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Items 1 to 3 of 3 on page 1 of 1
ADDAC System ADDAC711 Balanced Inputs Module ADDAC System ADDAC711 Balanced Inputs Module
ADDAC System ADDAC711 Balanced Inputs Module (dual/stereo/external synth module)
Cat: 904678 Rel: 19 Jan 23 • View all Synth modules
 
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.
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.
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 1 in stock $244.23
ADDAC System ADDAC405 VC Relabi Generator Module (black) ADDAC System ADDAC405 VC Relabi Generator Module (black)
ADDAC System ADDAC405 VC Relabi Generator Module (black) (clock generator/clock modulator/LFO/quad/comparator synth module)
Cat: 797099 Rel: 17 Dec 20 • View all Synth modules
 
Clock generator/clock modulator/LFO/quad/comparator synth module
Notes: 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
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MRP:$282.14 SAVE 10%
 1 in stock $253.71
ADDAC System ADDAC107 Acid Source Synth Voice Module ADDAC System ADDAC107 Acid Source Synth Voice Module
Cat: 944224 Rel: 14 Sep 23 • View all Synth modules
 
A synth voice module in 9HP.
Notes: 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.
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 4 in stock $208.43
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