MATRIXSYNTH: Search results for Synth Diy Guy


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Showing posts sorted by relevance for query Synth Diy Guy. Sort by date Show all posts

Thursday, March 11, 2021

Tesseract Modular Tukra, FranKinksTides, & Radioactive Eurorack Modules



Playlist:
1. Tukra - audio examples
All audio recorded directly from Tukra's stereo output.
00:00​ - Intro
00:06​ - Drum synth used for melody & bass
00:55​ - Master filter
01:18​ - Triplets and micro grid
01:55​ - Bass line with the drum synth
02:28​ - Pattern with different track length
02:58​ - track 6
03:40​ - Filter & bit crusher
05:21​ - Pattern with a different drum kit on each track
06:41​ - Bye
2. TUKRA - introduction video
This is a brief overview of TUKRA, an eurorack trigger sequencer with audio and midi.
3. TUKRA - basics
Basic edit tools (copy, paste, random, clear)
Encoder's secondary function is always track selection, click it to switch the function.
4. TUKRA
TUKRA playing the same pattern with different songs (each song has it's own settings for the drums, mixer, modulation...)
5. Making melodies with FranKinksTides as function generator
6. Tesseract Radioactive Demo 2
Radioactive is a small but powerful 14-bit analog modelling voltage-controlled digital sound source: a complete voice Eurorack module in 6HP.
See https://www.tesseractmodular.com for more. Modules featured above:



TUKRA is an 8 track eurorack trigger sequencer with audio and midi.
This module can be an ‘all in one’ solution for drums in your rack, but it also has great integration capabilities with other gear (eurorack modules, drum boxes, DAWs, midi devices and midi surface controllers).
There are no submenus, all functions and views are accessible all the time.
Brief overview:
Up to 64 steps per pattern, 64 patterns, 64 parts and 16 songs per project. 64 projects in the microSD card.
Play mode, clock divider, length & choke settings independent per track & pattern.
Step value (can be used for modulation, to define the midi velocity, midi note & drum synth pitch or sample selection).
32 HP



FranKinksTides is a 18hp dual Tides (based on the Swirls pcb layout) with the max/min circuit from Kinks and some switches for sync, quadrature, pll and fm operation . It can be a double/complex oscillator, a dual function generator or any combination of oscillator, Lfo and Envelope generator with lots of cv control plus some interesting cross-modulation and sync features.
some improvements in version 1.2:
-Mix output is now buffered, no signal bleeding on single outs.
-Mix pot controls also the balance of the signals sent to the max/min circuit.
-Uni/bi switch now also determines the signal sent to FM1.
-Clock/sync switch has now a center OFF position, no need of plugging a dummy cable in the Clock1 when using Sheeps firmware to avoid ultra fast sound bank changes.
small improvements for DIY:
-Bigger font size on the pcb.
-Parts renumbered for easy DIY.
original design by Émilie Gillet

Also see the demo by Stefan Tretau here.



Radioactive is a small but powerful 14-bit analog modelling voltage-controlled digital sound source: a complete voice Eurorack module in 6HP. It consists of 3 simultaneous independent oscillators, voltage-controlled AR/ASR transient generator, voltage-controlled pitch slew (glide) and voltage-controlled waveshaper with 5 different modes, but that's just the beginning. Its forte consists of selectable gate/trigger/constant envelope timing signals, rather unique 3-voice polyphonic mode, semitone-quantized mode, voltage-controlled waveform selection, on-the-fly selectable 10Vpp CV input range with offset (except for Pitch), a few experimental features, and then some.
Under the hood, it's a chiptune-inspired wavetable-gnawing sound cruncher with a mind of it's own, and oh boy it's dirty. It could be described as raw and untamed, but it would probably be an understatement.

Also see the Tesseract Nutella demo by Quincas aka Synth DIY Guy here.

Saturday, July 14, 2012

Upcoming Synth Events


BAY AREA SYNTH MEET - This is happening today, right now as a matter of fact.


I/O MONTHLY MODULAR SYNTH MEET - Austin, TX
"Local meetup in Austin for anyone who uses or is interested in eurorack modular synthesizer systems. You do not need a modular synth to attend. Discussion, knob twiddling, & patching are fully encouraged. Please respect other people's gear."


Knobcon Schaumburg IL USA
http://knobcon.com/ and on Facebook

"an evening and a day of electronic music instrument enthusiasm featuring a gathering of people and instruments and workshops for learning and exploration."



TRASH_AUDIO Presents: Synth Event 12

Modular Performances:
Alessandro Cortini
Richard Devine
Lichens (Rob Lowe)
Keith Fullerton Whitman

Synth Market Manufacturers:
4ms
Gear-Track
The Harvestman
Make Noise
STG Soundlabs
Tip Top Audio
Topobrillo

-----
These in via Guy Taylor on Eurorack Synthesizers Facebook

Update: Two more:

Synth DIY UK 2012
"This years Synth DIY-UK meet will be held on July 21st. This is a chance for synth builders and fans to spend a day, or two, talking synth and meeting like minded folk. We've got raffle prizes (all proceeds to charity) and a great Venue. We start at around 10am on the saturday and finish around 17:00 and head off for beer and curry!"


Noisy By Nature in Los Angeles

"A Gathering Of Analog Enthusiasts

Featuring:
Audio & Visual Performances
Workshops
Manufacturers
Beer"

Thursday, February 15, 2018

Descent to Chaos


Published on Feb 15, 2018 Synth Diy Guy

"Cool random piece featuring the Sonic Potions Descent module."

Full kit review video:

Kit Review # 18 - Sonic Potions Descent

Published on Feb 14, 2018

"Kit Review # 18 - Sonic Potions Descent

Complete review of Sonic Potions' 'Descent' Module kit. A dual voltage controlled decay envelope generator in 8hp for Eurorack.

My friend Roman Sowa's awesome jack tool: http://synthcube.com/cart/synth-diy/p...

buy your kit here: https://www.sonic-potions.com/shop/"

Saturday, March 07, 2020

Altura Mk 2 - Building the full kit!


Published on Mar 6, 2020 Synth Diy Guy

"Building the electronics and the acrylic case for the Zeppelin Design Labs Altura MK2, A sonar based theremin style MIDI controller!"

Update:

Altura MK2 Demo - 5 layer gestural improvisation

Published on Mar 9, 2020 Synth Diy Gu

"This is my demo for the Altura MK2 by Zeppelin Design labs! So much fun controlling my modular with hand gestures. I even made a whole piece using it :)"

Tuesday, January 15, 2019

Kit Overview #34 - Majella VVCA


Premiered 23 minutes ago Synth Diy Guy

"A super cool VCA module with velocity CV inputs!
A great beginner SDIY project too :)

Get yours at the best stores in Eurorack DIY, or directly here:
https://majella-audio.com/product/dua...

Background music: Hallowed Beach by Quincas Moreira, available royalty free from the Youtube Audio Library:
https://www.youtube.com/audiolibrary/..."

Note this is the first Majella post on the site. Some audio demos and additional details:




"This is a do it yourself (DIY) full kit! For an assembled module click here.

This kit is designed to be as easy as possible for the DIY community. It is a very good kit for starting DIY’ers because of these features:

through hole components
symmetrical printed circuit board layout
low part count
no trimming/tuning required.
Only basic soldering skills and equipment are required!

Module description:

The VVCA is a dual linear VCA can be used for audio and CV signals.

The VVCA features two individual VCA’s. Each VCA behaves just like any other normal VCA when there is no cable connected to the velocity input. The velocity input offers velocity control over the CV input level, which means: The output level can be controlled by CV and Velocity.

This module uses the 5V rail (16 pin eurorack connector)!

Included items are:

Panel (128.5 x 20 x 2 mm)
PCB
All components (Resistors, capacitors, IC’s, etc.)
Connectors + hex nuts
montage screws
Rack crash protectors
16 pin power cable"

Friday, November 25, 2022

LMNC Euro Filter and VCO demo!


video upload by Synth Diy Guy

"Join me as I explore the Look Mum No Computer Performance VCO and GRR Filter from Thonk that I just built!
Get yours here: https://www.thonk.co.uk/"

LMNC Grr Filter - Build video


"Thonk sent me this cool kit to build!
Get yours here:

https://www.thonk.co.uk/shop/lmnc-111...

Stay Noisy!"

LMNC Performance VCO Build


"Thonk sent me this cool VCO with a built in tuner to build! Get yours here and come build it with me!

https://www.thonk.co.uk/shop/lmnc-122...

Stay Noisy!"

Sunday, December 21, 2008

8-bit noise synth

"8-bit noise synth is my latest project based on HT-8950 voice changer chip. Like my Lo-Fizer and Noise guitar it can produce noises by itself or process sounds like a lo-fi ring modulator, 8-bit pitch shifter and simple guitar synth/digital fuzz. I've also added two body contacts that change pitch or trigger sounds - in particular mode they work like theremin sensors."

demos, video and more on ::vtol::
Note the little Gakken XS-150 keytar guy. :)


::vtol:: diy 8-bit noise and guitar synth - internal sounds demo from VTOL on Vimeo.
::vtol:: diy 8-bit noise and guitar synth - internal sounds demo
my new diy/circuit bent project. Read more -
samoletuvvp.narod.ru/vto/diy/8bit.html"

Monday, April 26, 2010

Trevor Pinch's Vintage DIY Modular Synth



via Inverse Room, via Muff's:
"You guys will dig this.
Some of you probably know Trevor Pinch from his book Analog Days [Amazon hardcover & paperback, preview on Google books], about the history of the Moog synthesizer. Trevor's a friend of mine--we both teach at Cornell U.--and he recently restored his moribund DIY modular that he built in the seventies. Last night he and our friend James Spitznagel (together they are Electric Golem) played a show here in Ithaca, with Trevor on his synth and Jim using a Mopho, Evolver, Orb, Nintendo DS and various iPhone apps.

Oh BTW sorry these are not better photos. I should have brought a DSLR for this but I had a digital rangefinder camera with me that is not so hot at high ISO. Full set is here (for now): http://inverseroom.creotia.com/golem/"

I contacted Trevor Pinch and he had the following to share:

"Hey Matrix:
I built that synth in London in 1973. I used it til 1975/6 in a collective band/scene in London and then in Manchester - we also had a VCS3 and various gizmos from EMS as one of our band knew Tristram Cary, one of the founders of EMS. By the way anyone interested in EMS should check out the half hour documentary Matt Bates made for Australian TV - 'What the Future Sounded Like'. I was a talking head for that movie. It's got tons of info in it and great clips of Hawkwind, music of early Floyd etc [below].

My synth was kinda in storage before being shipped to the States in 1990. It was smashed up badly in the move and I only started work on it again a few months ago when Park Doing here in Ithaca persuaded me to get it going to jam with Johnny Dowd, Richie Stearns, Brian Wilson, and others for a 'Requiem for Analog TV' show we did at Cornell. Since then I've played out with it a couple of times with Park's band, the Atomic Forces, and once with The Electric Golem with Jim Spitznagel.

The schematics come from the hobby magazine Wireless World August 1973. Tim Orr did the design (he was the same guy who designed the EMS Vocoder). I built it 1973. The Voltage Control filter is online [link]

VCO 1 has square, triangle, sine , and variable mark space (I think in the US they call it duty cycle - adjusting the width of the top of a square wave). It turns out the variable mark space is one of the most musically useful controls I know.

It has three frequency ranges from very low to way up there! There are two VCO inputs with 1 K pots to control the voltage in.

VCO 2 has square, triangle, sine, ramp, and pulse outputs. There are two VCO inputs with 1 K pots ditto.

VCO 3 is a six-step sequencer with an incredible frequency range, with each step selectable and tunable. This is the awesome guts of the beast. There are two VCO inputs with one K pots. You feed the sequencer output as an input into the VCO1 and VCO2 and away you go.

There are also the following modules:
2 voltage control amplifiers
2 exponential converters
A keyboard module for operating a resistor chain monophonic keyboard - I abandoned the keyboard as I could never get it in tune and it sounded better out of tune!
I voltage control filter - band pass or low pass output - band pass only is working
I mixer with three channels and two virtual earth mixers for summing and reversal with three channels each,
White noise source and blue and red noise (variable) outputs
Spring reverb.
Envelope shaper. Not yet working
Two preamps. Buggered.
2 very low frequency outputs. Not yet working.
Sample and hold - Never worked!
Joy stick control and circuits with two pots providing variable X and Y voltages.
The joystick is home built by using three pots (design based on the first one that David Cockerell made for VCS3) my killer control for live performance (think Brian Eno and the way he used the joystick on the VCS3 (Putney)). The joystick was beat up terribly in the move and was the hardest single thing to get working and nicely balanced. Read the story of how the pitch and mod wheel were designed for the minimoog in Analog Days! Having a controller that feels right when you play is for me half the battle.

There is an onboard power supply for 240 volts in and 15v plus and minus and 5 volts plus out. Useless in US! So got new power supply built.

The modules are mainly built on plug in breadboards made by a UK company called Electrokit. So when I blow out transistors - happens all the time - I can unplug for easy access. Also I like to leave it open so shaking the instrument shakes the modules and affects the sound and of course the reverb. Opening the black box is my aesthetic.

Housed in hand machined painted aluminium case (wise choice in hindsight as it is sturdy, light and didn't rust!)

Patch bay is banana plugs, wires and sockets (what we used to call banana plugs or Wonder plugs in the UK). US banana plugs are too big - anyone know where I can get the UK banana plugs from as I need more?

If anyone is interested in my early experiences in playing the synth, they are written up in a chapter in a book by Sherry Turkle, Evocative Objects - the reflection is online at a awesome exhibition, "Remix, Rewind and Replay" at Scottsdale Museum of Contemporary Art which I was on a panel for. http://www.rewindremixreplay.org/pdfs/pinch.pdf

By the way, that essay was written before I got the synth working again. In that essay I said the synth had no name. When I unearthed the old schematics to start soldering work I found I did give it a name, "Stray Capacitance". That's what the synth was like - full of capacitance.

The synth truly has a unique sound : the sonic energy is simply amazing. It can cut through like a chain saw on magic mushrooms - everything sort of feeds back on everything else in various unpredictable ways. Its like a live bucking beast to control. Park Doing says I shouldn't call it a synth and I agree. It's more a sometimes controllable sound and noise maker. John Robert Lennon (aka Inverse Room) on seeing and hearing it in action the other day - said how come it just doesn't explode. It's a miracle that it works at all! Its industrial sound is awesome in a punk band and when playing alongside someone with more varied and sweeter sounds (like Jim Spitznagel can produce) it can cut through and complement and attract attention. With the spring reverb it sends you into space. In the early days we also used to use huge tape loops as well.
That's it!

Trevor"

I'd like to give a huge thanks to Trevor Pinch for taking the time out to share this with us and of course Inverse Room for sending this our way.


YouTube via inverseroom — April 25, 2010 —

"Inverse Room interviews Trevor Pinch, author of "Analog Days" and other books about the history of technology, who demonstrates the DIY modular synth he built in the 1970's.

The thing I find really cool about this design is the step sequencer that can be run at high enough speeds to create, in effect, a new oscillator with primitive custom waveforms. And of course there's the total lack of sides to the case--gotta love that, too!"

Saturday, September 10, 2011

Interview with Mutable Instrument's Olivier Gillet

The following interview is by Juan VĂ­lchez GĂ³mez for Hispasonic. Juan sent it my way via The MATRIXSYNTH Lounge. You can find a Spanish version on Hispasonic here. The following interview is posted here in English with permission from Juan. MATRIXSYNTH gets a mention! Thank you to Juan and Hispasonic!

"Hispasonic: This time we are talking with Olivier Gillet, the man behind Mutable Instruments and creator of the famous synth Shruthi-1. He reveals exciting information about his next projects and throws light upon synth design.

JuanVilchez is the interviewer.

Hispasonic: Well... Taking into account that the key questions about the Shruthi-1 have been already answered in the forums, or in the comprehensive documentation of your webpage, I propose that you could speak us about the future of Mutable Instruments... as it seems that some exciting new machines are in the making right now.

Mutable: The exciting new projects:

Next project (september/october): the MIDIpal, a small, inexpensive, MIDI processing
unit, running algorithmic transformation on the MIDI notes (arpeggiation, harmonization, delays) along with more traditional filter/splitter/monitoring things. Something you'll want to stick between anything with a keyboard and anything with an audio out in your studio :) This is the first project that will be industrially manufactured - though the first batch will be available as a SMT kit.

A revision of the Shruthi-1 hardware for the next batches of kits - in particular I've spent quite some time cutting the part count on the filter board.

A new Shruthi-1 filter board (MS-20 clone).

A variant of the Shruthi-1 digital board that will replace all the digital oscillators by 12-
bits sample playback from a SD card (and will probably do sampling too). This will add a new dimension to the "Shruthi-system" = 3 "controller boards" (Shruthi, Sidekick, Sampler) x 7 "filter boards".

Something that will replace, in the long run, the Shruthi-1 - and in which I'm trying to address most of the shortcomings and design decisions of the Shruthi-1. This is a more ambitious, risky, project as I'm trying to squeeze in a lot of very new features, and design it in such a way that some parts of the project can be interchanged, with both a SMT version for industrial manufacturing and still a through- hole variant for DIYers. While avoiding reinventing too much and keeping it close to the Shruthi sound. Ready in 6 months? 1 year? I don't know.

Least sexy but most important thing: establishing an actual company -- at the moment what I do is registered as a "side-business" and while it is very simple paperwork-wise, it adds many constraints to what I can and cannot do, and exposes me to many risks in case of bankruptcy.

Hispasonic: I think that it could be interesting not only promoting Mutable Instruments but you as well, as I find that you're a really talented guy and that you've the most valuable opinions and tastes. Just saying... I perceive that you're a shy person (am I wrong?), but maybe it could be interesting to know more about "the creator".

Olivier: I wouldn't see the point of promoting myself - I don't sell myself, I sell synths, and they can "speak" or rather "sound" for themselves!
Many interesting synthesizer businesses are small, quite often run by one single person, who has to wear both an engineering and marketing hat. Personally, I try to keep my engineering hat as much as possible because this is what I am good at, and because I quite like the values that goes with engineering. Chips datasheets don't cheat, at least not on the first page... I see too much people overhyping stuff in my daily job to want to do anything like that when I am working on my synth projects.

Hispasonic: In Hispasonic we are really proud of our community of synth enthusiasts. Here is a little "window" that is going to be seen by a lot of people. Taking a look into your resumé, we know that we can confidently trust you in regard to software and electronic musical instruments. So... what do you want to say to them?

Olivier: If there had something I had to say to the synth public is that they should try to keep a critical eye and ear when looking at synths - there are so many misconceptions (that I used to have too, until recently!) about synths. Things like:
- "UIs with LCD displays / pages [as opposed to 'one knob per function'] suck" Most people having used the Shruthi-1 agree that the interface is very easy to understand. The ESQ-1 looks horrible with only one data entry slider but it's surprisingly very fast to program. While some knob-laden VAs are horrible to use because everything not directly in the front panel might be hidden behind half a dozen of keypresses.
- "8-bits => chiptune sounds!"
Just because something uses 8-bit resolution somewhere in the signal chain doesn't make it sound like a Nintendo. It's not all black and white: The Fairlight had 8-bit converters ; the Dark Energy uses a sound chip that found its way in some 80s arcade machines. And plenty of other weird combinations inbetween.
- "Vintage synths got their good sound from the vintage VCF chips"
I was fooled by this too, and this is why I invested time in getting some of those chips and building filters with them. My conclusion is that those chips were very convenient because they concentrated many useful functions in a small area (and thus made reliable, smaller polysynths possible), but there's nothing magical in them - gain cells and linear/exponential voltage->current converters in one small package. I won't bother with those things from the past in new designs, because the magic is outside of the chip.
- "Stuff designed by amateurs will always be one step behind commercial products"
I hang around a few DIY online communities (for example the SDIY mailing list) and I am amazed by the expertise and knowledge of the people here. And then it struck me that to the most talented electrical engineers it would be a weird career move to actually work full-time on synths, because there are many other fun things to do with their skills. Somehow I think the most difficult thing for a trained EE to go into making synths would not be the challenge of the work, but the challenge of only applying a very small fraction of their knowledge of the field.

Hispasonic: There is a growing community of people that decide to take direct control and create their own synths from the electronic parts (DIY). Any advice for them?

Olivier: A last thing, and this takes the form of a question: "what makes a good synth/DIY project?". To me, three things:

Understanding the difference between a "project" and a "product"
It took 2 to 3 months to design something like the Shruthi from A to Z.
At this stage you'll have something awesome that you can put in a box, use yourself, post a video to Matrixsynth and be very proud of. But then it will take maybe 5 or 6 months to turn it into a "product", to sort unsexy things like documentation, sound banks, testing on a variety of setups, parts sourcing and validation, more field testing, feature requests from beta testers, etc.
I had changing opinions about whether oscillators, filters, modulations, etc. were the most important element to define the "sound of the synth". In the end, my view on that is that what makes a synth good is the presence, or not, of a "vision" or "plot" about how it should sound like, and then the effort made to ensure that every module contributes to this vision and goes in the right direction.
This is why I believe "design by committees" efforts like the Tyrell from Amazona are a bad idea - "just making the majority happy" is not the sort of vision to build something upon. At least not in arts.
When the designer of a synth has never taken the time to actually listen to its creation, it shows!

Hispasonic: Thank you very much Olivier for some of your time - we know that you are really busy these days - and for really getting involved in the topics treated. We do know that you are not very enthusiastic about being interviewed or talking about your products, as you completely trust on their sound as their best marketing campaign. We can’t wait to hear and play with your last creations. They will give us plenty to talk about, for sure."

Useful links:
Mutable Instruments
Shruthi-1 on Youtube
Shruthi-1 audio demos on Soundcloud
Contact the interviewer:
me@juanvilchez.com http://www.juanvilchez.com

Monday, February 07, 2022

New Erica Synths MK1 vs es.EDU Dual VCA - Build and Demo


video upload by Synth Diy Guy

"Part 2 of the series on Moritz Klein and Erica Synth's educational system! This time we build, calibrate and play the cool dual VCA!"

Part one here.

https://www.quincasmoreira.com/
https://www.patreon.com/quincas

Introducing the mki x es.edu DIY VCA kit

video upload by Moritz Klein



"The mki x es. EDU VCA is simple, yet efficient dual VCA for your eurorack system. It has DC coupled inputs, so you can use the VCA both for audio and CV signals. Inputs of the second VCA are normalled to the first one, which allows to split audio signal to both VCA or control both VCAs with a single CV. A 60 page build manual explains electronics behind the module and provides step-by step build instructions.

RRP: 55 EUR (VAT excl.)
MAP: 69 USD"

Monday, April 15, 2013

Mystery Synth - Korg 700s/770 Prototype?


Published on Apr 15, 2013

"I found this "mystery synth" at a garage sale this weekend. It appears very similar to a Korg 700s, but upon closer examination there are clear differences. The second oscillator has it's own waveform and pitch selector, for example. And the style of sliders and controls are certainly different than those found on a 700s.

If you know anything about this instrument, please let me know!

At any rate it's a great sounding synth!"

This one in via via Dan Goldstein who found the synth. Talk about an amazing find.
Click here for a pic of the inside of a Mini-KORG 700.  Update: also click here for one more.  Note two of the boards appear to match but this mystery synth has one more. I couldn't find any of the inside of a 770 to compare.  If you search for KORG 770 or KORG 700s you will see the controls are similar but different.  With that we are left with two possibilities, this is either a very nicely done DIY synth composed of vintage KORG parts or a KORG prototype that fell somewhere within the 700 series.



And details also posted on gearslutz: "Here's everything I know about it:

I found this instrument on CraigsList, posted at a garage sale here in Las Vegas. The seller said that he'd purchased it on eBay not knowing what it was, and that he believed it was "built by a guy that worked at Ibanez." That was all the provenance that he was able to provide. The instrument was clearly so bizarre that I had to take it home and find out more about it. It does work, mostly, and it certainly has a unique sound despite it's incredibly strange architecture, which I'll describe below.

I opened it up, eagerly hoping for clues about its origins, but what I found deepened the mystery further. As you can see in the photos below, the circuity of this synthesizer is totally discreet. There are some metal can-style Op Amps, namely 741HC and MN131A, which would seem to date this in the early 70s. There are no markings of any sort on the circuit boards, just hand-labeled numbers by the patch points on the circuit boards. I can't find any sort of name anywhere, though the words "Made In Japan" are on the 1/4" output panel.

The architecture of this instrument is incredibly bizarre. It features two standard oscillators. Oscillator one has triangle, square, and sawtooth waveforms, plus a "Chorus 1" and "Chorus 2" setting that seem to be chorused sawtooth waves. Oscillator two features triangle, square, sawtooth, a thinner square wave, and reverse sawtooth. Then there's a third sort of oscillator, which is switchable between noise and what I think is some sort of ring-modulator that operates on Oscillator One. There's a global tuning knob but no fine-tune knobs for the oscillators.

Things get weird after that. There's an attack-release envelope for the VCA, and that's the only envelope you get. There's a resonant low-pass filter and a resonant high-pass filter, but no resonance knob, so you're stuck with a single cutoff control for each filter. The low and high cutoff filters are sort of "ganged" together so that you can't move the Lowpass cutoff above the Highpass cutoff - they move together once they meet, if that makes sense. There's an LFO that seems to be fixed at a triangle wave, and it can be routed to frequency or filter or both, and there's some sort of vibrato delay switch that doesn't seem to do anything. There's also a Repeat switch and speed control that will cause the envelope to retrigger, which is pretty cool. There are some other bizarre controls too, including a "Bright" switch that makes the sound brighter, an "Expand" switch that doesn't really do much of anything, and a "Bender" switch that causes notes to quickly bend up to the pressed key (I remember a similar feature on the Roland VP330, for example).

There's a 3-position sustain switch that goes from "Short" to "Long" and determines if the envelope continues after you've released a key. It works fine, but as soon as you release a key the frequency of the note played drops to some lower, random value. Perhaps the sample-and-hold is not working right.

The cabinet and design is clearly Minimoog inspired, but it's not a Minimoog case. My first thought was that this was a home-made synth of some kind but I'm very doubtful after spending time with it. The silkscreening is very professionally done, the cabinet is all custom-made with interesting angles. There's even a sort of thumb screw on the bottom that lets you lock down the folding-up synth portion of the instrument for transport. Everything about the instrument seems to suggest it was professionally made. The only outputs are a Low and High audio output. There are no inputs at all, no bend wheel or mod wheel, though there's clearly space for such a thing. The lack of basic features (i.e. sustain & release envelope stages, fine tune, resonance amount, etc.) and the addition of unusual features (repeat, bender, etc.) make for one odd combination. And the fact that I can't find any label anywhere makes this a serious synthesizer mystery.

I've owned an awful lot of analog synthesizers and have read decades worth of magazines and web sites, and I've never seen anything like this. Does anyone here have any insight at all into what this might be? Perhaps it's a kit synth from the 70s, like a PAIA design of some kind? Perhaps this was a prototype for a product that never got built? The components date it to the early 70s, so perhaps some company was attempting to challenge the Minimoog and decided against it? If anyone has any information at all on what this could be, I'd sure appreciate it! I'm happy to answer any questions about this synth."


Saturday, November 04, 2017

Erica Synths DIY Bundle II Part 3 : Modulator, Midi-CV, Polivoks VCA, Output.


Published on Nov 4, 2017 Synth Diy Guy

"Part 3 of the special series on the Erica Synths Polivoks inspired DIY Bundle II. The last 4: Modulator, Midi-CV, Polivoks VCA, and Output.

PDF: Suggested Method for building the Bundle: https://www.dropbox.com/s/1ykvnpvy1qk...

Music and Video by Quincas Moreira

Please like, subscribe and support me on Patreon!
www.patreon.com/quincas"

All parts here.

Monday, September 20, 2021

Tukra Video Manual Part 2


video upload by Synth Diy Guy

Part 1 here

"Part 2! featuring fw update procedure, creating a user bank of samples, using the mod matrix, euclidean functions and more.



The Tukra by Tesseract is a trigger sequencer, sample player and drum synth with a unique user interface. More info here: https://www.tesseractmodular.com/euro...



https://www.patreon.com/quincas

https://www.quincasmoreira.com/



Stay Noisy!



Thursday, June 22, 2023

Building the Syncussion Clone by Michigan Synth Works!


video upload by Synth Diy Guy

"Major project ahead! In this video I build the meticulously cloned Pearl Syncussion SY-1 kit from Michigan Synth Works. More info here: https://michigansynthworks.com/produc...

Demo video coming soon!

My Patreon https://www.patreon.com/quincas
My Website https://www.quincasmoreira.com/

Stay Noisy!"

Thursday, December 22, 2022

LXR by Erica Synths x Sonic Potions


video upload by Cinematic Laboratory

"Time for a 'not so deep' dive into the LXR, but with really cool results. I've linked a video manual by Synth DIY Guy who went through all settings because I don't have the patience for walkthroughs and demos. But, wow, this drum synth is something else. When I started this video I assumed it was analog but it's certainly digital and it's a masterpiece. The point is, it doesn't sound digital unless you set the bit crusher to work.
The presets are clearly targeted to the loud and gritty genres of electronic music, but in its core, it's a six voice synth that can make amazing sounds for any genre, including ambient. I am not sure if I can post something before Christmas, so I wish you a great holiday season and I'll definitely see you again in 2023."

Thursday, May 17, 2018

SDIY Class # 10 - Building a dual Mixer with Otto's DIY


Published on May 16, 2018 Synth Diy Guy

"Today we put our Opamp theory in practice, building a super useful dual mixer module for Eurorack, using the excellent Otto's DIY prototyping system.

https://intech.studio/p/?&page=Ottos"

Thursday, December 13, 2018

Kit Overview # 33 Rakit Drum Synth


Published on Dec 13, 2018 Synth Diy Guy

"Building and testing the cool standalone percussion synth kit from Rakit in the UK!"

Thursday, June 30, 2022

The Kraut Rock Phaser!


video upload by Synth Diy Guy

"Erica Synth's new optical Kraut Rock inspired 8 stage phaser for Eurorack! I take it from mono to stereo, from synth to guitar, bass and electric piano.
Thing sounds dope :)

https://www.quincasmoreira.com/
https://www.patreon.com/quincas

Stay Noisy!"

Sunday, November 12, 2017

Erica Synths DIY Bundle II Part 4 : System Overview and Patching Strategies


Published on Nov 11, 2017 Synth Diy Guy

"Part 4 of the special series on the Erica Synths Polivoks inspired DIY Bundle II. Having finished the build, we now look over the whole system and explore some of the implied patching strategies."

All parts here.

Tuesday, July 06, 2021

Tukra Video Manual - Part 1


video upload by Synth Diy Guy

You can find additional details on Tesseract Modular's Tukra here.

"Finally, the first installment of the much anticipated Tukra Manual!
Time Index below!

The Tukra by Tesseract is a trigger sequencer, sample player and drum synth with a unique user interface.

https://www.patreon.com/quincas
https://www.quincasmoreira.com/

Stay Noisy!

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