to the seven waveforms plus sub-oscillator of the first version, the second generation offers a new Warp stage, which generates a hybrid of complex pulse and other waves - you can even use external audio material. In order to keep results in the range of 10 Vpp, there is a wave folder called Squish. On top, the FM capabilities were expanded.

Notes: ***B-STOCK: Box opened, product in perfect working order***


Record. Mangle. Destroy.

Nebulae is a granular sampler and DSP platform. Its phase vocoder audio engine provides elastic audio, which can be time stretched, granularized, and mangled to no end. With independent control over pitch and speed, and granular controls such as overlap, window, and density, finding new sonic territory is only a knob turn away. Nebulae can use live audio input, a recorded buffer, or audio files as the source material for its powerful audio manipulations. The live input buffer can record up to five minutes of stereo audio at 48kHz, 24 bit. In addition, up to 75 MB of stereo audio can be loaded simultaneously through the USB port. No naming convention or special formatting necessary; just plug and play.

Nebulae lives a double life as an open source DSP platform with an extensive library of off the shelf alternate instruments. You can turn the module into a lush reverb, spectral delay, or tape-style looper simply by loading a new file onto the flash drive. Do you want to tweak one aspect of an existing instrument, even the default functionality? No problem. No prior coding knowledge is necessary to tweak and refine existing firmware to your liking or start with one of our templates. Alternate firmware files can be written with Pure Data, Csound, SuperCollider, and even bare-bones C programs.

Notes: ***B-STOCK: Box opened, light surface marks, product in perfect working condition ***


Inspired by Roland's TR-x0x sequencers, the Drum Sequencer brings that classic approach to Eurorack, offering a massive 16 trigger channels with gate and accent outputs, plus a CV/gate track for synths.

Supplier's notes:
X0X-style beat creation for modular systems - Erica's drum sequencer is based on the concepts of classic Roland TR rhythm composers. The module offers 16 trigger channels, twelve of which also feature accent outputs. Additionally, there is a CV and a gate track, meaning you can also notate a bass line or melody. The maximum pattern length is 64 steps. Extensive playback and random functions plus two LFOs help you with creating lively results. Large buttons provide a fantastic feel while programming patterns.

Notes: Gross, gritty, and dark industrial-strength voice on a swappable oscillator platform. Pangolin approved.

Manis Iteritas Alia is a voice based on the architecture of Basimilus. It was designed to be grittier and more aggressive by using only sawtooth waves that are manipulated, modulated, and distorted through a rethought interface. Manis Iteritas Alia is fantastic for leads, basslines, drums, darkness, detuned swarminess, or pure mayhem. Plus, MIA's dedicated envelope output is a great modulation source for the rest of your patch.

MIA is available on Noise Engineering's 10HP Alia oscillator platform. Buy an Alia module and use the included USB cable to connect to the Noise Engineering Customer Portal to check out any other Alia firmware, free of charge, any time.

A portion of the proceeds of every Manis Iteritas Alia sold goes to pangolin conservation.

Width: 10HP
Depth: 22mm

Notes: Gross, gritty, and dark industrial-strength voice on a swappable oscillator platform. Pangolin approved.

Manis Iteritas Alia is a voice based on the architecture of Basimilus. It was designed to be grittier and more aggressive by using only sawtooth waves that are manipulated, modulated, and distorted through a rethought interface. Manis Iteritas Alia is fantastic for leads, basslines, drums, darkness, detuned swarminess, or pure mayhem. Plus, MIA's dedicated envelope output is a great modulation source for the rest of your patch.

MIA is available on Noise Engineering's 10HP Alia oscillator platform. Buy an Alia module and use the included USB cable to connect to the Noise Engineering Customer Portal to check out any other Alia firmware, free of charge, any time.

A portion of the proceeds of every Manis Iteritas Alia sold goes to pangolin conservation.

Width: 10HP
Depth: 22mm

Notes: Hybrid additive phase-modulation voice on a swappable oscillator platform

Debel Iteritas Alia is a hybrid additive phase-modulation voice inspired by classic and experimental synth sounds from across the decades. Three synthesis algorithms range from classic FM plucks and basses to all-out additive anarchy. DIA features a two-parameter envelope with a huge range of shapes and timing, making it easy to dial in the exact sound you want. With CV over every parameter, a dedicated envelope output, and an absolutely massive timbral range, Debel Iteritas Alia is a powerhouse synth voice in a compact package.

DIA is available on Noise Engineering's 10HP Alia oscillator platform. Buy an Alia module and use the included USB cable to connect to the Noise Engineering Customer Portal to check out any other Alia firmware, free of charge, any time.

Width: 10HP
Depth: 22mm

Notes: ***B-STOCK: Box opened, but product is in excellent condition and in perfect working order***


Eurorack is a synthesist's toy chest. Stompboxes are a guitarist's toy chest. Each industry offers a seemingly infinite variety of products that enable musicians to build systems unique to their needs and to create a signature sound. Each is also somewhat addictive. Rare is the musician who doesn't eventually need a larger toy chest to house the accumulated toys.

Fortunately for the budget-conscious musician, Eurorack modules and stompboxes have always existed in separate worlds - someone whose Eurorack system consumes an entire wall in their home is usually not the same person whose pedalboard now requires a dedicated roadie just to transport it to the gig.

Intellijel's Stomp removes the barrier between Eurorack and stompbox. It provides the modular synthesist with a portal to stompbox nirvana, and the guitarist with a wormhole to the sonic manipulations of Eurorack modules.

Stomp enables the modular synthesist to interact with the impressive assortment of delays, choruses, flangers, phasers, fuzz boxes, tremolos, wah-wahs, amp simulators, compressors, and pitch shifter pedals available to guitarists. If your effects pedal is adorned with an expression pedal input, Stomp supports that too, and even features a built-in LFO to modulate your pedal's expression input. Need something crazier? No problem. Simply patch any modulation source from your modular system into the expression control jack to override the built-in LFO.

Conversely, guitarists can plug their guitar directly into Stomp's RETURN jack, giving them access to the myriad filters, ring mods, wavefolders and - most importantly - the near-infinite CV modulation delights inherent in Eurorack.

Features:

Robust Neutrik 1/4" TS connectors for the SEND/RETURN and TRS for the Expression interface
Signals arriving at Stomp's RETURN jack pass through a Class A triode emulator, allowing for some tube-like overdrive at high gain setting.
Stomp is more than just a simple level shifter - it's also an impedance converter, which provides proper drive and loading for any FX pedals or instruments you connect.
Separate gain controls on both the SEND and RETURN. This enables you to adjust the level of any audio being sent to the FX pedals as well as any audio coming back into the modular. Not only does this allow you to optimize the signal-to-noise ratio, but by significantly boosting the RETURN level, you can achieve some pleasingly overdriven tones.
Supports both Instrument and Line levels via a front panel switch.
Use Stomp's RETURN circuit as a "direct box" for connecting any instrument.
The high input impedance of the RETURN circuit allows it to be used as a piezo pickup preamp for acoustic instruments.
Use Stomp in the studio as an active "re-amping" device to play pre-recorded tracks back through guitar amplifiers or pedals.
All inputs are protected for minimum RF interference.
Return signal can be phase inverted for use with those pedals or effects types that invert phase.
Low MIX output impedance for driving long cables, lower noise, and minimum interference from outside sources.
The Expression Pedal Output converts analogue CV sources (or the internal LFO) into an output compatible with most stompbox Expression inputs.

Size: 8HP
Depth: 35mm
Power: 47mA @ +12V 13mA @ -12V

Notes: Cleverly designed melodic looping sequencer/sampler, offering four pattern banks each with 16 steps, aiming to bring 'DAW-style' workflows to Eurorack - sample reversing, pitch shifting, and so on.

Suppliers notes:
Torus is an overdub looper for harmonic playback. It offers four, 16-step pattern banks for sequencing as well as other sample manipulation techniques. It was designed to bring daw recording workflows (sample reversing, pitch shifting, sequencing, etc.) to eurorack cases.

Inputs:

A, B, C, D - buttons for choosing the current pattern. When combined with chain, these buttons can be used to sequence a pattern chain. Individual chains can be support 16 steps and are kept in sync with torus's global clock.

Chain - button for chaining behaviours. Chain + A, B, C, D can be used to sequence a pattern chain. Chain + record can be used to record multiple patterns in series and then chain playback. Chain + clear can be used to clear all recorded patterns. Chain + tap can be used to reset the current pattern when it contains recordings.

Mix - knob and CV used to blend between the input signal and the recorded pattern.

Record - button and gate in for turning on and off recording. When a pattern is not recorded, record will turn on and in sync with the clock. When a pattern is recorded, record will immediately turn on and off overdubbing.

Oct - buttons for octave shifting pattern buffer playback. Oct buttons can be used to clock divide/multiply an input clock signal.

Reverse - button and gate in for reversing buffer playback.

Harm - knob and CV for choosing harmonic pattern playback speeds. Playback speeds include both integer clock multipliers and perfect intervals.

Tap - button for tapping in tempos for the internal clock. Tap will repeat the current note when the current pattern contains recordings. Combine with chain to reset the entire pattern when the current pattern contains recordings.

Clear - button and gate in for clearing the current pattern. Combine with chain to clear all recorded patterns.

Clock - gate in for clock syncing

In L and in R - audio input, left will be converted to stereo if there is no right input.

Outputs:

Harm out - gate output mapping to harmonic playback resets. This gate output will range from 1-16x the clock out frequency depending on the harm knob/CV value.

Clock out - gate output for the global clock. The output gate frequency will be 0.25-4x the input clock speed based on the oct button state.

Reset - gate output when the current pattern has reset.

Out L and out R - audio output

100 mA +12V 40 mA -12V 0 mA 5V

16 HP 35mm deep

Notes: Dizygote is an A-side/B-side digital oscillator with a built-in envelope generator. The A-side builds harmonies with a square waveform and frequency modulation. the b-side distorts a sine waveform with phase modulation.

Inputs:

Trig - button and gate in to trigger oscillator amplitude envelopes
Switch - button and gate in for toggling between the a and b sides
Length - knob and CV in for changing the envelope length
Mod - knob and CV in for changing the phase and fm modulation amounts
Mfreq - knob and CV in for changing the phase and fm modulation frequencies
Freq - knob for setting the oscillator frequency
V/oct - voltage per octave CV for modulating the oscillator frequency

Outputs:

Out L and out R - audio output
Env - CV envelope out

Notes: Monolith is a pitch-shifter reverb inspired by west coast synthesis techniques. It utilizes a time-domain based FM algorithm that acts as a shimmer.

Inputs:

In L and In R - audio input, left will be converted to stereo if there is no right input
Blend - knob and CV for controlling the fade between the dry and FM audio signals
DJ filter - knob and CV for controlling the reverb delay line filtering
Wet - knob and CV for controlling the reverb decay
Mod - knob and CV for controlling the scale of FM modulation. Low mod values correspond with microtonal pitch regions. High mod values correspond with multiple octave shifts.
On - button and CV gate for toggling on/off FM modulation. When FM modulation is turned on/off, the FM modulator oscillator is reset.
Quant - button and CV gate for toggling on/off FM pitch quantization.
Freq and v/oct - knob and CV for controlling the frequency of the FM modulator oscillator. Also control reverb pre-delay.
Shape - knob and CV for controlling FM modulator oscillator shape. Shape wavetable transitions from sine wave (8 o'clock) to triangle wave (12 o'clock) to square wave (4 o'clock).
Clock - CV gate for tempo syncing modulator oscillator period.

Outputs:

Out L and out R - audio output
Gate - CV gate out that is period synced with the FM modulator oscillator

100 mA +12V 40 mA -12V
14 HP 35 mm deep

Notes: Uni is a triple attenuverter utility module designed to give cases gigantic macro control knobs.

Inputs:

CV inputs 1 and 3 - CV input for bidirectional attenuation. When input cables aren't plugged into these jacks, 5v reference signals will be used.
CV input 2 - CV input for either unidirectional or bidirectional attenuation. When an input cable isn't plugged into this jack, a 5v reference signal will be used.
Switch - toggles CV input 2 between unidirectional and bidirectional attenuation.

Outputs:

CV outputs 1, 2 and 3 - attenuated CV output. If no cables are plugged into an output jack, it is summed into the subsequent output jack.

25 mA +12V 20 mA -12V 0 mA 5V
10 HP 27mm deep

Notes: ***B-STOCK: Item refurbished, repaired and in perfect working order.***


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

Notes: Poti II expander notable features:

- per-channel input and output attenuation for the SINE and ASSGN outputs
- per-channel shape modulation with switchable destination (wave folding, shape switching, PWM)
- stores settings during a power cycle
- LED indication of the discrepancy between the stored setting and current pot position
- 4HP
- +10/-0mA from Batumi II

Notes: An accurate Manual Voltage Source.

Voltio fits somewhere between a music tool and a piece of electronics lab gear.

It generates voltages equivalent to all the notes on the 12-tone equal temperament scale throughout a ten-octave range, with an intuitive two-knob interface.

The Precision Adder In, lets you sum Voltio's Out with external voltages.

Additionally, the front panel banana connectors let you plug standard multimeter probes for hands-free operation on electronics lab.

Use it to transpose Oscillators and sequences in a musical way or as a reference to calibrate your analogue gear.

Features:

Easily adjust your oscillators in known intervals.
Transpose Musical phrases from sequencers, arpeggiators, or any other notes source.
Calibrate oscillators and filters on your DIY projects or during analogue gear maintenance.

Specs:

Current needs: +12V: 35mA, -12V: 15mA
Width: 6 HP
Depth: 30mm including power connector
Designed, kits prepared and assembled in Barcelona.

Notes: ***B-STOCK: Box opened, product in perfect working order***


Erica Synths Modulator is an advanced modulation and pitched noise source with focus on rhythmic (but not limited to) compositions in mind. It features two identical syncable to the BPM LFOs/noise sources with selectable morphing waveshapes. LFO frequency can be manually adjustable, as well as they provide frequency divisions and multiplication in Sync mode. Each LFO has two outputs- main one and secondary one with adjustable phase, so you can create evolving modulations. Furthermore, LFOs can be linked to work at the same frequency and the first LFO has built in VCA to control output signal amplitude.

Notes: ***B-STOCK: Box opened, product in perfect working order***


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.

Notes: The tiny but mighty Eurorack power supply with all the bells and whistles

Micronova is a miniature power supply with a big soul. It can provide up to 18W of power for your modules and multiple units can be easily daisy chained to power larger systems.

This bundle includes:

an assembled Micronova
an assembled Micronova busboard
a Micronova front entry kit

Please note that the front entry requires assembly. It's a delightfully easy kit, but make sure you know what you're getting into!

A suitable AC-DC power adapter is required. We have adapters available for domestic customers. International customers please take a look at the manual for guidance and recommendations.

Check out the manual to get to know Micronova and all of the delightful ways you can integrate it into your case.

100 mm x 30 mm x 13 mm
15-20V, 1.5A
+12V @ 1A
-12V @ 300mA
+5V @ 500mA
Daisy chainable
Busboard included
Front entry kit included

Notes: Nive Grad is a level shifter designed for simplicity. Two Eurorack signals can be attenuated down to pedal and line levels, and two external line or pedal signals can be amplified up to Eurorack level. Integrating a drum machine, external synth, effects processor, or guitar with your Eurorack system has never been easier!

Nive Grad uses 1/8" jacks to save HP. If you want to use 1/4" gear with your system, ask your modular supplier about mono/TS 1/8" to 1/4" adapters or adapter cables.

Nive Grad pairs well with Noise Engineering's Xer Mixa system mixer, but can be used in any Eurorack system.

Type: Universal drum synthesizer
Size: Level Shifter
Depth: .9 inches
Power: 2x5 Eurorack
+12 V: 25 mA
-12 V: 25 mA
5 V: 0mA
Nive - level - from Latin niveum

Grad - step or degree- from Latin Gradus

Notes: Nive Grad is a level shifter designed for simplicity. Two Eurorack signals can be attenuated down to pedal and line levels, and two external line or pedal signals can be amplified up to Eurorack level. Integrating a drum machine, external synth, effects processor, or guitar with your Eurorack system has never been easier!

Nive Grad uses 1/8" jacks to save HP. If you want to use 1/4" gear with your system, ask your modular supplier about mono/TS 1/8" to 1/4" adapters or adapter cables.

Nive Grad pairs well with Noise Engineering's Xer Mixa system mixer, but can be used in any Eurorack system.

Type: Universal drum synthesizer
Size: Level Shifter
Depth: .9 inches
Power: 2x5 Eurorack
+12 V: 25 mA
-12 V: 25 mA
5 V: 0mA
Nive - level - from Latin niveum

Grad - step or degree- from Latin Gradus

Notes: In recent years, stereo signal paths have increasingly found their way into the wonderful world of Eurorack synthesis - so naturally, utilities should follow suit. Introducing psATT, a simple solution to a problem you might not even realise you had. Far from just useful as an attenuator for audio sources in mixdowns, the psATT can also be used to bring stereo audio signals down to more manageable levels (such as line level), attenuate multiple signals simultaneously (like increasing the modulation depth of two LFO's at the same time! It's like having two hands, but with one hand!) and is even normalled, so if you only have a mono signal, the attenuated signal will be present at both outputs. That's what utility is all about!

There's not much else to say, except that it's passive, and draws no power - and it looks very classy in black and gold; and it's also only 2hp.

Notes: A compact Voltage Controlled Oscillator designed for generating SINE waves, Variable wave-SHAPEs, SUB-Octaves, Oscillator SYNC and Linear FM in the analog domain.

The Sub-Timbral Oscillator is the more subtle and melodic friend to the DPO's complex harmonic lattice.