Yusynth VCO, VCA, ADSR

Note: links to listings are affiliate links for which the site may be compensated.

via this auction

"This is a custom analog synthesizer that was constructed using the excellent wealth of information at yusynth.net.

The VCO, VCA and ADSR modules have been completed and calibrated. The VCO is the left-most panel. The VCA and ADSR are together in the next panel.

The power supply is from an Alesis Studio 32 mixer and has enough power for this and probably several more cabinets of this size.

Included with this synth are the three additional panel blanks needed to finish this cabinet as well as the multi-conductor wire for piggybacking the power from module to module.

Also included are several board/wire connectors to help get you started on your next module.

The pictures show what the completed modules could look like and where the various ins outs and controls are.

All of the circuit layouts, silkscreen files and schematics for these, and many more modules, can be found at yusynth.net."

Don't judge a modular by it's looks alone. :)  It's interesting to think of the impression you get when you look at one stripped of a nice printed faceplate.  The sound and functionality is the same of course, but the perception is different.  More pics below.

Yusynth of course is Yves Usson's site, the man behind the Minibrute.

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Yusynth CV Standards 1V Octave Analog Modular

via this auction
"Brand new. Highest quality parts available - no compromises. Artfully hand wired in the 5U MOTM / Moog format... Yusynth Standards Synthesizer Module. Change the pitch of three VCOs with precision from one module! I use it for all types stuff: changing the intervals on my VCOs, 1/V tuning of my VCOs and Filters, quickly changing the CV coming out of my Klee sequencer, etc. An extremely versatile module.

Building this module requires precise calibration of over 26 multiturn trimmers! Save yourself the time, hassle, and inevitable troubleshooting by purchasing this Klee fully and professionally assembled by Free State FX.

Here is some information about the Standards from the Yusynth Website:

"This utility modules provides switchable discrete CVs with useful intervals such as :

octaves; eleven 1V steps from 0V to 10V (useful to control the yusynth VCOs which have no octave range switches);
semitones; eleven 1/12 V steps from -0.4166V to 0.4166V (useful to detune a VCO with semitone intervals)
These stepped CVs are available independently on three voices and for each voice three buffered outputs are provided in order to drive more than one module (these are not multiples but true electrically separated and buffered outputs).

Also for each voice, an external CV can be summed to the stepped voltages. These inputs are intended for connecting external controllers such as a keyboard or a sequencer. Note that the input of voices 2 and 3 are defaulted to the previous input. For example if one connects a keyboard CV to IN #1 then this CV is echoed on the two others voices. But if one connects three different CVs on the three inputs, then each voice is only driven by the corrsponding input." - Yves Usson

Assembled with:
3 Octave Switches (1 per Voice)
3 Semitone Switches (1 per Voice)
12 Switchcraft Jacks
24 ga Mil Spec Wire
Polyester Film Capacitors
Metal Film Resistors
Double Plated PCB with Soldermask
MOTM Power Connector
Runs on +/- 15 Volts"

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Testing a Self Built YUSYNTH Voltage-Controlled Modular Synthesizer

Testing my self build YUSYNTH voltage-controlled modular synthesizer - part 1

Published on Jan 3, 2014 xgregcompositionx·12 videos

"I'm testing my self build YUSYNTH voltage-controlled modular synthesizer. Part 1/2. Added some reverb to expand the sound at the beginning. Later there is the raw sound when I played live on CV/Gate keyboard.
The system includes:
3 x VCO
3 x ENVelope generator
2 x VCF (Minimoog & Steiner-Parker)
2 x LFO
2 x Mixer
1 x Sample & Hold
1 x Wavefolder
1 x Saw Animator
1 x Ring Modulator
1 x Patchbay/Multiply
1 x MIDI-CV
1 x Voltmeter
1 x VCA
1 x +15V/-15V Power Supply Unit"

My self build YUSYNTH voltage-controlled modular synthesizer - Making Of

Yusynth Fixed Resonant Filter Bank

via this auction

"Fixed Resonant Filter Bank a.k.a. Moog 904A Clone

Designed by Yusynth

Assembled by Free State FX

Brand new. Highest quality parts available - no compromises. Artfully hand wired in the 5U MOTM / MOOG Format.

Massive, powerful, yet breathtakingly beautiful, the Yusynth Fixed Filter Bank will be the biggest sounding and lush filter in your modular, reagardless the size and complexity. FOURTEEN (14!) Independent filters. Nothing else sounds like it. Lopass Filter, Hipass Filter, and 12 resonant Bandpass filters tuned to specfic (and beautiful sounding) frequencies.

Here is some info from the Yusynth website:

"Although this module is often missing in many modular set-ups, I think a fixed filters bank (FFB) is a really useful module and personally I could not imagine a decent set-up without one. The reference FFB is the 914 module from Moog .

The FFB makes it possible to greatly enrich the sonic palette of a modular system. It is also a key element for the recreation of "natural" and environmental sounds, or of conventional music instruments. Although it evokes the principle of a mere graphic equalizer, it has marked differences. Mainly, the filter Q is higher and the BP slopes are steeper than in a graphic EQ. Furthermore when a control is set to zero, the corresponding spectral band is completely muted.
Complex/entangled rhythms can be created on the fly by multi-band filtering a simple sequence.

I designed this module with the Moog 914 filter bank in mind. Therefore I tried to obtain similar characteristics for the band-pass, low-pass and high-pass filter as in the Moog 914. The original Moog's design uses passive cells based on inductors and capacitors. Nowadays, finding this type of inductors is very difficult and it would cost a lot of money to have them specially wound. This is why I chose to replace these passive components by active components. In order to design band-pass cells using active components (i.e. OP amps) with the same characteristics as in the Moog 914, there are two possible approaches :

the first one is to simulate the inductors using gyrators or N.I.C.s (negative impedance converter). This is a very efficient solution but is very expensive because it requires at least four OP amps to recreate a single band-pass cell with the same Q and -12dB/octave attenuation slopes.
the second one is to replace the passive cell with an active filter. There, the choice of architecture is wide. However, considering the constraints (low number of OPAs to reduce costs, ease of calculation of component values, low sensitivity to tolerance of the components...) the best choice appeared to be the Deliyannis band-pass cell also known as Rauch multiple feedback filter.

The other advantage of using active filters is that the output level of this filter is much higher than that of Moog's.

This module has twelve fixed band-pass filters with -12dB/octave slopes, a low-pass filter and a high-pass filter with -24db/octave slopes. All the filters are resonant with a Q coefficient around 3.7. The gain of each filter is adjustable from completely silent to maximum.

Two inputs (with different gain levels) are provided as well as three outputs : a main output with all filter cells mixed, an ouput with only odd cells and the third output with only even cells. These separate outputs make it possible to use the FFB for creating pseudo-stereo sounds (spacialization).

This module uses not less than 32 OPAs (8 ICs), 125 capacitors, 95 resistors and 14 potentiometers !
The current draw of the module is 70mA both on the positive and negative power lines."

Assembled with:

Switchcraft Jacks
Shielded RG-174 Mil-Spec Wire for Audio Signals
Alpha Pots
Alco Clone Knobs
Active/Bypass Toggle Switch
Bridechamber Panel (currently Sold Out!) - 4 Units wide
Polyester Film Capacitors in audio path
Xicon Metal Film Resistors
Double Plated PCBs with Soldermask
Synthesizers.com Power Connector
Runs on +/- 15 Volts"

More pics of the inside below.

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Mr. Braska Visits YuSynth Part 2

Pictured here:

"See my nice VCO cabin!"

"Then we performed some measurements on another new module, the Sequential Router!" New module? :)

cool tophat

See more pics and captions at SynthFrog

Update via YuSynth in the comments: "Hi, Yes some new yusynth modules will show up on my site by next Christmas : a CV/GATE keyboard controller, a BPM MasterClock, a Sequential Router, a quad VC-panner and output mixer..."

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Quad Octoginta II Yusynth Miscreant from Million Machine March 4 OSC Eurorack Module with Joystick

via Million Machine March

"Since the CEM3340 chip was put back into production, and after seeing what a few other makers have built with them, I decided it was time for me to come up with my own take on this ‘tried and true’ chip! I looked over the various designs on using the CEM3340’s and settled on the Octoginta II.

Now that the VCO’s were sorted and I was able to purchase the DIY PCB’s, I needed to choose a wavefolder design. I like what Yusynth did with Haible’s wavefolder and went with his design here.

The YuSynth design required me to make my own PCB’s. This can be a laborious process if you have not done it before. But I have the process down to a science here in the lab, so I was able to get these made pretty quickly. Taste the Sodium Persulfate in the air, aahhhhh!...

The inspiration for this build and using these particular chips is to try and satisfy my want for a Oberheim OB-Xa! Hopefully Behringer will be able to produce an affordable clone soon, but in the meantime…"

Read the full post on Million Machine March here.

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Tweaking the MOS-LAB System16

YouTube via yusynthman. via Yves of yusynth.
Videos are from the Franco-Swiss meeting (previously posted here).
The last video is a jam session featuring the MOS-LAB and other synths.
Descriptions (in order of videos):
"Our friend Push-pull discovering the magic of a modular synthesizer (MOS-LAB system16) in Oryjen's magical music cave. The system is driven by an external CV/GATE played by our host Oryjen.... yusynth patching and tweaking the MOS-LAB system16 in Oryjen's magical music cave.... yusynth (blue t-shirt) and oryjen (red shirt) blasting the loudspeakers with some untamed cross modulation !!!! The Memotron beneath the modular is crying for some strokes... Push-pull refines the settings of the bass sequence then Spookyman and Oryjen start a jam session :-)"

BTW, check out the MOS-LAB link under MORE: directly below for previous posts. I tag everything that goes up so you can always get more info by clicking on the tab or doing a search on the upper left search box on the site. Search for anything.

Мой модульный синтезатор YUSYNTH.

Published on Dec 20, 2014 sergioavia

"Мой самодельный модульный синтезатор на основе YUSYNTH
Ну вот, наконец я его заснял в работе. Поскольку midi-CV конвертер еще не готов, самодельная клавиатура-контроллер тоже "в процессе", а аналоговый секвенсор только изготовлен и занял свое место в системе, то... обязательно нужно накрутить какую-нибудь неувядающую восьминотную секвенцию, типа "афиллов" или "онзеран"...
Ну, поехали..No midi, no effects. Сплошной аналог.."

Googlish:

"My self-made modular synthesizer based YUSYNTH
Well, finally I photographed him at work. Since the midi-CV converter is not ready yet, homemade keyboard controller is also "in the process" and an analog sequencer only manufactured and took his place in the system, then ... definitely need to wind some timeless vosminotnuyu sequence, such as "afillov" or "onzeran" ...
Well, poehali..No midi, no effects. Continuous analogue .. "

YuSynth VCS3 Filter in Eurorack Format

Published on Dec 18, 2018 Randy Piscione

"This is a demo of a Eurorack version of the YuSynth VCS3 diode voltage controlled filter (VCF). It's a bit long, 6 minutes, but I tried to cover most of what it would do. There's no talking! I don't have a VCS3 to compare this too so I'm not sure if it really sounds like it's namesake filter, but it's still cool either way.

I start off with the usual frequency and resonance demo with one VCO input. At 2:00, another VCO is added. Around 3:00, some frequency modulation, 3:30, resonance modulation, at 4:30, both modulations and we see what it does with something closer to audio rates for modulation.

Other modules featured off-stage include a PM Foundations Synthola Sequencer and two Frequency Central Waverrunner LFOs."

---

YuSynth aka Yves Usson is the designer of the MiniBrute which led to the MicroBrute and MatrixBrute. He is know for his DIY work prior to Arturia, mainly in the 5U format.

Analog Arpeggiator / Groovebox/ Synthbox with Yusynth Metalizer

Published on May 8, 2019 Andreas Remshagen

"A Demonstration of another Synthesizer-Component i`ve made.
It Incudes 4 VCO`s, each contains Square/Sine/Triangle and Saw-Wave. Every Wave can be mixed into the Main Signal.
The VCF is a Steiner-VCF. Two ADSR drives the VCF and the VCA.
The Metalizer can be feeded with each Waveform that is mixed to
the main Signal. The internal clock drives 4 switchable arpeggiator-sections. the arpeggiator can be set from 1 to 10 Steps.
Internal clock and external clock is possible and there is a gate-out. In the arpeggiator-section i added an "Akzentuator", it gives out an adjustable Accent on selectable positions (1-0-1-0; 11-00-11-00; 111-000-111-000 etc) The accent sets the VCF frequency.
The box can also be used as a normal analog-synthesizer with each VCO-CV in and a master/all VCO-CV in

VCO, VCF, VCA and Metalizer-Design comes from Yusynth (www.yusynth.net)
ADSR-Design comes from Rene Schmitz
(www.schmitzbits.de)
The Arpeggiator and the Akzentuator are modified 4017 countercirquits modified by myself"

Bach on Modular Synth BWV 886 praeludium and fuga A flat major

YouTube Uploaded by powerofthetruth on Feb 20, 2012

"Played with a YUSYNTH modular synth, built by Pavel Vancura, Synthservice.cz in Prague.
The synthesizers gives you the great possibility of creating each voice really independent with a different sound. Specially for the fugas this is great. Played and recorded by Daniel Philipp Stotz, see www.DanielPhilippStotz.info. The complete 2. vol of Bach "the well tempered clavier" is recorded (BWV 870 - 893) on 2 CDs, but still I am looking for a distribution."

SYNTHSERVICE YUSYNTH analog modular synthesizer

Uploaded by powerofthetruth on Oct 20, 2011

"SYNTHSERVICE YUSYNTH analog modular synth demo video, shows basic sounds and some interresting patches and sequences"

DIY ARP 4072 Lowpass Filter (ARP 2600)

Preview of latest circuit: The ARP 4072 Lowpass Filter (ARP 2600) MrCaliforniaD

"Version 1.0 is working like a charm.

Once in a proper enclosure, I'll try to record something more substantial.

Thanks to Eddy Bergman for his unconditional support.

You can visit his website to get the schematics. Also check out his other awesome projects while you're at it:
https://www.eddybergman.com/2020/03/s...

I don't sell theses modules. Sorry!"

Some details via Eddy Bergman's website (note the schematic is from YuSynth):

Wednesday, 4 March 2020

Synthesizer Build part-21: ARP2600 LOWPASS FILTER (4072).

The best sounding filter of any I built so far! With verified stripboard layout.

A word of warning right at the start; this is an advanced project, not for beginners. You need to know your electronics and you also need to have a good multi channel oscilloscope.

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Yusynth

Synth.nl has decided to build a Yusynth DIY modular. If you are interested in reading his journey you can find Part 1 here and Part 2 here.

"The last thing we did was to spray a layer of PCB spray on the PCB's to finish them of. This prevents the copper from corroding and will make the soldering easier. We also did this outside. Luckily it was very nice weather. The sun helped the drying process quite well. You can clearly see now that the dark layer of photo sensitive material is gone. Very shiny copper now :) It even hurt my eyes when the sun was reflecting in it. If I counted correctly we did 26 PCB's the last two days." You can find more info on YuSynth here.

CGS202 Serge Resonant Equalizer and Yusynth Fixed Filter Bank Pro

Lower West Side Studio

"A brief comparison of the frequencies controlled by the CGS202 Serge Resonant Equalizer and the Yusynth Fixed Filter bank pro from Lower West Side Studio

CGS202 Resonant Equalizer - https://richsstudioproject.wpcomstagi...

Fixed Filter Bank Pro - https://richsstudioproject.wpcomstagi..."

CGS202 Serge Resonant Equalizer

$370

One of the most sought after modules ever produced the Serge Resonant Equalizer is now available in classic MU format! The CGS202 Serge Resonant Equalizer offers the unique major-seventh band equalization setting itself apart from standard graphic equalizers and opening the door for interesting sonic possibilities.

The CGS202 Serge Resonant Equalizer is available in 1U and 2U widths offering the exact same features in different sizes to suit your modular system’s requirements."

Also available in single width.

Fixed Filter Bank Pro

$495

While most modular systems contain different types of filters many tend to omit the precision sound sculpting tool, the Fixed Filter Bank. The reference standard for Fixed Filter Banks is the 914 module by Moog and while this module is both expensive and difficult to obtain the Yusynth Fixed Filter Bank Pro is an outstanding option based on the same sonic principals.

In addition to all the features of our standard edition Fixed Filter Bank the Fixed Filter Bank Pro offers individual outputs for each frequency in the filter as well as attenuators for each input.

A family shot of YUSYNTH modules

via YuSynth on electro-music.com:

"As I am currently dyeing and varnishing the 66U cabinet of my YUSYNTH DIYed modular I had to move out all the modules and lay them on temporary place.

I realized then that it was a good opportunity to take a photo to show the guts of the beast.

From top to bottom and left to right,
1st row : Random gate (unfinished), Clock Divider, Dual Gated Slew,CV-standards,6 x VCOs,Autobend,Saw-animator, J-H Wavefolder and Dual Min/Max

2nd row : VC-LFO1,VC-LFO2,Dual , Noise and S&H, AC/DC Mixer, Steiner VCF, 2 x ADSRs, VCA, Mixer, Minimoog VCF, 2 x ADSRs, 2 x VCAs, Fixed filter bank

3rd row: VC-LFO1,VC-LFO2,J-Haible Tau Phaser , Dual Ring modulator, Diode ladder VCF, 2 x ADSRs, VCA, Mixer, ARP4072 VCF, 2 x ADSRs, 2 x VCAs,VC-Panner/Mixout (unfinished)"

Evolve - Yusynth Modular Jam

Published on Oct 7, 2014 Modular Cult

"The long pad type sound is the Roland JX-3P clocked by the pulse output of a Yusynth LFO. The JX-3P is running into a Strymon BlueSky set to 100% wet.

All other sounds are created by the Yusynth Modular.

The drums are sequenced by a single 'EVO Sequencer' (prototype).

Thanks for watching!"

Sound demos of the YUSYNTH modular system

You can find a new demo section on YuSynth here. Two tracks are currently featured as of this post:

"Mocking Aqua
This is an attempt to recreate the sound of murmuring water, it's all done with yusynth modules and was recorded in two takes. It was meant as a kind of tribute to "Aqua" by edgar Froese.

Mesmerizing Bounces
This a short demo of the system driven by an external sequencer. It was recorded in one take (no overdubbing), only an external echo effect was added to the raw sound. MP3 compression altered the sound of the cymbal making it sound crushier than it was... Too bad!"

The making of a Yusynth modular

Published on Jun 28, 2015 Vlaca X

"My yellow Yusynth modular build process.
Loooong story in 3.5 minutes :)

Music:
Vlaca - Ring pleasure.
(Yusynth + Alesis nanowerb. One take, no overdub.)

http://vlaca-synth.blogspot.hu/p/yusy...

Thank you Yves! You are the best! :)"

New Yusynth STANDARD CV Module

via yusson on this electro-music.com thread

"I have just published a new YUSYNTH module at my site. It's an utility module that provides two three channels of standard control voltages.
It features OCTAVE rotary switches, SEMITONES rotary switches, 3 buffered outputs per channel and one external CV input per channel (to input a keyboard controller CV for example).

Enjoy it at: yusynth.net, or direct link to the module"

Synthesizers.com Q112 Mixer with Extra Inputs & Yusynth Q110 & Q117

DIY mods via Voice To Spirit

See here for more details on the Q112 (top 2 pics). See here for the Yusynth Synthesizers.com Q110 & Q117 (bottom 2 pics).

"I sold the quad lfo and decided to combine my Synthesizers.com Q110 & Q117 into the yusynth panel instead of building the kit. I used a little bit of my wife’s nail polish remover to adjust the panel and had to get rid of the manual gate on the Q117 and the output volume on the Q110(used a jumper to set it to full). Other than that I am quite happy with the outcome."

via The MATRIXSYNTH Lounge.

Be sure to check out some of Voice To Spirit's excellent videos previously posted here.