Search results: addac

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


One of the most impressive granular synthesis approaches in Eurorack, combining looping and granular effects with buffer sizes up to five minutes. Hugely creative and powerful dual-module setup.

Supplier's Notes:
There's a long history behind the granular concept and many reinterpretations of it's core principles, this is ADDAC's take on it.

In a loose description digital Granular refer to pieces of sound files being played at the same time with slight or completely different parameters originating what is commonly referred to as granular clouds. Normally there's a buffer size from which the granular engine snips it's pieces from and plays them according to the parameters set. This buffer size is normally small in size where grains are so small that can reach the hearing spectrum and be heard as a sort of ever changing complex wavetable, this is the principle behind granular synthesis.

ADDAC have added the possibility of long buffer sizes up to 5 minutes, allowing "softer" approaches to the granular principle using it as an effect that can generate from "accidental" effects like slight "stutters" to extreme processing and transformation of any incoming audio signal.

This module is conceptually deep but easy to grasp and operate as all controls are in its dedicated panel, all jack inputs and outputs have its own separate panel to allow no compromise when playing it's controls.

There are three main sections in this module:
Looper Engine: The Looper is where all the Real-Time recording happens. The audio input feeds the recording buffer, multiple controls allow to record and play loops into a list so that any sample in the list can be accessed at ay time and more acting as a standard looper
Granular Engine: The Granular acts upon the buffer of whatever LOOP is selected.
Output Mix The output mix allow individual control for the Dry Input, Looper Volume and Grains Volume.
Besides these main sections there's also a simple strip down MENU mainly used to LOAD and SAVE Banks, no Menu diving guaranteed.

For more detailed info, please refer to the User's Guide.

Audio Specs:
Audio input: Stereo, 16bit 44.1Khz
Audio output: Stereo, 16bit 44.1Khz

Tech Specs:
32HP + 13HP
4.5cm deep
240mA +12V
70mA -12V

Notes: Inspired by the legendary Moog CP3 mixer, the 713 tweaks the old-school discrete circuits into three stereo inputs and one mono channel, summing to stereo with adjustable feedback and clipping to add character.

Supplier's Notes:
ADDAC713 is the stereo version of ADDAC System's 703 Discrete Mixer.

Inspired by Moog's CP3 mixer, this is a fully discrete analogue mixer and it's not, by any means, your standard breakfast mixer, although it can behave like one.

This is a wolf in sheep's clothing. Despite its harmless looks there's a dark snarly soul behind that panel that wants to take your sounds into a realm of gritty gnarly growls.

This new version was initially thought of as a percussion mixer, with mono inputs and panning, to allow placing percussive voices in the stereo field, while keeping channel 4 in mono for low end sources like a kick drum or Bass. In the development process ADDAC System slightly changed this initial idea, adding stereo inputs for the first 3 channels, but still kept the 4th channel in mono.

All four [GAIN] controls go to extreme levels, the first 3channels also feature [PAN] controls. Feedback is used to overdrive the whole mix. As the control is turned clockwise the sound will be clipped harder until it goes completely off, this happens as feedback is increased the audio bias reference also moves up, at extreme levels it offsets the whole signal upwards until it completely goes above the top rail clipping the whole signal hence the resulting gate effect.

The [MASTER OUTPUT] sets the overall output gain of the mixer, the two leds monitor the audio output signal. The Soft clipping switch engages an anti-click circuit which adds a low pass before the output, the switch allows 3 states: Soft low pass / Off / Hard low pass.

Features:

Three channels with stereo inputs, gain and pan knob
One channel with mono input and gainknob
Feedback/gate knob
Master output volume knob
Soft clipping switch
Two Led Monitors for Left and Right channels

Tech Specs:

8HP
4cm deep
80mA +12V
80mA -12V

Notes: ADDAC712 is a dual channel discrete gain staging amplifier, based on a famous discrete preamp board from the 70's used in some legendary equipment.

What was eye-catching was the character of its clipping and resulting saturation/distortion.

The module can be used with modular signals to add a distortion/fuzz character or as a preamp for an external source such as a line source, keyboard, guitar...

It's also a great side companion for our ADDAC711 Balanced Inputs.

At the top an On/Off [BYPASS] switch routes the signal into the Effect (Up: Active) or to the bottom output gain stage (Down: Bypassed).

The amount of amplification is set by the [GAIN] control, the maximum amount of amplification can be set by the user using the [MAX GAIN] trimmer.

Up to +/-5.5v the incoming signal will keep it's integrity, beyond this point saturation will start to increase.

At approx. +/-6v a hard clipping will start to occur, this clipping also has a particular quality that at extreme levels it drifts the audio 0v bias reference, moving it upwards which results are similar to a Gate effect.

In the middle, an x2 opamp based output gain stage with a clipping led, which monitors the clipping at the output, and an [OUTPUT] control to set the output volume.

Having the top and middle gain stages provides flexibility allowing the user to completely distort the signal on the top stage and tame it's output level with the second stage.

At the bottom, Input and Output for both channels (Left input is normalled into Right input).

Tech Specs:
6HP
4 cm deep
40mA +12V
40mA -12V

Notes: Most musicians use their feet as an extension of their playing, either pushing piano pedals, sustain pedals, guitar pedals.

However, feet have been underrated while using modulars. In the past ADDAC released a series of modules using sustain and expression pedals for triggering or controlling signals to help breaking the ice. While these are small and still useful for simple uses, ADDAC wanted to create something more specific this time.

This new solution features 5 footswitches and 5 inputs for external expression pedals with independent controls for each.

The aim was to save HP rack space and so created an external floor pedal with all the footswitches and controls, keeping the module HP to the minimum possible featuring only the 10 outputs and the connector to the external floor pedal.

There are many expression pedals in the market and although the most common one is the TRS pedal there are 2 other standards: RTS and TS.

All five ADDAC311 inputs expect TRS pedals, if you're looking into buying one choose a TRS pedal.

If you already have other pedals channel 4 features jumpers that can be switched in order to be used with a RTS pedal.

Channel 5 features a jumper that can be switched in order to be used with a TS pedal.

External expression pedals are required for their outputs to work.

External expression pedals are not included

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: ADDAC710 is a dual channel Isolated DI box and is all about keeping the sound coming from your Modular free from any undesired noisy interferences, making sure that what you're getting from your outputs is what your Modular is actually producing. It provides galvanic electrical isolation between the Modular system and external sources preventing impedance mismatch and ground loop induced hum. ADDAC's 710 circuit is designed around a unity 1:1 type Low-cost Audio Transformer operating in the 20 Hz to 20 KHz range, this impedance matching transformer provides two fully balanced outputs (via XLR connectors). ADDAC710 is a low-cost alternative to the ADDAC800X High-End Outputs module, we redesigned the original circuit using a smaller low-cost transformer that also reduced its depth allowing it to fit shallow Eurorack cases.

There are two independent channels on the module with:

Audio Input

LIFT/FLOAT/GND toggle switch
Signal overload warning led
XLR Output

The LIFT/FLOAT/GND 3-way switch lets you choose between lift, ground or floating ground.
In the LIFT position (left) the module circuit will be "lifted" to ground through a 100R resistor and a 10nF capacitor.
In the FLOAT position (middle) Ground will not be shared leaving ins and outs grounds completely apart from each other fully isolating both signals. in the GND position (right) Ground will be shared between inputs and outputs, here no isolation is used.
Any of these three positions may be the best form of avoiding ground loops or any other undesired interference occurring between your modular and the sound system you're plugging it into. Try out which one of these options will work best in any given situation.

Tech Specs:

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

The importance of using Audio Transformers
Applying a transformer balanced output isolation has lots of advantages over other less expensive ways for dealing with ground loop issues. This method provides the chance to set a very simple and clean circuit in which the signal transfer process develops smoothly and humming free. The transformer is a device that performs both signal balancing and high-to-low (or vice-versa) impedance conversion, while rejecting straggled DC voltage and Radio Frequency Interference from signal passing through a magnetic bridge. In a transformer, two (or more) coils (called windings) of insulated wire wound around a magnetic metal core allow for its input(s) and output(s) not to be physically connected together. When an AC signal passes through the input winding (the primary), a perfectly related AC signal appears on the output winding (the secondary). This way, by the fact that signal flows via inductive coupling between the two windings of the transformer, this module presents a most accurate electrical isolation between its input and output. A same number of windings on each coil guarantees that there's no gain loss when audio signal passes from the primary to the secondary windings. Furthermore, since these two windings are insulated from each other, the transformer will electrically isolate ADDAC710 from any other device, preventing hum problems coming from an outsider ground. Being a low-cost transformer the frequency response curve is not as linear as our 800X, still the -0.2dB attenuation at 50Hz feels negligible.

Phantom Power

+48V Phantom Power is NOT needed for the module to operate.
In any case having Phantom Power ON won't influence the module operation.

Notes: ADDAC711 is a dual channel Isolated DI box and is all about keeping the sound coming into your Modular free from any undesired noisy interferences, making sure that what you're getting from your inputs is what your external hardware is actually producing. It provides galvanic electrical isolation between the Modular system and external sources preventing impedance mismatch and ground loop induced hum. ADDAC's 711 circuit is designed around a unity 1:1 type Low-cost Audio Transformer operating in the 20 Hz to 20 KHz range, this impedance matching transformer provides two fully balanced outputs (via XLR connectors).

There are two independent channels on the module with:
Audio Output
Signal overload warning led
LIFT/FLOAT/GND toggle switch
Gain control
XLR Input

The LIFT/FLOAT/GND 3-way switch lets you choose between lift, ground or floating ground. In the LIFT position (left) the module circuit will be "lifted" to ground through a 100R resistor and a 10nF capacitor. In the FLOAT position (middle) Ground will not be shared leaving ins and outs grounds completely apart from each other fully isolating both signals.
In the GND position Ground will be shared between inputs and outputs, here no isolation is used. Any of these three positions may be the best form of avoiding ground loops or any other undesired interference occurring between your modular and the external hardware. Try out which one of these options will work best in any given situation.

The importance of using Audio Transformers

Applying a transformer balanced input isolation has lots of advantages over other less expensive ways for dealing with ground loop issues. This method provides the chance to set a very simple and cleancircuit in which the signal transfer process develops smoothly and humming free. The transformer is a device that performs both signal balancing and high-to-low (or vice-versa) impedance conversion, while rejecting straggled DC voltage and Radio Frequency Interference from signal passing through a magnetic bridge. In a transformer, two (or more) coils (called windings) of insulated wire wound around a magnetic metal core allow for its input(s) and output(s) not to be physically connected together. When an AC signal passes through the input winding (the primary), a perfectly related AC signal appears on the output winding (the secondary). This way, by the fact that signal flows via inductive coupling between the two windings of the transformer, this module presents a most accurate electrical isolation between its input and output. A same number of windings on each coil guarantees that there's no gain loss when audio signal passes from the primary to the secondary windings. Furthermore, since these two windings are insulated from each other, the transformer will electrically isolate ADDAC711 from any other device, preventing hum problems coming from an outsider ground. Being a low-cost transformer the frequency response curve is not completely linear, still the -0.2dB
attenuation at 50Hz feels negligible.

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 ADDAC302 Nchunk Control module allows you to connect a Nintendo Nunchuck controller to your modular synth, featuring a two-axis thumb joystick, a three-axis accelerometer and two trigger buttons.

The module provides CV outputs for all of the Nunchuck's parameters and special functions to remap the CV outputs. The remapping can be both continuous or step-by-step and can be accessed through either the dedicated CV inputs or the manual controls.

A specially dedicated Mix output averages between the first two CV outputs, a very useful feature for continuous control parameters.

Mechanical:
- Format: Eurorack
- Width: 8 HP
- Depth: 4 cm

Control Voltage I/O:
- CV inputs: 0 - 10v
- CV outputs: 0 - 5v
- Gate in threshold: 2.5v

Electrical:
- Compatible with +-12v and +-15v power supplies
. Max current: 100mA?
. Bus Board Cable: 8 × 2 IDC (Doepfer style) connector

Notes: Inspired and officially licensed from Teia's Stochastic Function Generator which was introduced in 2013 but is no longer available. This earlier version served as an inspiration, but with a completely rebuilt and reprogrammed mcu to a fully featured 4 voice 2 stage envelope and slew generator.

This new module + expansion is ADDAC System's take on a different envelope/slew generator. It's a fully featured Quad Analogue Core Envelope Generator and Slew Processor with digital control which also incorporates built in random generators to control the Rise and Fall times.

Covering the full range from short sharp notes to long slow sweeps of up to 6 minutes. Together with the random generators it excels when used for drone soundscapes.

Used as a Slew Processor the random generators act as dynamic modulation sources affecting the rise and fall slew speed.

Fully featured outputs act as encouragement to self-patching creating interdependent envelopes acting in sync.

width: 20HP
200mA +12V
150mA -12v

ADDAC506B:
width: 2HP
10mA +12V
10mA -12v

CV OUTPUT RANGE:
Each channel CV output range can be set with the [Amplitude] and [Offset] attenuverters.
Amplitude can be set to a maximum of 10v peak to peak(pp), ex 0 to +10v or -5v to +5v.
Offset can as a maximum range of 20v peak to peak and allows to offset the CV to i10v.

Notes: This module was developed upon the Tubaz Filter which was released in 2014 by Gotharman but is currently no longer in production. We loved the original module so much that we officially licensed it's circuit and expanded it to feature several new functionalities.

Here's a paragraph from Gotharman regarding the original design:
"I designed it with the purpose of adding crunch, edge and distortion to my eurorack system. It is not an ideal bandpass filter, that cuts off all frequencies above and below the center frequency.
Because of its high drive, there are, in most cases, some bleedthrough of the harmonics, that should have been cut off. You might consider calling it a "Band Add" filter. The main purpose of it, was to add edge, not to be a perfect bandpass filter."

While everything he mentions is still true we believe he was being modest, It's a dirty, gritty, growling and whining monster which promises you some of the most peculiar filter sounds you'll ever hear.
However do not classify it as a "weird" distortion unit just yet because besides this hairy character it can be easily tamed (using lower volume levels) and then, with some care and intention from the user, it will transforrm itself showing it's feline purrrrr and cuddle sweet and caring, or like any good mut, showing up at night all happy, wet and dirty from a full dog's day and will lay down at your feet while wiggling it's tail howling as yawning just happy to be back home.

As such, standard volume principles do not quite apply to these units, the Audio Levels will go up to x2 amplification, Drive will go up to x11 and master outs go up to x2. The combination of these will cover all diferent qualities it can present. Overall sound can be distorted pre-Tube (raising input levels), in Tube (raising drive) or post-Tube (raising Out levels).
Higher Inputs and Drive will always be gritty, lower Inputs and Drive volumes together with higher Output levels will make the overall behaviour more mellow and closer to what a typical filter would behave like.

No standard expectations should be considered when acquiring these units, all of the tubes were built in the 70's and were bought from various sources, we always kept the premise that no tube was a bad tube (unless not really workinng) so due to each specific characteristics no module will sound exactly the same, making each unit particularly unique. This uniqueness will be particularly evident on their resonance/self-oscilating timbre as well as in their own microphonic qualities.

Regarding power and current draw, the module is designed using a low power tube, so it won't starve your eurorack power supply.

Tech Specs:
12HP
3.5cm deep
90mA +12V
60mA -12V

Notes: Dedicated expansion for the ADDAC807C VC Summing Mixer

Features 4 individual track post fader stereo outputs.

2Hp
2 cm deep
0mA

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


Inspired by the legendary Moog CP3 mixer, the 713 tweaks the old-school discrete circuits into three stereo inputs and one mono channel, summing to stereo with adjustable feedback and clipping to add character.

Supplier's Notes:
ADDAC713 is the stereo version of ADDAC System's 703 Discrete Mixer.

Inspired by Moog's CP3 mixer, this is a fully discrete analogue mixer and it's not, by any means, your standard breakfast mixer, although it can behave like one.

This is a wolf in sheep's clothing. Despite its harmless looks there's a dark snarly soul behind that panel that wants to take your sounds into a realm of gritty gnarly growls.

This new version was initially thought of as a percussion mixer, with mono inputs and panning, to allow placing percussive voices in the stereo field, while keeping channel 4 in mono for low end sources like a kick drum or Bass. In the development process ADDAC System slightly changed this initial idea, adding stereo inputs for the first 3 channels, but still kept the 4th channel in mono.

All four [GAIN] controls go to extreme levels, the first 3channels also feature [PAN] controls. Feedback is used to overdrive the whole mix. As the control is turned clockwise the sound will be clipped harder until it goes completely off, this happens as feedback is increased the audio bias reference also moves up, at extreme levels it offsets the whole signal upwards until it completely goes above the top rail clipping the whole signal hence the resulting gate effect.

The [MASTER OUTPUT] sets the overall output gain of the mixer, the two leds monitor the audio output signal. The Soft clipping switch engages an anti-click circuit which adds a low pass before the output, the switch allows 3 states: Soft low pass / Off / Hard low pass.

Features:

Three channels with stereo inputs, gain and pan knob
One channel with mono input and gainknob
Feedback/gate knob
Master output volume knob
Soft clipping switch
Two Led Monitors for Left and Right channels

Tech Specs:

8HP
4cm deep
80mA +12V
80mA -12V

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


A fresh twist on a simple 303-style acid synth, featuring a triangle/sawtooth/square wave VCO, multi-mode resonant filter, simple AD envelope and a VCA which can be overdriven. Excellent value.

Supplier's Notes:
ADDAC started this module with the idea of developing a complex drum source however, somewhere along the process, it was clear how much better it performed as a synth voice and this lucky accident was embraced.

It features a VCO with a [FREQUENCY] and [FINE TUNE] knob plus a dedicated CV Input and Attenuator knob (tunable over 4 octaves).

The VCO waveform output is achieved by selecting either a Triangle or Saw through a switch. the selected waveform can then be mixed/balanced against the square wave. The resulting mix is then sent to the Filter.

The Filter features a [CUTOFF] and [RESO] resonance knob plus a Cutoff CV Input and Attenuverter knob.

A 3 position switch is used to select the filter type: Highpass, Bandpass or Lowpass.

The resulting output is then sent to the VCA.

The VCA features an Input with [INPUT GAIN] knob which at maximum can amplify the incoming signal by a factor of 2.

This is a very important control, it accepts any signal Trigger, Gate or CV. Whatever input is plugged in the signal is then fed through an AD with a very short attack and controllable decay through the [VCA DECAY] knob plus the CV Input and Attenuverter knob. The resulting slewed signal is then used to control the VCA gain.

This signal is also sent to the CV OUTPUT as well as the LED monitor.

The Accent input adds to the Input signal creating a different amplitude output.


The CV OUTPUT is normalled to the Frequency and Cutoff inputs.

Tech Specs:
9HP
4cm deep
80mA +12V
80mA -12V

The [INPUT GAIN] knob

Usually Attack/Decay envelopes have a maximum voltage of +5v, no matter if the input gate is +5v or above the AD will clip at +5v. In this case, this clipping method was not used, and instead ADDAC allowed the incoming voltage to determine the maximum AD voltage, meaning that if a +5v gate is present then the AD maximum voltage will be +5v but if a gate of +10v is sent then the AD maximum voltage will be +10v.
This also means that with higher input voltages the decay, although falling at the same speed, will be longer than with lower voltages as it has a longer range to go back to 0v.

As previously mentioned, The [INPUT GAIN] knob can amplify the incoming input by a factor of 2, allowing to use a standard +5v gate or envelope and being able to make the resultant AD go up to +10v.

The AD signal is responsible for opening the VCA. Up to +5v the VCA will open to unity gain above this value the VCA will start to amplify and eventually saturate and distort. This saturation will add harmonics to the signal which will change its gentle timbrical nature to a more unique and peculiar timbre that will make the module shine in Acid contexts.

Adding high levels of Resonance or even filter self oscillation in combination with high VCA saturation will create even more harmonics that ADDAC highly encourage the user to explore.

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


Complex gate and CV generator designed as a trigger source and modulation tool. Based around four sine wave LFOs that mix together and interact to create ever-changing patterns.

Supplier's Notes:
In 2009 John Berndt coined and defined the term Relabi in his essay "Relabi": Patterns of Self-Erasing Pulse, these are his own words: "Relabi, Def.: The experience of a palpably coordinated plurality of events that appears to be cyclical but simultaneously suspends identification of a uniform pattern, preventing a resolved sense of pulse. Relabi therefore seems equally pulsed and unpulsed at the same time. It is an experiential gestalt, a quality of experience, greater than the sum of its parts (it forms a sustained unity in experience, albeit of a new kind)."

He also makes the question: "Why would anyone want this Relabi experience? I maintain that much of what is exciting in musical forms involves an interplay between the setting up and denying of pulse expectations."

Inspired by this idea, ADDAC System developed this module that is both a gate/trigger and cv generator that can be freely used to trigger events or act as a complex modulation source. Four Sine LFOs are internally generated, each has controls for gain, frequency and mute(off). These 4 LFOs are then mixed together to generate what Berndt named the "Relabi Wave" this "wave" becomes a complex bipolar CV source. This i5v bipolar "wave" can be monitored on the 2 dedicated leds and is also available at its own Output.

Make sure to check the User's Guide for indepth description, working behaviour and diagrams.

Tech Specs:
10HP
4cm deep
100mA +12V
40mA -12V

Notes: The ADDAC603 VC Triple Bandpass Filter provides three channels of bandpass filters, fantastic for sculpting complex sounds. Each of the channels feature a gain/distortion control with switch to select between x3 or x100 gain, which can cause the input signals to distort, adding another layer of harmonic interest.

The inputs are cascaded together to allow for one source to be filtered three different ways - or each filter can be used independently. The three filters also feature controls for frequency, which sets the cutoff point; width, which sets the width of the band that is being filtered; feedback, which at high settings causes the filter to self-oscillate, and level control, which sets the amplitude of the output. Frequency, bandwidth, and output level each have CV inputs with attenuverters.

A switch sets whether the filter is 24 dB or 12dB per octave. There are individual outputs with phase switch, plus a mix output and dry/wet output with adjustable control for mix balance. This module provides a wide variety of filtering options to add complex tonal shaping to your rack.

Tech Specs:

22HP
3.5 cm deep
250mA +12V
250mA -12V

Notes: Eight independent fixed-frequency filter bands combine with linear VCAs to create massive sonic potential. VCAs also double as envelope followers, with a CV output per band.

Supplier's Notes:

The ADDAC601 Analog Filterbank will have you shaping the spectrum of your sound "tout de suite".

With its 8 fixed frequencies, this very special filterbank has two additional features that you won't find anywhere else. Each of the 8 band volumes can be controlled through a linear high performance VCA, which adds great dynamics and new abilities to the art of filtering. Additionally this module also doubles as an envelope follower, with a dedicated CV output per band.

It features numerous output options: you can select between individual bands, the full processed sound, a wet/dry signal and even choose between odd or even frequencies.

Plus you can add up to two different signals, which are mixed internally by the ADDAC601 inputs.

- Format: Eurorack
- Width: 20 HP
- Depth: 5.5 cm

Control Voltage I/O:
- CV inputs: i 5v
- CV outputs: 0 - 10v

Electrical:
. Compatible with +-12v and +-15v power supplies
. Max current: +340mA/-350mA
. Bus Board Cable: 8 × 2 IDC (Doepfer style) connector

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: Inspired by Twin T-Networks circuits used in many lengendary drum machines, ADDAC system have developed a simple and straight forward 4 voice percussion module with frequency controls for each of its voices.

At each voice input there's a gate to trigger converter so any input source is possible.
Audio inputs can also be used as an input, in this case and due to the nature of the gate to trigger converter, each voice can be used as very destructive filters.

The top 2 channels feature a higher frequency range, the bottom 2 channels feature a lower frequency range.

Tech Specs:
6HP
2.5 cm deep
40mA +12V
40mA -12V

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: This is a complex Gate / CV generator based on probabilities.

Functions:

Knob 1:
%1 = Gate 1 Probability
5TG = Fifth Output Type: Trigger/Gate
N1 = Note 1 Tuning

Knob 2:
%2 = Gate 2 Probability
T.SIZE = Trigger Size
N2 = Note 2 Tuning

Knob 3:
%3 = Gate 3 Probability
DIR = LOCK Mode Direction: Backwards/pendulum/forward
N3 = Note 3 Tuning

Knob 4:
%4 = Gate 4 Probability
S.SIZE = LOCK Mode Sequence Size: up to 16 steps
N4 = Note 4 Tuning

Knob 5:
SWING X = Clock Swing X: 1 to 16
Y = Clock Swing Y: 1 to 16
N5 = Note 5 Tuning

Gate Outputs Behaviour:

At every clock input, based on the four knobs probability settings, the module will select one active gate out, only one of the five gates will be active at all times. All Gate outputs can also behave as a Trigger instead, Trigger size can also be adjusted.

The knobs set the probabilities of each gate to be chosen, here's an example of how this operates

With all first four knobs at 12 o'clock the first Gate has 50% of being the chosen one, the remaining 50% of the times will be passed through the next knobs. So Gate 2 at 12 o'clock has 50% of the remaining 50% left by setting one, which leaves it with 25% chance of being the chosen one, the remaining 25% will be passed through Knob 3 which will have 12.5% chance of being the chosen one, the remaining 12.5% will be sent to Setting 4 which will have a probability of 6.25%. The remaining percentage left by the 4 Settings will always be the probability of Gate 5, in this case the remaining 6.25%.

Here's a couple more examples.

All knobs at 12 0'clock
Setting 1 = 50% chance, 50% left for remaining settings.
Setting 2 = 25% chance, 25% left for remaining settings.
Setting 3 = 12.5% chance, 12.5% left for remaining setting.
Setting 4 = 6.25% chance, 6.25% left for Gate 5.

All knobs at 9 0'clock (aproximate values)
Setting 1 = 20% chance, 80% left for remaining settings.
Setting 2 = 16% chance, 64% left for remaining settings.
Setting 3 = 12.8% chance, 51.2% left for remaining setting.
Setting 4 = 10.24% chance, 40.96% left for Gate 5.

Tuning and CV outputs:

While in the Tuning page you can use all knobs to set the 5 pitches
When in tuning page knobs should be rotated one at a time!
While rotating the knobs the CV out 4 will be used as a monitor, the other 3 CV outs will be behaving normally.
The module detects which pot is being rotated and outputs the relative pitch CV on CV out 4 for all knobs.
While on this page the tuning will be quantized or not relative to the panel Quantize on/off switch. Even if this process is done in quantized mode the module always store the free value in order to allow quantisation to be turned off later.
Once you're happy with the tuning you can exit the page, new values are stores to memory while exiting the page.
When tuning the module detects both the note selected and the relative octave.

CV Outs behaviour
This will be easier to explain with examples

Let's say we tuned these notes:

C0 or 0v
D1 or 1.166v
F2 or 2.466v
G3 or 3.583v
A4 or 4.75v

1. Next Logic out calculated is gate 3.
CV outs 1-2-3 will output a note in octave 2, the note itself is randomised from the 5 tuned notes (C,D,F,G,A).
CV out 4 will output the exact note tuned with knob 3 (F2)

2. Next Logic out calculated is gate 5.
CV outs 1-2-3 will output a note in octave 4, the note itself is randomised from the 5 tuned notes (C,D,F,G,A).
CV out 4 will output the exact note tuned with knob 5 (A4)

Out 1-2-3 is octave related
Out 4 always output the original tuned note

Knobs Pages access:

MENU/TRIGGER button is used to access pages
After power up it gets to first page by default.

Page 1:
MENU/TRIGGER button is off and blinks with clock inputs

Page 2:
Pressing the MENU/TRIGGER button for 3 seconds the Button Led lights up meaning you're in Page 2, changing knobs will affect the secondary function.
Releasing the button jumps to Page 1

Page 3:
Pressing the MENU/TRIGGER button for 3 seconds the Button Led lights up, keeping it pressed without moving any knob for 3 more seconds makes the Button led go off. At this time you can release the button. After that the button will light up meaning you're in page 3, or the tuning page.
Pressing the button one time jumps to Page 1

Soft-Recall and Memory:

Knob positions are stored in memory while in operation to be able to have a soft recall of the settings, so when jumping from page to page you'll need to rotate the knob until you find the last setting and only then they start to operate. Whenever the pot crosses the last setting point the MENU/TRIGGER button will blink indicating that the knob is now active.

Page 2 & 3 have permanent memory so it will always load the last settings after power up.
Page one is volatile and powers up with the initial knobs settings.

Notes: ADDAC306 is a 5 channel multi-directional CV generator.

You can think of it as a "sweet spot" controller, or a hands-on way of transiting from one state to another.

Each of the five channels has MINIMUM, SPAN and DIRECTION controls, a common CV IN and a common TRANSITION CONTROLLER slider.

MINIMUM sets the minimum channel voltage.

SPAN sets the voltage range of the channel.
It essentially sets the maximum voltage that can be output from the channel, relative to what the current channel MINIMUM is. For a given SPAN value, if the MINIMUM voltage is changed then the maximum voltage output from that channel will also change respectively.

DIRECTION sets whether the voltage transition for each channel goes from MINIMUM to maximum, or maximum to MINIMUM.

The TRANSITION CONTROLLER slider controls the transition from the minimum value (A) to the maximum value (B) or vice versa, according to the settings of each independent channel.
Moving this slider generates 5 different voltages with 5 different ranges and directions. The transition can also be operated from a CV source at the CV IN, in which case the slider position acts as an attenuator for the incoming voltage.

The maximum range of each channel can be set to either 5 or 10 volts, by 5 jumpers in the back of the module. Only positive voltages are generated at the output.

Using the CV IN you can use two ADDAC306 modules to expand your control options to 9 voltage outputs under one common slider control.
Use the VC Transitions to multiply the polyphony of a single CV sequencer by passing its outputs through the ADDAC207.
VC Transition makes for an awesome state transition controller. Plug its outputs to various CV controller parameters of your audio effects modules. Set the slider to position A, and set the minimum values for each channel. Then move the slider to position B and set the SPAN settings for each channel. Use the TRANSITION CONTROLLER slider to morph from state A to state B and backwards. Flip the DIRECTION switches to change the direction of the transition for each channel. Use the CV IN to automate the transition using LFOs, ADSRs or sequencers.
Plug the output of your ADSR envelope to the CV IN and set the channels differently to get 5 different ADSRs from one common source.


This module was developed based on an initial idea by Konstantine Fioretos.