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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.

Notes: MMF is an analogue, multimode filter with a 12dB per octave slope. Its sonic character swings all the way from classic low pass to squelchy acid lines. Simultaneous outputs of low pass, high pass, and band pass filter types are provided allowing for many variations of the input signal. Whether you're looking for smooth and creamy, or resonant and wild, MMF can go there.

Notes: Easily connect your modular system to the rest of your setup with Out, a compact 2HP stereo line output and headphone module. Despite its small size, it includes everything you need for clear, convenient listening.

The top section features stereo modular-level inputs with LED indicators for quick level monitoring. From there, the signal is routed to both a stereo line output and a dedicated headphone jack, each with independent volume control. Whether you're sending your modular through external effects, recording into an interface, or just monitoring with headphones, Out keeps things simple and efficient.

Notes: Capture the iconic sound of tape sliding to a halt with Tape Stop, a clock syncable tape stop module that puts this classic effect at your fingertips. Originally an accidental artifact of analog tape, this effect has become a beloved tool in music genres from hip-hop to IDM. Now, it's fully controllable in your modular system.

Adjust the Lag to set the stop length, then tap Trig to activate. Hit it again to resume your audio seamlessly. With clock sync, your stops and starts stay perfectly in time, and a toggle lets you switch between momentary and latching Trig modes. Add a touch of tape magic to your modular system with Tape Stop!

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.

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.

Notes: The Listen IO is a simple module which gets signals in and out of a Eurorack system by converting to and from normal modular levels. The top section converts any external signal to modular levels by providing up to 30x gain (+30dB), allowing you to use table-top synthesizers, keyboards, phones/tablets, computers, toys, microphones, etc. in your patches. The bottom section does the opposite: modular signals are converted to normal line level signals. The bottom two jacks can be used as line outs or as headphone jacks, so you and a friend can listen in stereo at the same time.

Each section has two inputs and outputs for use with a stereo signal or two mono signals. An LED bar graph for each output shows the signal level and clipping.

Notes: The MetaModule Wi-Fi Expander lets you connect to your MetaModule wirelessly using a web browser.

Quickly transfer patches you created on the computer and play them on your MetaModule without swapping disks or USB drives.

4 HP
Power consumption: +12V max 50mA. -12V: none. -5V: none.

Notes: The Row Power 25 is a clean, regulated, and protected power supply module for Eurorack systems. It requires a barrel-style power brick (15V - 20V DC) and supplies power to modules via flying bus cables, direct connection, and/or bus boards.

The Row Power 25 provides 25W of power for any Eurorack modules (typically 4-10 modules*):

+12V @ 1.4A maximum, 1.0A recommended
-12V @ 0.8A maximum, 0.5A recommended
+5V @ 1.0A maximum, 0.8A recommended

*number of modules can vary depending on each module's power consumption.

Simply plug a universal power supply (laptop style) into either of the barrel plugs on the 4HP panel. Connect your modules via flying-bus cables or the Bus Stick.

Multiple Row Power modules can be powered from a single power brick by daisy-chaining with an inexpensive barrel cable. The Row Power 25 can also be daisy-chained to Pods. Each Row Power and Pod will be independently regulated and protected for ultra-low cross-talk between rows.

Notes: Junction requires a +12V / -12v power supply with a 2x5 pin ribbon cable (included). The red line of the ribbon cable must be aligned with the -12V marking next to the module's power header and on your case's power distribution board. Junction draws 23mA from the +12 rail and 20mA from the -12 rail. Please ensure you have
enough power available before installing.

About Junction

Junction is a compact, 4 channel attenuverter, cascading mixer and multiple designed to fine tune the control voltages in your rack to the perfect range for their destinations. Junction can be used as a source of fixed voltage, offset another voltage, or mix multiple voltages together to create complex and dynamic modulation.

Features

Each channel on Junction has a knob (1) that acts as a manual control for the attenuverter. Center position (12 o clock) is 0V. The first channel input (2) is normalized to +5V when no cable is plugged into it.

A buffered copy of the input signal of the first channel is present on all of the other inputs from from the first (2) to the last (8). This duplication is "cascading" as shown by the arrow graphics on the panel - if a cable is patched into any input, it "breaks" the cascading multiple - all unpatched inputs carry the signal present at the uppermost patched input (or +5V if no inputs are patched). For example, if a signal is patched into the second channel's input (4) the third (6) and fourth (8) channel inputs would carry a copy of the second channel's input instead of the first channel input.

Junction's channels are mixed on the outputs. The output mixer is also "cascading" - when a cable is patched into an output, it carries a mix of it's own output and all unpatched channel outputs above it. For example, if only the last channel output (9) is patched, this output will carry a mix of all of the outputs. Patching the first channel output (3) would remove it from this mix.

Even though Junction's inputs cascade and outputs mix, Junction's output will clip at the Eurorack power rail voltages of +12 and -12V. It is not possible to output a voltage outside of this range, regardless of the signals patched into Junction.

23mA +12 / 20mA -12 4 HP / 25mm
Deep Reverse Power Protection

Notes: A passive module to allow easy connection from Modular to Eurorack, avoid flimsy hook probes or alligator wires with a robust connection that will keep your signal intact.

Features:

3.5mm jack to BNC including 50O male-male cables.
Ships calibrated set to 10x as default, user's can select 1x but soldering a smd jumper.

Specs:

4HP
15mm deep
Passive

Notes: This small utility is the pedal's lover best friend, it allows 2 diferent chains of pedals to be independently connected to your synth.

The Send channels attenuate the synth level to instrument level.

The Return channels amplify the signal from instrument to synth level.

Specs:
- Width: 4 HP
- Depth: 3 cm
- Max current: 10mA

Notes: ADDAC200RM allows a simple and straight forward way to monitor the voltage of your system. A 0.1% precision analogue voltage meter shows the status of both +12V and -12V rail.

Eurorack +/-12V power rails

Although we all refer to Eurorack PSU voltages as +12V and -12V this is hardly ever the case, although most systems operate at close proximity to this ideal reference, there are situations where the drop from the ideal voltage is large enough to influence the performance of your system.

PSU current ratings

Running a PSU too close to its limits will always cause more stress to the PSU, a good practice it to use only about 75% of your PSU maximum ratings, this will greatly extend the PSU life.

PSUs will show a small voltage drop as current increases which will drastically increase when pushed closed to it's limits. Heat will also influence this drop, heat is related to the current drawn, as more current is being drawn more heat will build up on the PSU, heat conditions will reduce the maxi- mum amount of current that can be delivered by the PSU. While the current consumption drop is somewhat stable and immediate (as you turn the frame on the current consumption will stabilize in a few seconds) the heat drop will take some time to occur, heat will build up over time until it stabilizes and only if it has "headroom" to stabilize. If heat dissipation is not effective than the drop will continue until it reaches a balance point which can be several volts below the 12V reference. At this point your PSU will be under great stress and the heat generated is prone to leave some permanent scars.

Heat will start to have an impact at about an ambient temperature of 50 degrees celsius, at 70 degrees the maxi- mum current rating will drop by 50%. If your PSU is rated at 2A maximum and it's running at 70 degrees then it will only be able to deliver 1A maximum.
For the PSU this is a complex balancing act as current influences heat and heat influences the maximum amount of current available which all together influences the voltage drop.

This is why it's so important to keep the PSU load at a sensible level.

PSU protections

Some PSUs feature over voltage, over current and overheating protection and will turn off when the operating conditions trigger any of the protection threshold levels.

At this point it's typical that the PSU will enter a Hiccup mode, where it turns on checks the current conditions and quickly turns off if they haven't changed, leaving it in an intermittent limbo where it powers on and off at some regular frequency.

If the conditions change enough to drop below the protection threshold levels then the PSU will automatically recover and stay on.

PSU stress

Different situations can be responsible for causing stress that can damage the PSU, it's possible to reverse a ribbon power cable enough times or leaving it connected long enough to partly damage the PSU.

Another situation is having a module that due to some partial previous damage may be drawing more current than specified which will not be accounted for when calculating your system current consumption.

Stress can cause permanent damage to the PSU, however some damages can be only partial leaving you with a PSU that no longer features the specs described by the manufacturer but with no apparent misbehaviour. The LED monitors on bus boards will be on, but in reality it will be underperforming at an unknown percentage of the original specs. These situations can be quite hard to debug without the proper tools to evaluate the cause of the problem.

PSU impact on modules

Some modules are more susceptible to PSU changes than others, modules that feature internal regulators will be less susceptible to PSU voltage, modules that use internal +5v, +/-9v, +/-10v regulators will have more tolerance than modules that use the PSU voltages directly like it is for most cases. Also modules that use voltage reverse protection will already have a 0.3v to 0.8v drop inherent to the protection circuit.

While many digital modules can withstand lower voltages some others will be more dependent on the reference voltage and may show strange behaviours.

This module can help preventing all these situations, it won't fix any problem but can help on the day-to-day monitoring of your system and in keeping your PSU in healthy conditions.

Tech Specs: 4HP/3,5 cm deep
60mA +12V
60mA -12V

Notes: Crossover: enabling new processing possibilities: Commonly, audio crossovers are designed to split an audio signal into several frequency ranges so that each resulting signal is adequate for the speaker drivers they are connected to. Typically, low range is sent to the big woofers, mid range to smaller woofers and high range to the tweeters.

Introducing the ADDAC607, which enables users to split the signal into different bands. This creates many interesting processing possibilities. For example, by independently processing specific frequency ranges, one can add delay on only the high frequency range. Or, users split a signal to feed three different compressors for multi-band compression. Finally, DJs can use the Gain knob as a 'kill switch' to remove an entire frequency band, if desired.

Although ADDAC607 operates in Mono (for Stereo signals two modules can be used) there are two audio inputs, making it easy to achieve stereo to mono summing. The Mono Sum Out carries this summed signal. This is pre-gain and can also be used as a buffered Thru output.

The ADDAC607 is a great companion to the ADDAC220 Dual Envelope Follower+, since it allows extraction of dynamics from any signal in a focused frequency range. This allows it to separate the frequencies of a kick drum and a snare, for instance.

Notes: With the ADDAC304 Manual Gates, you'll be getting 8 manual gates (0 +5v) in a nifty package - a perfect way to perform on and control your modular system.

The ADDAC304 comes with an interesting twist: 4 out of the 8 available gates can act as momentary switches, outputting the signals in their respective inputs when each gate's button is pressed.

MECHANICAL:
Format: Eurorack
Width: 8 HP
Depth: 2.5 cm

CONTROL VOLTAGE I/O:
CV inputs: i 10v
Gate outputs: 0 +5v

ELECTRICAL:
Max current: 10mA

Notes: The new ADDAC320 Servo Control is a nod to Neil Young's Whizzer, a device that was ahead of its time. This tool enabled control over amplifier pots through the use of pedals, resulting in far-reaching tonal variation. Inspired by this methodology, ADDAC's Servo Control incorporates a Servo motor into a 4 HP Eurorack module, enabling it to control any knob that doesn't have a CV input, or other gear such as guitar pedals - within certain distance constraints.

A servo is a specific type of motor that can be digitally controlled to work at precise angles. On the ADDAC320, it is controlled by a microcontroller which is able to receive an incoming CV voltage from 0 to +5v and linearly converts this voltage range to the 270 degree Servo motor range. Using a spring wire and metal couplers, the motor shaft is then attached to the target knob to be controlled, which will turn as the Servo turns.?Two other knobs, Maximum Angle and Minimum Angle, allow further control of the "sweet spot" of the target knob, establishing a smaller Servo range.

Notes: ADDAC809 is a dynamic CV operated I/O router that allows one source (Audio or CV) to be routed through 2 different chains (of one or more modules) before being sent to an output.
Six routing patterns are allowed:

1. IN > OUT
2. IN > CHAIN A > OUT
3. IN > CHAIN B > OUT
4. IN > CHAIN A > CHAIN B > OUT
5. IN > CHAIN B > CHAIN A > OUT
6. IN > > OUT
A practical example is to have an audio source, a delay and a looper.
And the question: should the delay be placed before or after the looper? Sometimes you may need the delay to be before the looper as you may want to sample the audio with the delay or sample the pure audio source and apply the delay afterwards.
This small utility module solves this issue on the fly without having to repatch anything.

INPUTS & OUTPUTS

TO CHAIN B: Connect to your Chain B input
FROM CHAIN B: Connect to your Chain B output
TO CHAIN A: Connect to your Chain A input
FROM CHAIN A: Connect to your Chain A output
INPUT: Connect to your Input Source
OUTPUT: Connect to your Output Source

ROUTING PATTERNS

There are 2 ways to address the six routing patterns:

Buttons: using the frontpanel push buttons and/or dedicated trigger inputs to latch between 2 states.
BYPASS: Chooses between Pattern 1 and any other pattern
PARALLEL: Chooses between Pattern 6 and any other pattern
ORDER: Chooses the order A before B or B before A
DUAL/SINGLE: Chooses to use a Dual (A>B or B>A) or Single chain (A or B)
CV: The dedicated CV input expects a 0 to +5v input and allows to jump to the precise routing pattern using a specific voltage interval in increments of approx. 0.83V:

Pattern 1: 0v to 0.83v
Pattern 2: 0.83v to 1.66v
Pattern 3: 1.66v to 2.5v
Pattern 4: 2.5v to 3.33V
Pattern 5: 3.33v to 4.16V
Pattern 6: 4.16v to 5V

Tech Specs:

Width: 12 HP
Depth: 55mm
Current: 80mA +12V / 30mA -12V

Notes: An exact hardware replica of the Mutable Instruments Ears, which is based on the Music Thing Modular's Mikrophonie.

The ridges on the panel are less defined than on the Mutable version, so the texture is a bit more subtle.

Notes: Two fuzz channels based on the fuzz face circuit with a built-in pickup simulator.

Gnarly is a 7 knob beast that will destroy whatever you throw at it. It has many dead zones in the pots that will adjust based on the position of other pots. It's all about finding the sweet spots and living on those fine edges. The transistor pairs on this section are replaceable.

Oomph is a 5 knob bass friendly take on the fuzz face and compliments the upper harmonics of the Gnarly section.

Pickup simulator - Fuzz circuits offer unique sound when paired with the inductance of the pickup coils in a guitar. This why it is often suggested to have fuzz pedals as your first in a pedal chain. So After Later built-in a coil to simulate your eurorack signal being emitted by a guitar pickup. After Later also included a pickup simulator output so you can use it to interface with other fuzz instruments (pedals, modules, etc.).

As an added oddness - you can also input your guitar into the pickup sim output (just don't plug anything into the normal input). This will still get you Eurorack level output. Please don't input Eurorack levels into the pickup sim output.

Tips - Experiment with the pickup simulator and buffered signal. Use the PS.Level to keep the signal low, borderline on cutting out. You find lots of joy in the gnarly section by keeping this level at the edge.

Width: 10hp
12V: 15mA
-12V: 10mA

Notes: 8 channels of audio or modulation over ethernet. There are two modules and a 3' CAT7e cable to connect them together. There are 8 total channels that are unbuffered and bi-directional. The primary usage is to connect two cases or just send a bundle of signals from one part of your larger case to another. You also get the option of buffering up to four channels on each side. This gives you a local copy of the signal and sends buffered copy to the other module, saving you from having to use a MULT to keep a local copy.

Some notes:

When one side of the Light Rail is in buffered mode, you cannot send signals from the opposite side on those 4 buffered channels (the other 4 channels can still be used in bi-directional mode)

If you are after a different longer/shorter cable, you will get the best performance with CAT7e as it offers the shielding, which is used for the ground.

While the cross channel bleed is minimal, you will notice some very minor cross talk between the channels.

Notes: After Later's first ladder filter is in stereo. You'll get HP, BP. LP2, and LP4 outputs for each side. Please read below on the HP and BP outputs, as they are a bit temperamental.

Along with all of the great traditional sounds of a ladder filter, After Later have added a bias knob which starves ladder transistors of bias current. This can create some fun detuning, glitchy, and warbly sounds. It is recommended that you turn the resonance up slightly in order for it to sound best. Turning the bias will mess with the cutoff frequency and resonance settings so it takes some knob tweaking to master it. There is decent volt/octave tracking for about 3 octaves.

The HP and BP are possible due to pole mixing. When combined with the level control and the resonance it can lead to some atypical behaviours. When keeping the resonance low, and you'll need to manage the level control to get a typical HP and BP responses.

Notes: Rack power bringing 2.5A (2500mA) on both the +12V and -12V rails. There is a 5V rail, but it pulls from the +12V rail, up to 750mA. So only use the +5V rail if you have to.

Comes with 12-position flying bus cable and wall power supply. The wall power supply is the same unit as After Later Audio use on their cases, so there's plenty of headroom and you don't have to worry about memorizing which amperage is for which.

This should be roughly enough for 2 rows of modules in a 104hp case. If you just need power for 1 row, check out our Warp Drive module.

Notes: Rack power bringing 1.25A (1250mA) on both the +12V and -12V rails. There is a 5V rail, but it pulls from the +12V rail, up to 750mA. So only use the +5V rail if you have to.

Comes with 12-position flying bus cable and wall power supply. The wall power supply is the same unit as After Later Audio use on their cases, so there's plenty of headroom and you don't have to worry about memorizing which amperage is for which.

This should be roughly enough for 1 rows of modules in a 104hp case. If you need power for 2 rows, check out The Force module.

Notes: Expander module adds four more assignable CV inputs to Squid Salmple for advanced modulation and sample manipulation. A must for all Squid Salmple owners.

Supplier's Notes:
AXON-1 is a 4HP expander module for the SQUID SALMPLE that provides 4 additional freely assignable CV inputs.

The addition of AXON-1 brings Squid's total number of CV inputs to 7, greatly increasing the possibilities for vast modular sample manipulation.

Each modulation assignment includes digital attenuation and offset and behaves just like Squid's 3 built in CV inputs.

AXON-1 requires firmware 166 or later installed on the Squid Salmple to function!

Notes: 'Beast's Chalkboard' is dual channel stepped voltage source and adder for your eurorack modular synthesizer system. It primarily is intended as a dual octave switcher for VCO's but has many other uses including sequence transposition, FM ratio creation, buffered CV distribution and VCO calibration.

Technical Specifications:

Supply: +/-12V (Reverse voltage & polyfuse protection)
Current Draw: ~30ma
Size: 6 HP
Depth: 22mm (including power header)
Offset Error: +/- 10mV

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


'Beast's Chalkboard' is dual channel stepped voltage source and adder for your eurorack modular synthesizer system. It primarily is intended as a dual octave switcher for VCO's but has many other uses including sequence transposition, FM ratio creation, buffered CV distribution and VCO calibration.

Technical Specifications:

Supply: +/-12V (Reverse voltage & polyfuse protection)
Current Draw: ~30ma
Size: 6 HP
Depth: 22mm (including power header)
Offset Error: +/- 10mV

Notes: The mmMidi is a simple & compact MIDI interface for your Eurorack synthesiser. It translates two independent channels of MIDI note, velocity and gate information to corresponding control voltage signals via either a classic MIDI DIN type connection or as a driverless USB MIDI device.

The mmMidi also converts MIDI Clock to analogue x24 fixed clock and run outputs (i.e DIN Sync). The optional mmT expander provides a third MIDI channel of 8 key mapped gate outputs.

Requiring minimal configuration and a pain free set up, the mmMidi makes it easy to sync Pam's clock to your DAW, control multiple synth voices, and trigger drum or sample modules with the optional mmT expander. The new USB-C connection makes it easy to drive your modular not just from your computer but also via your tablet, phone or any USB MIDI Host.

(Note: New 2025 mkII version adds USB-C functionality.)

Technical Specifications

Power: +12V 50mA / -12V 0mA
Size: 4HP
Depth: 38mm
MIDI response latency: 200-400 uSec
Resolution: Factory calibrated 12 bit 0-8V CV outputs. +5V gates

Notes: Great value from this compact filter module. The Pip Filter is a 12dB/oct resonant design with built-in normalled VCA and a trigger input for pinging. Lots of functionality and creative potential packed into 4 HP.

Supplier's Notes:
Compact Low Pass Filter and VCA

The 'Pip Filter' is a compact 4HP voltage controlled 2 pole low-pass filter with resonance, a 'pingable' trigger input and built in VCA.

Filter cutoff is controlled via both knob control and dual CV inputs with a built in attenuverter.

Resonance is manually controlled and will reach into self oscillation with rough V/Oct tracking.

A trigger input allows the filter to be pinged for percussive plucked type sounds. Finally, a built in VCA (normalled open) allows for additional independent amplitude control of the filtered signal.


Technical Specifications

Size: 4HP
Power: +12V 25mA / -12V 25mA
Depth: 32mm (approx)

Notes: Compact Analogue LFO & VCO

The 'Pip LFO' is a compact 4HP all analogue low frequency oscillator with a wide frequency range, voltage control, numerous outputs, reset input and a VCO mode.

LFO speed is set via a manual control and voltage control input. There is a unipolar square wave output along with both bipolar and uni-polar triangle, saw and sine waveform outputs.

When VCO mode is activated, the frequency jumps to audio range and will track V/Oct for approx 5 octaves. A reset input allows the LFO waveform cycle to be reset and produces hard sync functionality in VCO mode.


Technical Specifications

Size: 4HP
Power: +12V 40mA / -12V 20mA
Depth: 32mm (approx)

Notes: The ‘Pip Slope’ (rev II) is a compact envelope and function generator. It supports both Attack/Decay and Attack/Sustain/Decay type envelopes with both direct and voltage control of Attack and Decay times. Envelope shapes can be morphed between exponential, linear and logarithmic type slopes. Envelopes can be made to loop, repeating infinitely or decreasing with time or amplitude for echo and bouncing ball type effects. An ‘End of Cycle’ trigger output further extends the envelopes functionality for both clocking and burst or fill type effects.

The improved Pip Slope adds a number of new features and updates over the original Pip whilst keeping the same size. Improvements include increased output resolution, finer control of fast envelopes, a new morphing shape control, switchable 5v or 8v maximum envelope level, additional loop modes and an additional trigger output.

Features:
Compact envelope and function generator in 4HP.
Trigger and gate inputs.
Voltage and direct control of attack and release times.
Snappy or super long envelope times – ranging approx 1ms to 7 minutes per stage.
Optional self looping ability with 3 different loop modes: Decreasing amplitude, decreasing time, and regular loop.
Shape control that morphs the envelope shape from logarithmic to linear to exponential curves.
End of Slope trigger output that fires a trigger at the end the envelope or loop cycle.
Selectable 5v or 8v max envelope level output.
Reverse polarity protection.
Skiff friendly.
Designed and Made in the UK.

Technical Specifications
Supply: +12V 30mA / -12V 10mA
Size: 4HP
Depth: 38mm

Notes: PRO Expanders:

Extra Pam Outputs.

ALM034-EX

PPEXP1 & PPEXP2 are two expander modules for Pamela's PRO Workout that both offer additional dedicated fixed clock, Din Sync & MIDI clock outputs.

Extend Pam as a master to clock external gear with super solid dedicated MIDI & Din Sync clock outputs. The Din Sync clock (x24) and Run outputs can also be patched into a 2nd Pam to easily sync it.

Use the extra fixed clocked gate outputs to free up Pam's main outputs for unique sequencing or complex modulation duties.

Connects directly to and is powered by the 'MIDI-EX' expander header on rear of Pamela's PRO Workout.

Only a single output expander is supported at any time but either can be used alongside an AXON-1 CV input expander.

A MIDI adapter cable and a Din Sync adapter cable are both available for connecting to 5 pin 'Din' type connectors. The PPEXP 1 includes a MIDI Din adapter cable.

Technical Specifications

Power: Additional approx +12V 40mA (PPEXP1) / 20mA (PPEXP2)
Size: 4HP & 2HP
Depth: 32mm

Notes: Expandoor

The Expandoor gets you quickly and simply using AMP's Melody Oracle, Star Song, or Touch Tones (as well as other possible future devices) as a CV and Gate controller. It outputs Eurorack-compatible CV and GATE signals, transforming your AMP device into a versatile and novel modular synth sequencer or controller. The Expandoor can be used as a standalone tabletop box, or mounted in a 3U 10HP rack space.

Three independent GATE outputs:

Just as the three "Register" zones on your AMP device gate the audio for the three octaves of the built-in synthesizer, there are three corresponding gate outputs on the Expandoor. The 1/8" jacks labelled "BS" "LH" and "RH" output ~11V DC gate signals whenever those zones are gating "ON" on your AMP device.

CV output, tuners and LED indicators:

The jack labelled "CV" outputs a tuned set of CV values (0-11V), tuned independently but correspondingly, to the set of tuners on your AMP device. The row of multi-turn tuners on the front panel allow fine tuning of each CV state. One tuner is active at a time, depending on the state of the "INTERVAL" zones on your AMP device. The active tuner is conveniently indicated in real time via lights found to the right of the tuners. The indicator lights serve a second function of showing you which tuner on the controlling AMP device is also active in parallel.

AMP LINK jacks

The AMP LINK jack on the bottom left of the front panel (with the arrow pointing IN) connects your controlling AMP device into the EXPANDOOR. Use only shielded CAT 5 or CAT 6 cables and connectors (the correct cables will have metal end connectors). The AMP LINK jack on the right outputs a signal identical to the input, allowing chaining of multiple Expandoors and/or Wave Expanders. Do not plug more than one AMP controlling device into a single Expandoor simultaneously, or damage to the devices could occur.

Each controlling device requires its own Expandoor or Wave Exapnder, but multiple expansion modules can be chained from one controlling device. One potential benefit to chaining expansion modules is the ability to output multiple tuned, corresponding but independent, CV channels. Meaning multiple sets of harmonic values could be tuned and accessed at the command of the single controlling AMP device, or accessed via other modules in your system.

Tech specs:

Input: AMP LINK via shielded CAT5 or CAT6 cable
Power: 12V DC Supplied via AMP LINK
Outputs: 3 Gate (~11V unipolar), 1 CV (variable 0-11V unipolar)
Tuners: 8 multi-turn fine tuners for CV, with indicator lights
Size: 3U 10HP (approximately 5.25" H x 2" W x 1.5" D)

Notes: Inamp is a dual pre-amp in just 4 HPs. Featuring 6,3 Jacks inputs as well as Minijacks.

Both inputs are summed so you can use them at the same time as an input mixer.

The unit is designed to amplify up to x20 the input signal, allowing to amplify most of the music machines out there (Domestic line levels) as well as some guitars (Humbucker-like pickups and so).

The first channel is normalled to second one in series, so it's possible to have two stages of amplification or two separate ones.

Notes: A compact attenuverting (attenuator-inverter) joystick controller and Gate Generator. With it, you can generate and process two control voltages using only one hand. Provided controls for CV ranges and offset adjust the boundaries of your control, this way it never gets out of the desired range, ensuring sensibility and playability even with wild performance gestures.

Specifications

Current needs: +12V: 25mA, -12V: 10mA
Width: 12 HP
Depth: 35mm (including power connector)
Aluminium, heat-treated front panel.
Designed, kits prepared and completed modules assembled in Barcelona.

Notes: Out is a 1U stereo output module designed to convert audio signals from your modular to line-levels. The module is designed to be used on cases with onboard Jack connectors or Intellijel 7U and Palette series, as it uses the same pinout. The module also includes a high-quality Headphone amplifier with an auxiliar monitoring CUE input.

Features:

High-quality Headphones amplifier
Monitoring CUE Input with source selector
Fully compatible with Intellijel 7U and Palette cases rear Jack connectors.
1U Intellijel format.

Specs:

Current needs: +12V: 30mA, -12V: 30mA
Width: 16 HP
Depth: 30mm (including power connector)
Aluminium, heat-treated front panel
Designed, kits prepared and completed modules assembled in Barcelona

Notes: Voltage-controlled lag processor and slope detector

Transforms stepped notes into smooth acid slides with independent speeds for both upper and lower notes.

The onboard slope detector generates gates while the output is rising or falling, allowing events to be activated when moving to upper or lower voltages.

Additionally, it can convert a gate signal into an Attack-Sustain-Release (ASR) envelope.

The shape control feature helps balance speed versus input range, enabling quicker speed while sliding to further notes allowing for time compensated portamento.

Features

Perfect pitch tracking (error < 1 mV)
Independent rise and fall controls
Assignable CV input for rise and fall times
Three selectable speed ranges
Fader-based interface allows for one-handed adjustment of rise and fall times

Specs

Current needs: +12V: 20mA, -12: 15mA, 5v:0 on additional rails
Width: 4 HP
Depth: 25 mm (including power connector)
Designed, kits prepared and modules assembled in Barcelona

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: This is a self contained analogue high hat module. This is a Transistor based VCA design. It is influenced by the DR110 drum machine. The original circuit used 4 oscillators to make the metallic audio sound. I added the original 4 oscillator, and an extra 6 oscillator circuit. The 6 oscillator version is doing a double XOR ringmod (internally). You select that by switch.

The 4 oscillator design sounds more crunchy, where as the 6 XOR circuit sounds more polished with sheen. You can blend in the amount of white noise in the mix labeled 'sizzle'.

Internally, the audio is passing through a few high pass filters, making the output sound very high in frequencies.

The module by itself is not exciting. But in the mix, with other percussion modules, this is your favorite-go-to module. It sits almost perfect in the mix.

There are two triggers. One is for 'Open' sound. The other is for 'close' sound. Both open and close have there own decay knob to adjust the length of the audio tail.

There is a tone control, labeled LPF. Use this to taper off some of the high frequencies.

Instead of adding an 'accent' control. Both triggers have been made to voltage variable. 5V triggering is the normal expected input. So a 3V trigger will sound softer in volume. 10V trigger signals will sound louder.

This module is as simple as it gets, just patch your Arturia Beat Step Pro and use the drum track.

Features

-Both trigger inputs are voltage variable. You can get softer audio, with softer trigger voltage.
-2 voice metallic noise generator
-2 decays (open and close)
-2 Flavors select by switch.
-Normal mode, and Sustain mode, selected by switch.
-frequency adjustment of the internal XOR ringmod.
-classic roland sounding transistor based VCA.

Why get this module over the Shimm module, or other high hats modules?

-Ease of use, ready to go. No sound exploring needed.
-Want the classic transistor based, crunchy sound.
-lower budget
-Sits very well in the drum mix.

Dimensions
8 HP
32 mm deep

Current Draw
21 mA +12V
13 mA -12V

Notes: What does this do?

This is an analogue filter based on the 1974 SEM filter. The original early design did not self oscillate into a sine wave. This one also does not self oscillate. The sound, however, makes up for that. You get the original notch sweep, and incredible band pass mode at such a low friendly price.

Added Features

-Onboard VCA
-Onboard envelope generator (decay)
-Variable trigger input circuit. Emulates a Vactrol.
-Dual audio input possible

Width: 10HP
Depth: 1 PCB stack, skiff compatible

Notes: Capt'n Big-O is for people who like big massive analogue sounds-. 100% analog components, no oscillator on a chip here.

Width = 14hp

Depth = 26mm

100% analog, original design (not an oscillator on a chip)

Waveforms - sine, triangle, saw, and square

Wave folder/waveshaper - routed by default to sine but patchable to any waveform or external source

Drive circuit - essentially a 75x overdriven VCA (5V output)

Linear and exponential frequency modulation (FM)

Hard sync

Pulsewidth modulation

120mA power draw when running +12V rail

108mA power draw when running -12V rail

Frequency range of oscillator: full range - LFO through audible spectrum

Input voltage range of oscillator = -10V to +10V

Notes: Mutes goes above and beyond basic muting by allowing you to split groups of signals to multiple destinations, making it great for FX dub performing and varied signal routing.

Vactrols on the circuit gives to the switching a pleasing decay for both audio and modulation as well a totally click free muting.

Three-position switch: MOMENTARY signal pass-through (it springs back to the center when released); OFF (or muted) in the center; and ON to the right.

Notes: Add-on for the Krait module.

Ewa was created as a lovely partner for the Krait module, a syncable 3-channel modulation source. Paired with Ewa, Krait will get new useful abilities, such as 3 freely routable cv inputs, endless encoder for smooth editing without value jumps, dedicated clock menu button and clock and reset outputs.

Each CV input can be used to record external cv source in Record mode. Beside that you can route any input to any parameter of the LFO and Random too. With Ewa now it is easy to modulate LFO rate or Random slew for example. CV inputs are bipolar and react to the signals between -5 +5 voltages.

Additionally a dedicated clock menu button and clock output can make Krait as a clock source for other modules in your system that need sync.

Technical details

4 hp

20 mA +12V

12mA -12V

0 mA 5V

42 mm deep

CV input voltage ranges: +5-5v, 0v+5v

To use Ewa, you need to install firmware 2.0 on Krait.

Notes: A Low Pass Gate (LPG) can be a low pass filter, a VCA or a combination of both. This means both the harmonic content and volume can be controlled simultaneously which resembles the behaviour of many instruments: the louder, the more harmonics.

The A-101-2's mode of operation is set with a switch: left position is low pass, right is VCA and the combo mode is in the centre. Alternatively, you can activate the modes with gate signals which is the reason for two gate inputs; this is very interesting in combination with clock dividers or trigger sequencers.

- Gate 1 high & gate 2 low = low pass mode
- Gate 1 low & gate 2 high = VCA mode
- Both Gate 1 & 2 high = combo mode

The A-101-2 has an aggressive sound, compared to other LPGs and its resonance goes up to self-oscillation which not many LPGs offer. The oscillation is rather dirty and far from being a sine wave.

3U Eurorack module, 8HP wide, 50mm deep.

Notes: A-101-6 is a new filter module that uses so-called opto FET's to control the filter frequency. Opto FET's are very similar to Vactrols, but use light dependent field effect transistors (FET's) instead of light dependent resistors (LDR's). An opto FET is a combination of a light-dependent FET and an LED, both put into a small light-proof case. The advantage, compared to vactrols, is a much faster response of opto FET's compared to LDR's - this allows much faster attack/decay times and even FM effects.

The variable resistors corresponds to the opto FET. The brightness of the Opto FET LED's, and consequently the filter frequency, can be adjusted manually (Frequ. control) and controlled by means of an external control voltage (CV) with attenuator. The LED at the front panel reflects the LED brightness inside the opto FET's.

The type of filter is chosen by jumpers on the PC board (factory setting: low pass). The type of filter determined by the jumpers positions can be marked by means of a water-resistant felt pen at the front panel.

The resonance is controlled by the Feedback control up to self-oscillation. By means of a trimming potentiometer the maximal feedback can be adjusted. High feedback values can be used mainly in the all-pass mode to obtain very extreme self-oscillation sounds. Even an external feedback signal can be used instead of the internal feedback connection (FB In socket). Whenever the filter type is changed by means of the jumpers the trimming potentiometer for the maximal feedback has to be re-adjusted.

The Mix control is used to pan between the original signal (CCW position) and the effect signal (CW position). In filter mode (LP/HP) this control is usually set fully CW. In the all-pass modes one obtains phasing sounds at centre position or "pure" all-pass sound in fully CW position.

Notes: Module A-101-8 is a 8-stage phase shifter which uses light-sensitive resistors (LDR) and is a replica of the Compact Phasing A manufactured by the company Schulte in the seventies. The actual phasing circuit is identical to the historic model. Only the illumination control of the LDRs is different: the A-101-8 uses LEDs to illuminate the LDRs, the historic model used incandescent miniature lamps. And the A-101-8 has no built-in LFO but can be controlled by any external control voltage source (e.g. LFO, ADSR, random, Theremin, ribbon controller, sequencer, midi). The phasing offset (i.e. the base value for the phase shifting) and the modulation depth of the external control signal can be adjusted separately. The Compact Phasing A had no offset control but only a depth control for the built-in LFO. Feedback and mixing ratio of the output signal are set by two controls. The audio input is equipped with an attenuator. The module has two audio outputs available (same as the historic model) and a visual display of the phase shifting.

The module has these controls and in/outputs available:

Control Man. : manual control of the phase shift offset (base value)

Control CV: attenuator for the signal applied to the CV socket

Control Feedb.: Feedback or Resonance (similar function as filter resonance/feedback/emphasis)

Control Mix: sets the mixing ratio between original and phase shift signal appearing at output 1

fully CCW: only the modified input signal appears at output 1 (see note below *)

center: a mixture between the modified input signal and the phase shift signal appears at output 1, that's the standard position for the classical phasing effect

fully CW: the pure phase shifted signal appears at output 1 (e.g. for vibrato effects)

Control Input Level: attenuator for signal applied to the In socket

Socket In: audio input

Socket CV: control voltage input

Socket Out 1: audio output 1 (mix signal)

Socket Out 2: audio output 2 (modified input signal)

LED: visual control of the phase shift

The module has some peculiarities (same as the historic model):

The input signal is processed at first by a pre-stage which outputs a "modified" input signal (*). This signal is not processed by the phase shift stages but is affected by the feedback setting. Only when feedback is set to zero this signal is identical to the input signal. Otherwise it contains feedback components.

This signal is output on socket Out 2.

When both output sockets Out 1 and Out 2 are used as stereo channels one obtains a spatial stereo sound effect.

The same signals is also used for the CCW position of the mix control. With mix control fully CCW the unmodified signal appears only if the feedback control is set to zero. Otherwise it contains feedback components.

The historic model had two audio inputs: one 5-pin DIN socket and a 1/4" jack socket. The DIN socket was intended for high-level line signals. When the 1/4" jack socket was used the amplification of the pre-stage increased by about 100. The 1/4" jack socket was intended for low level signals (e.g. electric guitars or microphones). For this feature the A-101-8 has an internal jumper that can be used to increase the amplification. As long as the module is used within the A-100 system usually the lower amplification is used to avoid distortion.

The 8 photo resistors and LEDs are assembled within an small lighproof box. In addition the pc boards are made of lighproof black material to avoid interfering light from other modules or the bus board.

Dimensions
4 HP
45 mm deep

Current Draw
30 mA +12V
30 mA -12V

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-124-2 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").

The A-124-2 is the Slim Line version, which is only 4hp wide.

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.

Dimensions:
4 HP
20 mm deep

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.

Width: 4 HP / 20.0 mm
Depth: 45 mm (measured from the rear side of the front panel)
Current: +30 mA (+12V) / -30 mA (-12V)

Notes: Module A-130-8 contains eight linear voltage controlled amplifiers (VCAs). Each VCA features a control voltage input (CV), a signal input (In) and a signal output (Out). In addition three mixers are included: the socket labelled "1-4" outputs the sum of the VCAs 1-4, the socket labelled "5-8" outputs the sum of the VCAs 5-8, the socket labelled "1-8" outputs the sum of all eight VCAs.

The signal inputs are able to process levels up to about 20Vpp without clipping (20Vpp = 20V peak-to-peak or about -10V...+10V) . Each CV input is equipped with a trimming potentiometer that is used to adjust the sensitivity of the CV input in question. In the factory the module is adjusted for the CV range 0...+5V but can be re-adjusted by the user for other control voltage ranges (e.g. 0...+10V).

The amplification range for each single VCA is 0...1. The signals of the sum outputs have a lower amplification to avoid distortion at the sum outputs.

The VCAs and mixers are fully DC coupled, i.e. the module can be used for the processing of both audio and control voltage signals. The control voltage and signal inputs can be normalled by means of small solder pads (e.g. 1 > 2 > 3 > 4 and so on, or 1 > 5, 2 > 6, 3 > 7, 4 > 8 for the stereo application mentioned below).

Typical applications

any kind of VCA application (e.g. voltage controlled attenuation of audio or control voltage signals)
two voltage controlled mixers with four channels each
voltage controlled stereo mixer with four channels each, for this the control voltage inputs have to be correspondingly patched or internally normalled: CV1=CV5 /CV 2=CV6 / CV3=CV7 / CV4=CV8
voltage controlled mixer with eight channels
add-on for the Joystick module A-174-4
Technical notes

The following document shows the positions and functions of the jumpers and trimming potentiometers of the module: A130_8_trimming_potentiometers_and_jumpers.pdf
When the trimming potentiometer in question is moved CCW (counterclockwise) the sensitivity of the CV input in question increases (view to the top edge of the module).
Trimming procedure: apply the max. CV voltage that will occur in your application (e.g. +8V) to the CV input and a constant audio signal to the audio input (e.g. a VCO sawtooth). Then adjust the trimming potentiometer in question until the max. output level is reached and does not become higher even if the trimming potentiometer is turned further. Possible the the trimming potentiometer has to be turned back again a bit to find the correct position.
With the trimming potentiometer adjusted to max. sensitivity the linear amplification starts at about +0.1 control voltage (CV). We introduced this small dead range of about 100 mV to make sure that the VCA fully closes with CV = 0V.
It's possible to change the amplifications of the internal mixers used for the sum outputs (1-4, 1-8, 5-8) also to 1. Pay attention that then clipping/distortion may occur at the sum outputs. For this the 22k resistors R41 (Sum 1-4), R44 (Sum 5-8) und R51 (Sum 1-8) have to be replaced by 47k. As they are smd resistors sufficient experience with soldering/desoldering of smd parts is essential. And we have to point out that warranty is void if such modifications are carried out by the customer. The positions of the resistors are shown in the document A130_8_trimming_potentiometers_and_jumpers.pdf.
If multiple exponential VCAs are required module A-132-4 is recommended.

Width: 6 HP / 30.1 mm
Depth: 40 mm (measured from the rear side of the front panel)
Current: +50 mA (+12V) / -50 mA (-12V)