Synth modules

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: Following ADDAC's ADDC503 Marble Physics here is a new simulation of a physical system. This time, imagine a small area in the middle of the ocean, in this area we place 4 equally spaced buoys anchored to the bottom in such a system that we can control the spacing between the buoys. Imagine we can control the elements and agitate the waters at will which in turn will make the buoys move up and down as the water surface moves.

Finally imagine the buoys would wirelessly transmit their absolute height directly to your module outputs where they would be mapped to a voltage signal.

ADDAC use a Gerstner Wave as the motor behind the two-dimensional wave generation. In fluid dynamics a Gerstner Wave is described as "a progressive wave of permanent form on the surface of an incompressible fluid of infinite depth". Gerstner waves are often used in computer graphics to simulate any type of water surface, if you've seen any animation film or computer game with water surfaces in it most probably it features a Gerstner wave generating it.

Tech Specs:

10HP
4.5cm deep

70mA +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: 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