MATRIXSYNTH: Ewa Justka



Showing posts with label Ewa Justka. Show all posts
Showing posts with label Ewa Justka. Show all posts

Tuesday, September 03, 2024

Metasonix meets Optotronics


August 30, 2024 video upload by Brian Comnes

"A little vid I did to demo what my TS21 clone did to Ewa Justka’s (Optotronics) Triangle synth"

Tuesday, April 16, 2024

Stereo Lockhart Wavefolder + drum machine // Heretic Machines aka optotronics


video upload by e j





via Heretic Machines aka optotronics

"This is a stereo wavefolder, 10 hp. It can be quite distorted and brutal !

It's loosely based on nonlinear circuits wf core (Lockhart cells)

This stereo wavefolder allows you to achieve interesting stereo - folding effects even with very basic modulation.

Output 1 is normalised to the input 2- this allows you to use it as a single ten-fold wavefolder!

When channels are used separately the module functions as dual 5-fold wavefolders.
CVs (fold and offset) from the left channel are normalised to the right channel - so you can use single source modulation for both wavefolders.
It can sound quite brutal and distorted-10 folds is not nothing!

Perfect for mad panning, distortion effects and FM madness!

teeeeeennnnnnnnnnnn fooooooooollllllldddd"

Friday, March 29, 2024

Heretic Machines represents: Stereo Wavefolder


video upload by e j

Wavefolder + oscilloscope : short demo


"This is a stereo wavefolder.

- 10 hp

-the CV inputs are normalised from left to right allowing you to obtain complex stereo patches with just few modulation sources

-output 1 normalised to input 2, this allows you to use it as a single ten-fold wavefolder!

teeeeeennnnnnnnnnnn fooooooooollllllldddd
more info here: https://www.heretic-machines.com/"

Thursday, January 25, 2024

dual octaver


video upload by e j





via Optotronics

"The octaver is a great addition to the dual CEM VCO module (the square wave output should be routed to the pulse input).

It's based on the original Thomas Henry's VCO Maximus. It is a perfect tool for generating additional musical fifth or suboctave tones. Moreover octaver 2 input is connected to the output of the octaver 1 for additional divisions! Of course you can use them separately as well. The great thing is that this module allows you to create very interesting soundwaves and rhytms...

According to Thomas Henry : 'The pulse signal is routed to an XOR/flip-flop arrangement which generates an additional musical fifth or suboctave tone added in. You can think of this in terms of harmonics, or if you wish, as a definite harmony playing in tandem, e.g., a C note with a G note mixed in.

The pulse output from the CEM3340 is sent to Schmitt trigger to sharpen up the signal a bit. The firmed up pulse then goes to switch 'interval' which lets you choose between the addition of a fifth or an octave derived pitch. If numbers are your bag, then think of these as divide-by-1.5 and divide-by-2, respectively. On the far end, switch 'octave select' can further halve things to divide-by-3 and divide-by-6, i.e., a fifth and an octave one octave lower yet.

Polarity switch lets you add or subtract the subdivided signal from the original pulse, effectively doubling the number of waveforms possible. The output of the flip-flops is sent to one side of the blend pot, while the other side t is fed by an isolated version of the original pulse.'"

Sunday, December 24, 2023

Optotronics Pre-soldered Mini-Eurorack System



  This one in via brian comnes.

  Details below.

Friday, September 22, 2023

triPLLe VGO - AV eurorack module


video upload by



https://www.etsy.com/uk/listing/15580...

"What is it?:

- audio -video (VGA) eurorack module;

- based on 3 x PLL (phase locked loop/cd4046) and Arduino (for generating vertical and horizontal oscillators);

- frequency of the oscillators directly corresponds to the displayed lines;

- outputs: 3 square wave Voltage Controlled Oscillators & VGA (compatible with most of the projectors & LCD screens);

- each VCO contains an attenuator;

- each VCO can be either synced to vertical oscillator (left position of the toggle switch) or horizontal oscillator (right position of the switch), or can run freely (middle position of the toggle switch);

- each VCO contains two Control Voltage inputs;

- horizontal and vertical oscillators can be synced with external inputs and /or CVs;

!!! you can play around with feedback loops between VCOs by patching one output to another input and vice-versa!!!

- high frequency (above audible; CAN BE UNPLEASANT ) = vertical lines; lower frequency= horizontal lines"

Tuesday, August 01, 2023

Optotronics - mini eurorack AV system


video upload by e j

"modules include:
-power module
-S&H/T&H
-PT2399 Delay
-VCA/VCLFO
- AV VGA module (3 VCOs)

runs on 15V 2A power supply which is not included.

more info here (including detailed PDFs with schematics+ description) : https://www.etsy.com/uk/listing/15352..."



Friday, June 16, 2023

TRI-VGA SYNTH


video upload by e j

"Triangle VGA sequencer is an unorthodox audio-video synthesiser. It consists of arduino for generating VGA signal, bunch of CMOS chips like: shift registers, frequency dividers, bilateral switches and phase locked loops. It’s noisy, unpredictable and very glitchy! It also contains envelope follower, so you can plug in an external input. There are no rules in playing the triangle – the surface is magnetic, which allows you to combine variety of patterns via placing the magnets, create feedbacks between each colour/oscillator and unstable sequences. It contains two outputs – red and green, while blue controls the overall pitch of the sequencer. It has on / of toggle switches for each colour/oscillator as well as for their frequency range and three sliders for their frequency and controls for vertical and horizontal sync and clock oscillator. It has VGA output and runs on USB mini. What you see is what you hear ! It’s brute, it’s rude. it’s contingent and crude!"

Wednesday, April 12, 2023

Delayed Twin Oscillator


video upload by e j

"stand-alone stereo voltage controlled delay effect;
dual voltage-controlled oscillator;
dual voltage controlled amplifier

more info and purchase here: www.etsy.com/uk/shop/Optotronics manual: https://drive.google.com/file/d/1MmPi...

DTO stands for incestual, congenital desire between two twins. the seduction of doppelganger's [false] self; the dangers of incenstual love between conjoined twins, their parasitic yet intimate codependent and endlessly loyal existence. always generating feedback, always mirroring, always present. The Other is me, I am the Other.

'So we declare ourselves to be twins,' he agreed. 'Symmetrical creatures of a whim of nature, henceforth we shall be the same age, the same height, with the same hair, walking the highways and byways of the world in identical striped clothes with the same bow tied under our chins. But I warn you that people will turn around and look after us, half touched and half scornful, as always happens when something reminds them of the mysteries of their own beginnings.'
The Man Without Qualities;Robert Musil

check out my 'website' : ewajustka.tumblr.com
social: instagram.com/ewajustka_official"



Tuesday, March 15, 2022

Roland Jp8080 vs ILDA



video uploads by e j

"supersawing laser"

Tuesday, March 08, 2022

DIY Optotronics modular system


video upload by e j

"built for the 6 weeks long course, which took place at Iklectik, London between 11/21-03/22. The system consists of: VCOs, LFOs, VCAs, VCF, AD, power supply, wavefolder, delay, S&H, rungler. we have also built our own cases and racks. more info here: https://diy-optotronics-modular-cours...

Some of the modules will be for sale at some point in life!"

Thursday, October 21, 2021

Ewa Justka Optotronics DIY Euorack System


video upload by e j

"some example of patches.
(listen on headphones)"

Sunday, September 26, 2021

Ewa Justka Optotronics Royal Flanger (Delux)


video upload by e j

"I present to you REAL ANALOGUE stereo flanger based on two BBDs.
(also available in mono).

Stereo (delux) version contains:
-two LFOS for clocking BBD (Flanger pitch modulation)
-two separate CV input (deactivate LFOs) for external pitch control (eurorack compatible)
- CV amount knobs (which also control the pitch)
LFOs:
-'manual 'knobs - range of the flanger
-'rate' of the lfo
- sweep - depth

-FDBK knobs (feedback amount) - capable of extreme feedback!! (maximum self oscillation)

- two mono jacks in and out (for stereo version) - 6.35 mm
- two CV jacks - 3.5 mm

available in variety of vintage royal tins, on my etsy store: https://www.etsy.com/uk/shop/Optotronics

Runs on 9VDC+ (not included)."

Saturday, August 28, 2021

test10


video upload by e j

"testing, testing"

Update: Optotronics Synth DIY Eurorack System:



Update2:




"These are raw recordings of my new eurorack system. The boards' layout and panels were designed by me. All of the modules were based on quite standard designs: diode ladder VCFs, CEM VCOs, OTA VCAs, basic LFOs, discrete envelopes and single PT2 delay.

CV was generated by Korg SQ1 and Instruo's Harmonaig.

I kept modules quite simple, as the system was made specifically for future workshops and DIY kits (soon available via etsy shop)

The system will be keep growing in new modules!

credits

released August 28, 2021"

more

Thursday, December 10, 2020

ewa justka VOICE ODDER 2


e j

"WHAT IS IT?

- a synth based on PT2399 delay IC and 40106 2 light sensitive square wave oscillators
- two inputs: mic and oscillators, you can choose which input goes through the delay unit (PT2399)
- you can purchase either DIY kit (all parts included except for the battery) version with detailed instructions OR finished product.
- runs o 9v

“The word is now a virus. The flu virus may have once been a healthy lung cell. It is now a parasitic organism that invades and damages the central nervous system. Modern man has lost the option of silence. Try halting sub-vocal speech. Try to achieve even ten seconds of inner silence. You will encounter a resisting organism that forces you to talk. That organism is the word.” – William S. Burroughs, The Ticket That Exploded"

https://www.etsy.com/uk/listing/744423665/voice-odder-2

This one is in via brian comnes: "new version, with a panelyou can purchase.." via https://ewajustka.tumblr.com...

You can find additional posts featuring Ewa Justka's work here.

Sunday, September 27, 2020

Ewa Justka - HELLO? STELLA? ARTOIS...? ARTAUD?


e j

Editions Mego @ 2020
album: Upside-down Smile

---

See the Ewa Justka label below for more.

Friday, December 27, 2019

Ewa Justka's Ladder to Hell


Ladder to Hell DEMO Published on Dec 27, 2019 e j

This one in via brian comnes.

"Laddder to Hell is a celebration of resonance !!
based on Moog resonance filter - TRANSISTOR LADDER -
- OCD distortion (modified) http://3.bp.blogspot.com/-57B7rhhMBg8... [and below]

and ORIGINAL WASP filter : http://www.modular.fonik.de/pix/F_was... [and below]
(high and low pass)

AND Moog Lm 13700 filter http://musicfromouterspace.com/analog... [and below]
(also high and low pass)

audio input
CV for Moog resonance
and Wasp resonance

// i the demo i'm using TR09; TB03, vermona kickdrum and korg sequencer sq1//

you can purchase it here: https://www.etsy.com/uk/listing/76545..."

Sunday, June 03, 2018

Ewa Justka live @ Cafe Oto, London, 09/09/15


Published on Sep 22, 2015 e j

hand made drum machine, sequencer, voice odder
modified crt
cfl bulb

---

Ewa Justka of Optotronics.

Saturday, April 21, 2018

Scramble Everything - Pitch Scrambling Effect from Optotronics


Published on Apr 21, 2018 e j

From the makers of Oi, Kant!

"purchase here: https://www.etsy.com/uk/listing/59534...

Scramble Everything is a strange little synthesiser: both sound generator (it generates random sequences) and an effects unit, a pitch shifter.

The scramble suit in ‘Scanner Darkly’ was “an invention of the Bell laboratories, conjured up by accident by an employee named S. A. Powers... Basically, his design consisted of a multifaceted quartz lens hooked up to a million and a half physiognomic fraction-representations of various people: men and women, children, with every variant encoded and then projected outward in all directions equally onto a superthin shroudlike membrane large enough to fit around an average human. In any case, the wearer of a scramble suit was Everyman and in every combination (up to combinations of a million and a half sub-bits) during the course of each hour. Hence, any description of him - or her - was meaningless.”

Scramble Everything is the scramble suit of synthesisers. Whatever source you use on the input, the output will be completely scrambled, human and non-human speech-like sounds.
The main star of Scramble Everything is the pitch filter effect unit based on robotic voice modulator IC – HT8950 – which can be used either together with the internal random sequencer, or as a standalone effects unit. You can then, following Philip K. Dick, use any input source and scramble the shit out of it. Does the output still contain remains of the original sound? If you want to jump between two realities you can use the special slider that will easily transport you to the other side. Spooky! Can it get more sci-fi? Yes. The filter’s frequency not only can be controlled with the knob, but also with the light. Scramble Everything contains an RGB light source, and its colour sequence (controlled by the internal random sequencer) changes the tone of the filter. The scramble tone then depends on the intensity of each colour (red, green and blue). Additionally Scramble Everything contains three switches for each colour, so you can decide if you want to have smooth or abrupt transitions between the colours.
You can also control the amount of slide between the steps, switch from staccato to legato and vice-versa, control the pitch of the sequencer and its frequency range.
You can also use the random trigger output to trigger external sound sources.

If you want to know more about scrambled realities, please have a look at the Scramble Reading Pack here:
https://www.dropbox.com/s/0gbiwvc7agw...

Scramble Everything runs on either 9 or 12V power supply, 600mA minimum. You can also use a 9V battery.
It has 5.5mm x 2.1mm power barrel (center negative): https://i.ebayimg.com/images/g/czUAAO...

Scramble Everything was designed by Ewa Justka. Some of the conceptual framework of the machine is a result of a collaboration between Ewa Justka and Roc Jiménez de Cisneros."

Wednesday, March 08, 2017

NEW SYNTH: THE SEQUENCING MACHINE by EWA JUSTKA


Published on Feb 21, 2017 e j

"The Sequencing Machine is a pseudo modular diy synthesiser.
Depending on the patch you make you can create different sequences.
This simple yet versatile synth is capable of producing a wide range of weird sounds from watery, noisy rhythms to 8-bit melodies.

get more info and purchase it here: https://www.etsy.com/uk/listing/50031..."
NEXT PAGE HOME




Switched On Make Synthesizer Evolution Vintage Synthesizers Creating Sound Fundlementals of Synthesizer Programming Kraftwerk

© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH