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Notes: Clk is a voltage controlled clock generator with all the features a master clock needs. It has an extremely wide range from ten seconds between pulses well into audio rate. In addition, the pause button and CV input provide an expressive feature that is all too often missing in a modular setup. Stop using LFOs or other modulation sources for your master clock, and let Clk do what it's best at.

Notes: AVert is a dual attenuverter. Each channel offers the ability to attenuate and invert any input signal. The signal present at channel one is normalled to channel 2, allowing for two unique output signals from a single input. Get Inverted.

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: TM is a probabilistic random sequence generator based on the research of Alan Turing. His Turing machine was a mathematical model of computation that could, in theory, create any output based on a set of instructions and input variables. In a similar way, the TM chooses random values for steps in a sequence based on the user's probability settings. By manipulating probability and sequence length, the module can generate an infinite number of sequences. Whether you're looking for a controlled random source, or an evolving melody generator, TM has you covered.

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: The 2hp Buff is a buffered multiple capable of splitting an input signal to multiple outputs. Due to its active architecture, inputs retain their full integrity as they are copied to multiple destinations. One input signal can be copied to six outputs, or two inputs can be copied to three outputs each. The Buff is especially great for splitting pitch or audio signals where signal integrity is critical. Keep your signals in shape with Buff.

Notes: ***B-STOCK: Without original box, product has light surface marks but otherwise in perfect working condition.***


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: Euclid is a rhythmic pattern generator based on ideas originally presented by Euclid, the Greek mathematician. The Euclidean algorithm can be adapted to create rhythms by taking the total number of active steps in a sequence, and then distributing them across the entirety of the pattern.

This creates cyclical rhythms that are immediately musical and can be used for everything from EDM to IDM. Bring your patches full circle with Euclid.

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: Great for generating random voltages from white noise, arpeggios from sawtooth waves, and downsampling audio signals.

Notes: The Buff Mult is a buffered multiple with LED indicators to show positive and negative voltages. Using wide bandwidth opamps, it functions as a dual 1-to-3 or a single 1-to-6 mult for audio, video, or CV signals.

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: Navigator is a compact, multi-use voltage utility designed to bring playable control to CV sources in your rack. The combination of normalled voltages and mixing allows you to attenuate, polarize and offset signals to modulate parameters exactly within the sweet spot of another module's CV input. Navigator is a compact, multi-use voltage utility designed to bring playable control to CV sources in your rack. The combination of normalled voltages and mixing allows you to attenuate, polarize and offset signals to modulate parameters exactly within the sweet spot of another module's CV input.

Details:

4hp

25mm deep

11 mA on +12V, 8 mA on -12V, 0 mA on +5V

Notes: A Comparator is an electronic circuit that compares two voltages and switches its output to indicate which is larger. The Comparator operates between -10 or +10V

The Output is always -10V if below Threshold and +10V if above Threshold.

A Rectifier is an electronic circuit that is used to transform AC signals to an equivalent DC signal while removing one of it's polarities, i.e. Positive rectification excludes negative signals and vice-versa.
Both sections can be used to change the shape of any waveform as well as its harmonic content.

FRONTPANEL:
1 Comparator Threshold Knob
1 Comparator Jack Output
2 Comparator Monitor Led1 Common Signal Jack Input
4 Rectificated Outputs

MECHANICAL:
Format: Eurorack
Width: 4 HP
Depth: 2.5 cm

CONTROL VOLTAGE I/O:
CV inputs: i 10v
CV outputs: i10v

ELECTRICAL:
Max current: 30mA
Compatible with +-12v and +-15v power supplies
Bus Board Cable: 8 × 2 IDC (Doepfer style) connector

Notes: The ADDAC213B is the second pair of modules from ADDAC's Eurorack Bridge system.

A pair of ADDAC213Bs can be used in standalone to send/receive 8 CV or audio signals between different points inside the same case or as an expansion to the main pair of Eurorack Bridge modules, the ADDAC213As.

Two ADDAC213B modules can be connected to each other with the use of a single ribbon cable and then used inside a case to carry signals between distant points without the need for long cables. Less clatter, less spaghetti- more space of your fingers on those knobs!

ADDAC213Bs always come in pairs. A single pair can send & receive up to 8 CV or audio signals between different points in your case at the same time. The modules can be installed in normal position or a 180 degree position to fit any need.

As an Expansion to an ADDAC213A.

Each ADDAC213B connected to the backside of an ADDAC213A adds 8 more channels to the main bridging functionality of the ADDAC213A.

Up to 2 ADDAC213B can be connected to an ADDAC213A module, expanding the bridging between two difference cases to a total of 24 channels.

If you're looking for a simple one-cable bridge between your various cases, then look no further than the ADDAC213A.

Between the ADDAC213A pair and the ADDAC213B, your cases never looked so elegantly connected together!

Each module can be installed in normal position or at 180 degrees.

Comes with a 50cm ribbon cable. Custom sizes are available upon request.

Mechanical:
. Format: Eurorack
. Width: 3 HP
. Depth: 2.5 cm

Electrical:
Passive / Does not draw current
Ribbon Cable: 50cm or 100cm ribbon cable

Notes: Passive dual expression pedal attenuator.

Plug any CV or audio source through it and control its amplitude through any standard expression pedal.

Invert switch for inverting the expression pedal action.

Specs:
- Passive Module
- Width: 4 HP
- Depth: 3 cm

Notes: Dedicated expansion for the ADDAC807C VC Summing Mixer

Features 4 individual track post fader stereo outputs.

2Hp
2 cm deep
0mA

Notes: This is a new revision of one of ADDAC's first modules, back from 2010.

Now more compact in 6hp and with an Offset CV input.

The incoming signal amplitude is controlled by a [GAIN] attenuverter circuit allowing to attenuate the signal as well as invert its phase.
A back jumper can set the maximum gain amount to either x1 (unity gain) or x10. DIY modifications can be made by changing its resistors.
After the Gain an offset can be added to the signal, displacing the signal up or down (-5V to +5V) this can be adjusted using the [OFFSET] knob and CV input

When using no input using the [OFFSET] knob and CV input will generate an output between -5V and +5V.

Tech Specs:

6HP
2.5 cm deep
40mA +12V
40mA -12V

Notes: Following ADDAC System's T-Networks series, the importance of having the right input signal for firing drum modules or envelopes was realised. Gates and Triggers are often looked at as similar signals but at times it really makes a difference and results will change drastically depending if a Gate or a Trigger is fed to the input of such modules.

This led to the simple yet effective Gate to Trigger.
A four channel converter with bypass switch for each channel.

Any input Gate will be limited to a 1ms Trigger.

Tech Specs:
3HP
2.5 cm deep
10mA +12V
10mA -12V

Notes: ADDAC309 CV to Expression allows a simple and straight forward connection between modular and effect pedals that features expression pedal TRS inputs.

Instead of using an expression pedal into the effects pedal the user can use this module in between a CV source and the Effects pedal to be controlled.

This is a great way to control the available parameters on the effects pedals straight from a CV source.

ADDAC309 features 2 channels each with a CV Input with attenuator and a 1/4" jack output.

This is a passive module, the power needed for operation is taken from the pedal power instead of the modular frame, this allows for perfect matching of the pedal's operating voltage which can range from 3.3v to 9v.

Tech Specs:
4HP
3,5cm deep
Passive module

Notes: Morcom Expander for micro Turing Machine (Alan)

An expander for After Later's Alan module (a smaller version of the Turing Machine) that exposes the pulse outputs from the main Alan module. You get 7 seven random outputs and then 4 that are derived from other 7 outputs. When 1 and 2 are high then the 1+2 outputs is high. You can get some great rhythmic effects using these in conjunction with the main stepped CV output.

The module comes with the required cable to connect to the main module. The panel is designed to compliment Alan, After Later's micro version of the Turing Machine.

The module comes with a 1 year warranty.

Notes: SHTH - Sample and Hold - Track and Hold

Create stepped outputs using two different classic synthesis techniques, sample & hold and/or track & hold.

Sample & Hold

The top four jacks make up the sample and hold section. There is a noise output that is normalled to the input so you can pass a gate/trig signal into the SAMP input to get a stepped output at the OUT jack.

IN - Signal that will be sampled, normalled to NSE output
SAMP - When high updates the voltage being sent to the output
NSE - White noise output
OUT - The sampled output (freezes the value from the IN jack when the SAMP jack receives a high signal)

Track & Hold

The bottom four jacks make up the track and hold section. There is a walk signal (a randomish meandering voltage) that is normalled to the input. Track and hold is the opposite of sample and hold in that it will pass the IN value to the OUT jack until the TRACK input receives a high gate. While the TRACK input is high it will hold the value. After the TRACK input goes low, it will begin tracking the IN signal again.

IN - Signal that will be tracked
TRACK - When high the value will be held at the output
WALK - A meandering voltage
OUT - The track output (follows IN while TRACK is low, held voltage while TRACK is high)

Notes: Enigma Expander for micro Turing Machine (Alan)

An expander for After Later's Alan module (a smaller version of the Turing Machine) that enables you to manipulate the stepped CV sequence. This enables you to create a different, yet related sequence to the main Alan output.

The module comes with the required cable to connect to the main module. Our black and gold panel is designed to complement Alan, Aftter Later's micro version of the Turing Machine.

The module comes with a 1 year warranty.

Notes: The 3:1 Mixer has two section of 3 inputs to a single output. Each input will be mixed at 1/3 of the level of the input. Each section has an LED indicator indicating activity on the output. Section 1 is normalled to section 2 so it can easily behave as a 6:1 mixer as well.

Width: 2HP
12V: 30mA
-12V: 30mA

Module power connector can be connected either way.

Notes: An interface for the case 1/4" jacks in Intelljel cases. The jacks are marked as if they are part of the case, so the jacks marked out, require an input.

The module sports both input and output for either a consumer line level (0.447Vpk) or a professional line level (1.095Vpk). These levels are controllable via jumper on the back of the module. It can also have a single input and output channel switched to pedal level. The case output is fed to the headphone amp that has a corresponding level control. The module otherwise does not have any level control and relies on using a VCA or other module to perform any level controls.

The module can essentially be run in one of three modes:

1) Stereo line level in and out

2) Stereo line level in and out via the left side and mono pedal in and out on the right side. In this mode the stereo line levels leverage TRS on the 1/4" jacks. You can use the included 3.5mm couplers to get TRS on the 3.5mm side.

3) Mono line level in and out via the left side and mono pedal in and out on the right side.

For Palette 64hp users only have two 1/4" jacks. You can choose if you want to use the case jacks as either inputs, outputs, or one input and one output.

Notes: Two channel USB module.

Standard Mode - Send two channels into your USB device and receive two channels from USB.

Insert Mode - Send two channels to your USB device and get a copy of the sent signal in the outputs.

Toggle between the modes via a pair of jumpers on the back. The USB-B to USB-A cable is provided with the module. Why use the cutting edge USB-B? I felt the jacks were way more sturdy than mounting USB-C jacks vertically.

Expandable - Bartender, Barbacks, DVCA, Cast Iron, Mingles, and USB-2CH can all be connected with Dupont cables (aka female to female breadboard cables) via pin headers on the back of the modules. Connecting the in and out pins will send/receive the audio into the next module.

Width: 4HP
12V: 10mA
-12V: 10mA

Notes: A simple VC panner with CV-controlled level. The left input normals to the right input to give an easy way to add panning to a mono signal.

Expandable

Bartender, Barbacks, DVCA, Cast Iron, Mingles, and USB-2CH can all be connected with Dupont cables (aka female to female breadboard cables) via pin headers on the back of the modules. Connecting the in and out pins will send/receive the audio into the next module.

Width: 4hp
12V: 40mA
-12V: 40mA

Notes: This is a buffered/active mult with LED indicator. You get two channels of 1 to 3 multiples within a 2HP module. The output of channel 1 is normalled to channel 2 so it can also be treated as a 1 to 6 multiple as well.

Active vs Passive mults:

With a passive mult you are effectively just plugging multiple things into the same jacks. This will often cause some voltage drop in each of the signals. With an active (or buffered) mult you will not get any voltage drop from the original signal.

Comes with a black and gold panel, power cable and one year warranty.

Usage note:

The red stripe of the power ribbon cable goes towards the top of this module.

Notes: Mult 1U Intellijel Format

This is a buffered/active mult with LED indicator. You get two channels of 1 to 3 multiples within a 2HP module. The output of channel 1 is normalled to channel 2 so it can also be treated as a 1 to 6 multiple as well.

Active vs Passive mults:

With a passive mult you are effectively just plugging multiple things into the same jacks. This will often cause some voltage drop in each of the signals. With an active (or buffered) mult you will not get any voltage drop from the original signal.

Comes with a black and gold panel, power cable and one year warranty.

Usage note:

The red stripe of the power ribbon cable goes towards the top of this module.

Notes: AJH Synth have had quite a few customers asking if we can make the gain jumpers on the MiniMod VCF and VCA modules accessible from the front panel, so this 2HP module aims to address this.

The Gain Switch Multi has two switches which connect to the gain jumpers on the VCA and VCF. Switch "up" is the same as having the gain jumper in place, switch "down" is the same as removing the jumper, and gives higher gain.

Using these switches gives a similar effect to the old "headphone out to external input" trick on the original Model D but with a much wider overdrive range, particularly from the VCA.

As an added bonus, AJH Synth have also included a six way passive multi.

Notes: The 'HPO' is an affordable super slim and skiff friendly no frills stereo headphone driver output for your modular synthesiser. Includes a volume control and ability to double up a mono signal into stereo. A great use for that left over 2hp in a skiff or larger system.

Give loved ones, friends and acquaintances a break from your musical 'genius', the HPO offers a solitary cell for focused creativity impregnable from undeserving non-believers.

Notes: 'O/A/x2' is a dual channel attenuverter with each channel also including a bipolar voltage offset and LED monitoring. The module is primarily intended for fine grain flexible 'editing' of control signals (i.e changing the phase, level and DC offset of an LFO signal) but also has uses with audio signals such as attenuation, inversion and mixing.

Technical Specifications:

Supply: +/-12V (Reverse voltage protection)
Current Draw: ~50ma
Size: 4 HP
Depth: 32mm (including power header)

Notes: The 'Stereo Sum' is a unity gain summing mixer that features four stereo input pairs summed as pairs to two independent mix outs or all as a single combined mix. It is a useful utility for efficiently combining outputs of multiple stereo sources, such as the MEGA-TANG and Jumble Henge mixers or multiple MFX returns. The inputs accept stereo or mono signals (via normalisation) which can be audio or CV (module is DC coupled) and the top mixer's outputs are normalised to the bottom mixer section meaning if the upper output is left unpatched the two upper inputs will be added to the lower output.

Stereo input pairs

Stereo inputs. Can be used with audio or CV (inputs are DC coupled).

Left ins normalised to Right for mono signals.

Stereo mix output 1

Stereo mix output. Normalised to bottom mixer section if ouput is left unpatched.

Stereo input pairs

Stereo inputs. Can be used with audio or CV (inputs are DC coupled).
Left ins normalised to Right for mono signals.

Stereo mix output 2

Final stereo mix output.

Technical specifications

Power: +12V 8ma / -12V 8ma
Size: 4HP
Depth: 32mm

Notes: The 'S.B.G' is a compact utility module intended for the interfacing of guitar effect pedals with your eurorack modular system.

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

Technical Specifications:

Supply: +/-12V (Reverse voltage protection)
Current Draw: ~30ma
Size: 4 HP
Depth: 22mm (including power header)

Notes: The mmT is an optional 3HP expander which connects directly to the expand socket on the rear of the mmMidi using supplied cable.
It maps the third configured MIDI channel key presses to corresponding trigger/gate outputs as shown on the mmT front panel.
It's useful for controlling drum modules and in particular the ALM Squid Salmple.

Dimensions
3 HP
38 mm deep

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

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: Expand your Eurorack system with the 2HP wide VCA, which offers maximum sound control despite its minimalist size. This highly flexible Voltage Controlled Amplifier is the perfect addition to any modular setup, designed to add depth, dynamics, and nuanced expressiveness to your sounds. Whether you're a seasoned modular enthusiast or a newcomer to the world of synthetic sound shaping, this VCA will impress you with its performance and versatility.

Ultra-compact design

With a width of only 2HP, this VCA fits seamlessly into any Eurorack setup and optimizes the available space for maximum creativity.

A standout feature of this VCA is the ability to manually switch between a linear and a logarithmic characteristic. This feature allows you to fine-tune the VCA to meet the needs of your sound design, from smooth, smooth fades to dramatic, exponential changes.

Use the VCA for a wide range of applications, from simple volume control to shaping dynamic amplitude modulations. Its flexibility makes it the ideal tool for experimental sound research as well as classic synthesizer sounds.

Intuitive operation

Despite its advanced features, the VCA remains intuitive to use. Switching between characteristics is straightforward, so you can focus on experimenting with your sounds.

Perfect for any setup

Whether you're in the studio or on stage, this VCA is a must-have for anyone looking to expand their sonic palette and refine control over their sounds. Its robust construction and reliable performance make it a trustworthy partner for all musical endeavors.

Notes: Discover the new dimension of your sound design with the ultra-compact 2HP wide ADSR Envelope Generator in Eurorack format. This precise tool is specially designed for synth enthusiasts who don't want to miss out on professional dynamic control in their Eurorack system. Despite its small size, this ADSR generator offers a plethora of features that will take your soundscapes to the next level.

Compact design

With a width of only 2HP, this envelope generator fits seamlessly into any Eurorack setup without wasting valuable space.

Customise your sounds with full ADSR control - Attack, Decay, Sustain and Release can be intuitively adjusted to bring your sounds to life

There is also a built-in LED display that gives you real-time visual feedback on the current phase of the envelope. This way, you always have an overview of the dynamic progression of your sounds.

With the ability to choose between three timebase settings (S, M, and L), you can flexibly adjust the envelope time base to suit your musical needs. From fast, crisp pulses to long-drawn-out, atmospheric evolutions, expand your expressive possibilities.

Manual Trigger

A special highlight is the manual trigger button. This allows you to trigger the envelope independently of external signal sources, ideal for spontaneous performances or experimenting with new sound ideas.

Dimensions
2 HP
42 mm deep

Current Draw
15 mA +12V
5 mA -12V
0 mA 5V

Notes: The CubuSynth Dual Vintage VCA is a nice sounding, zero bleed, analog Voltage controlled amplifier based on the LM13700 Dual OTA. It can work as two independent VCAs or as a stereo unit, and CV input 1 on channel 1 is normalized to the CV input 1 on channel 2. (same signal can control both Channels).

The Original concept is designed by Tom Wiltshire aka "Electric Druid". For more information visit:

https://electricdruid.net/design-a-eurorack-vintage-vca-with-the-lm13700/

1 LEVEL
Sets the Amplitude for each channel.

2 CV AMOUNT
Attenuates the Control voltage from CV input (3)

3 CV
CV input for the amplitude Modulation. The input on channel 2 is
normalized from CV on channel 1 when nothing is plugged in.

4 CV2
A second CV input for amplitude modulation, without attenuator

5 IN
Input for Audio Signal

6 OUT
Output for the Audio Signal

Dimensions
8 HP
25 mm deep

Current Draw
9 mA +12V
9 mA -12V

Notes: The CubuSynth 6xLevel module is a 8hp passive Attenuator, which allows scaling of CV and audio signals. The inputs are normalized from the outputs above, which allows passive multiplication with attenuation. The normalized path is attenuated by the potentiometer before, so you can also create very subtle changes (e.g. Fine tune a VCO).

The white lines on the Front panel mark the normalisation routing.

Dimensions
8 HP
12 mm deep

Current Draw
Module does not draw current

Notes: Module A-115 is a four-way frequency divider. The frequency of a signal at the input is halved (half frequency = first sub-octave), quartered (1/4 frequency = second sub-octave), and so on. In this way, the DIVIDER produces four sub-octaves (F/2 down to F/16).

At the output, the A-115 produces a summed mix of the original and the four sub-octaves. There are attenuators to control the amount (i.e. Amplitude) of the original signal and each of the sub-octaves.

Bear in mind that the sub-octaves output by the A-115 are all true square waves. At the output there are always four square waves and the original signal available.

Notes: Module A-151 (Quad Sequential Switch) is like an electronic four-position rotary switch.

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

Four LED's indicate the active in/output (ie. the one that is connected to the out/input at any particular time).

Notes: Module A-124 is a special 12dB multimode filter using the "strange" filter circuit of the "EDP Wasp" (an analog synthesizer with black/yellow case built end of the seventies, manufactured by the UK company "Electronic Dream Plant" with Chris Huggett und Adrian Wagner). This design "abuses" digital inverters as analog operational amplifiers leading to distortions and other "dirty" effects that generate the specific sound of this filter. The filter is equipped with a band pass output and a combined low/notch/high pass output. For this output a control knob defines the relation between low and high pass signal. If both signals appear at the same level (i.e. middle position of the Mix knob) one obtains a notch filter. Otherwise the low or high pass signal predominates. The module does not feature self-oscillation in contrast to most of the other filters of the A-100 system.

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

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

- 3U Eurorack module, 8HP wide, 45mm deep
- Current draw 30mA

Notes: Module A-148 (Dual S&H) has two identical sample & hold modules, designed to produce 'staircase' voltages. The signal present at the sample input is sampled at a rate set by the signal at the trigger input, and held at that voltage at the S&H output.

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

Two LEDs for each S&H indicate the voltage (positive or negative) of the sampled signal.

Notes: Module A-182-1 is a simple passive multi-connector similar to the multiples modules A-180-1/A-180-2. In contrast to modules A-180-1/2 each socket is equipped with a 3-position switch that allows to connect the corresponding socket to the internal bus #1 (left position), bus #2 (right position) or to turn the socket off (centre position).

Examples:

- All switches in left position or all switches in right position: 8-fold multiple

- Four switches in left position and four switches in right position: two 4-fold multiple

- X switches in left position, Y switches in right position and Z switches in centre position: two separate multiples with some sockets turned off

Notes: Module A-184-2 is the combination of two functions and planned primarily as an expansion module for VCOs or LFOs (e.g. A-110-1, A-110-2, A-145, A-147-2).

Triangle-to-Sine Waveshaper:

The upper section is a very precise triangle-to-sine converter (thanks to Tim Stinchcombe who recommended this circuit). It can be used to convert any triangle waveform into a (nearly) perfect sine. The converter is much better than the simple diode converter used in the A-110-1, A-111-1, A-145 and A-147-2. Two trimming potentiometers are used to optimize the sine shape. The converter should be assigned to one VCO or LFO because the trimming potentiometers have to be re-adjusted if the input level or DC offset of the input signal changes. If the trimming potentiometers are deliberately mis-adjusted it can be used also as a waveshaper for non-sine waveforms (e.g. sine-shaped at the top of the signal and a peak at the bottom, even voltage controlled by applying an additional voltage to the waveshaping circuit, "circuit-bending" notes will be available).

The waveform converter is DC coupled and can be used also for low frequencies (e.g. LFO triangle waves).

Voltage Controlled Crossfader:

The lower section is a voltage controlled crossfader. It has two inputs A and B. The two signals are mixed together with variable percentage. When the manual control CF is fully CCW only signal A appears at the CF Out socket. When the manual control CF is fully CW only signal B appears at the CF Out socket. In the centre position of the manual control both signal appear with the same level. In addition a control voltage input CV with attenuator is available to enable voltage control of the crossfade.

Two LEDs display the crossfading shares of input A and B.

The crossfader uses two high quality VCAs (SSM2164). Inputs and outputs are DC coupled. Consequently it can be used for audio signals and slowly varying control voltages as well.

The sockets of the upper section (triangle and sine) are normalled to the inputs A and B of the crossfader section. That way the crossfader is used to fade between triangle and sine of the VCO or LFO connected to the waveshaper. If other signals are plugged into the input sockets A and B these signals are used for crossfading.

The main application is to fade between two different waveforms of a VCO or LFO or two different VCF outputs. But the module can be used for any other signals too as the waveshaper and crossfader sections are independent apart from the normalled sockets.

Notes: Module A-143-9 is a derivative of our planned thru-zero quadrature VCO. It is a voltage controlled sine LFO with 4 outputs. The phase shift between the outputs is 90 degrees. The sine shifted by 90 degrees is also called cosine, the sine shifted by 180 degrees is nothing but the inverted sine, and the sine by 90 degrees is nothing but the inverted cosine.

The frequency range is from some minutes to frequencies beyond audio with three ranges selected by a toggle switch:

- Switch position H: about 30 Hz ... 3.5 kHz with the manual frequency control ("Frq."), beyond 20 kHz with additional external CV
- Switch position M: about 1 Hz ... 150 Hz with the manual frequency control ("Frq.")
- Switch position L: about 0,1 Hz ... 10 Hz with the manual frequency control ("Frq."), down to several minutes with additional external CV

Two exponential frequency control inputs are available: CV1 without attenuator and CV2 with polarizer. Consequently the module can be used even as an experimental sine VCO but does not feature an exact 1V/oct CV input! The precision CV input will be left to the thru-zero quadrature VCO.

Two LEDs display the positive and negative share of the sine output.

The core of the module is a so-called quadrature circuit that generates a sine a cosine signal with very low distortion. The quality of the sine/cosine signals are much better than those generated by a waveform converter with a sawtooth or triangle signal as starting point.

The output levels are about 5 Vss (+/-2.5V) but can be adjusted internally by a trimming potentiometer (P5 "Shape").

Typical applications:

- External sine/cosine oscillator for the frequency shifter A-126
- Modulations with pure sine/cosine waveforms
- Quadrature/barberpole effects (e.g. with the voltage controlled mixer A-135)
- Experimental sine/cosine VCO (e.g. for FM sounds)

Many users suggested to add a common output level control, i.e. four VCAs with one common control (manual + CV without attenuator + CV with polarizer) for the output levels. This is why we also designed the Quad VCA module A-132-2 with the possibility of an internal default connection to the four outputs of the A-143-9 (no soldering required, short 10 pin flat cable with removable connectors on both ends).

The A-143-9 is also a meaningful addition for the Frequency Shifter module A-126. It enables frequency shifting even below 50 Hz generating e.g. these mellow beat sounds with a few Hz frequency shifting only. The following document describes how to connect the A-126 and the A-143-9: A126_A143_connection.pdf.

The thru zero version of the A-143-9 with temperature compensation is the module A-110-4.

Notes: Module A-150-1 (Dual VCS) contains two separate voltage-controlled switches.

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

Two LEDs show which in / output is active (i.e. which is connected to the common out / input).

Notes: Module A-160 is a frequency divider for clock/trigger/gate signals, designed to be a source of lower frequencies, particularly for rhythm uses. The Trigger input will take clock signals from, e.g. an LFO, MIDI sync, or the gate from a MIDI-CV interface.

At the outputs, you have access to the sub-divided clock signals, from half the clock frequency down to 1/64. The low/high levels of the output signals are 0V and about +10V.

The A-160 also has a reset input. Whenever a reset signal is sensed, all outputs are set to zero, until the reset voltage disappears.

The Clock Divider can be used in combination with the A-161 Clock Sequencer to produce stepped sequences with a length of from one to eight events.

Notes: A-133-2 is the slim version of the A-133 but has some additional features and improvements available compared to the A-133.

Module A-133-2 can be used for a lot of applications: as a simple VCA, or a voltage controlled polarizer/attuverter, or a voltage controlled inverter up to a DC coupled ring modulator. In principle the module contains two special voltage controlled amplifiers (VCAs) that allow both positive and negative amplification.

The overall amplification is definded by the sum of the voltage generated by the Man control, the external control voltage CV and the position of the CV control which works as an attenuator for the external control voltage. Without external CV the amplification is +1 when the Man control is fully CW. In the center position the amplification is zero and fully CCW it's -1 (i.e. the incoming signal is inverted). By means of the external control voltage CV the manually adjusted amplification can be modulated. CV can be both positive or negative (i.e. bipolar) to obtain positive or negative amplification values controlled by the external CV.

In addition the CV signal can be modulated via the modulation control input Mod by means of another control voltage. The Mod socket is normalled to +5V, i.e. a constant positive voltage is used as modulation CV provided that no plug is inserted into the Mod socket.

The current amplification is displayed by a dual color LED (note: it's not a signal display but indicates the amplification, probably yellow = positive amplification, red = negative amplification)
Application examples:
voltage controlled amplifier (VCA) with pure positive overall amplification (Man + CV)
voltage controlled inverter with pure negative overall amplification (Man + CV)
voltage controlled polarizer/attuverter overall amplification changing between positive and negative (Man + CV)
DC coupled ring modulator with offset feature, the "classical" ring modulator corresponds to Man=0 and symmetrical audio signals for In and CV
additional effects by means of the modulation feature of the CV signal (using the Mod input)