VAV X-Wave: Wave-Crosser

"X-Wave is a crossover-synched signal switcher for the Eurorack modular system. It's simple to use (no knobs in sight), but it's also very powerful!

X-Wave has two Signal Inputs (conveniently named SIGNAL 1 IN and SIGNAL 2 IN). It has only one OUT, though, so it is forced to choose between the two signals you give it. To do this, it listens to SIGNAL 1 and decides if SIGNAL 1 is positive (as indicated by the little +).

If SIGNAL 1 is positive, it sends only itself to the OUT jack.

However, if SIGNAL 1 is negative, only SIGNAL 2 is sent to the OUT jack (as indicated, again, by the little -).

So, if you feed two different waveforms from a VCO into SIGNAL 1 and 2 IN (pulse on 1 and saw on 2 work very well together, for example), the result will be a wave shape that cycles between half of each waveform you provided. If you use a pulse for SIGNAL 1, you can also create wavetable-like effects by varying the pulse width of your pulse wave on your VCO.

There are two other functions on the X-Wave that greatly expand its capabilities:
You can connect a third signal to the + DETECT IN jack as an external control of the switching action. This will make X-Wave stop listening to SIGNAL 1, and listen only to the 3rd signal This is very useful for using a pulse wave with PWM to "scroll" between two other waveforms from the same VCO, inserting sub oscillators to toggle between full cycles of SIGNALS 1 and 2, hocketing effects via use of a sequencer or gate divider, non-synched interleaving and switching effects, and voltage-controlled A/B switching or muting.

You can also invert the polarity of SIGNAL 2 using the provided toggle switch. This can be used to correct unfavorable polarity alignments between SIGNALS 1 and 2 or can also be used to turn X-Wave into a full wave rectifier or external-voltage-controlled inverter if you plug the same signal into both SIGNAL IN jacks.

X-Wave can pass signals down to 0hz (DC) so it can also be used to process LFOs, Envelopes, CV Sequences, and 1V/Octave signals. It probably has other uses I haven't thought of!

X-Wave is 4HP and uses Burr Brown op amps for the main signal path alongside other high quality Texas Instruments ICs for other duties. X-Wave is not a bi-directional switch, so please be aware that the IN and OUT jack labels should be followed when patching. X-Wave uses a high impedance of 1M (10x the typical 100k) for all inputs, so multiple units can be connected via stacking cables/passive splitters (up to 10 inputs can be paralleled while still maintaining traditional Eurorack input impedance standards)."

VAV N-Wave: Middle-Out Waveshaper

video upload by Magical Synth Adventure

"Join me as I take the @control_voltage VAV N-Wave Middle-Out Waveshaper for a spin!

The N-Wave is a really imaginative waveshaper. Some waveshapers might fold over the peaks of an incoming waveform, some might rectify them - squaring things off like a fuzz pedal. N-wave keeps the peaks of waveform - like the top and bottom of a saw wave - intact, and instead lets you shape and turn up on the volume on a section in the middle of the waveform - leading to unique tones. This is especially true, as you can vary the width of this middle section!"

video uploads by control_voltage

Playlist:

1. VAV N-Wave: Step Sequenced Threshold

One fun live performance (or studio) use for the N-Wave is to connect a Step Sequencer on the Threshold CV and generate different timbres for each step in a sequence. These act as accents and add a lot of life and feel to your sequences and the feel can easily be changed on the fly using something like a Joranalogue Step 8 as your source of steps.

2. VAV N-Wave: Threshold Ring Modulation

In Part 2 of the VAV N-Wave Video Manual, we look at using the threshold control and bipolar vca cv to create new waveforms that have a mixture of normal and ring modulated (quadrature) segments.

3. VAV N-Wave Mangles a Triangle

Here, the N-Wave does quite a number on an unsuspecting triangle wave with the help of some nearby modules. N-Wave is kind of like that one kid's house where everyone hung out and cooked up weird DnD campaigns or something. But for modular signals.

"N-Wave is a novel waveshaper for the Eurorack modular format. Unlike traditional wavefolders and clippers, which operate on the peaks of a waveform, N-Wave leaves peaks intact. All you need to expand your sound palette greatly is a VCO signal and a few twists of the knobs!

Using its internal bipolar VCA (aka four quadrant multiplier, aaka ring modulator) you can apply gain reduction and polarity inversion to an inner portion of the wave slope that you define with the THRESHOLD and OFFSET controls.

All functions can also be controlled via control voltage inputs. LFOs, Audio Rate VCOs, ADSR Envelopes, 1V/Oct signals, sequenced voltages, sample and hold signals, noise, and sub octave signals are all very good choices and can produce results ranging from very musical to very strange. An external detector signal can also be applied if you don't want to trigger the detector on the waveform you're modifying.

If you like, you can also use N-Wave as a high quality bipolar VCA, attenuverter, or ring modulator with the THRESHOLD set to maximum and dynamically mute the effect by applying 0V or a negative voltage to the threshold either using a sequencer or manual control, which allows for hocketing and rhythmic effects.

N-Wave can also operate all the way down to 0hz (DC), so, in addition to audio, it can process LFOs, envelopes, 1V/octave sequences, and any other signal that varies amplitude over time (Sorry, square waves and pulse waves. Your super-sonic rise times are hard to shape in an audible way, but you do work well as control signals).

N-Wave is 10HP and uses Burr Brown op amps for the primary signal path alongside high quality Texas Instruments ICs that are carefully chosen to best fit their roles in the circuit."

disting NT - Transient Detector

video upload by Expert Sleepers

"A demo of the Transient Detector algorithm, added in disting NT firmware v1.15."

VITA SYNTHS

video uploads by Vitamin AH3PCm

Playlist at the time of this post:

1. ADS BD - VITA SYNTHS - Sound Demo

Sound demo of the VITA SYNTHS Modular Algorithmic Bass Drum Eurorack Synthesizer ADS-BD with no effects, accompanied by the VITA SYNTHS Modular Algorithmic Closed & Open Hi-Hat Eurorack Synthesizer ADS-HH and Behringer PRO-800.

2. DR-SEQ-64 Drum Sequencer – Quick Pattern Edit Tutorial

A demonstration of the DR-SEQ-64 module by VITA SYNTHS, showing how to:

delete an existing pattern,

create a new pattern,

save and later load a pattern.

The video also shows that an unsaved pattern is not lost if the module is powered off unexpectedly, and it will be restored when the module is turned on again. This feature helps prevent loss of unsaved patterns.

CLICK FOR MORE »

Rain City Modular SCS-X Advanced Clock Parser

New from Rain City Modular

"The SCS-X is a dual multiplier/divider module in 3U/6HP. Each section can multiply and divide a clock source up to 64x. Clock sources include internal clock, Rain Sync bus clock, external clock, or the output of the other section. When set to 'Musical' mode, the output can range in musical divisions from 32nd notes up to 2 bars in length.

Advanced patterns can be created by setting a frame length from 1-32 steps, and number of active pulses per frame. You can manipulate the active pulses through various parameters, including the amount the pulses spread across the frame, and the rotation of the pattern relative to the start of the frame. When spread is set to maximum, the SCS-X acts as a euclidean sequencer. Set the patterns in motion with a randomness function that varies from frame to frame.

Specifications

Format: 3U 6HP
Display: 16×8 custom LED dot matrix (per section)
Inputs: Clock In Jack, Reset In Jack (per section)
Outputs: Mul/Div Output Jack (per section)
Connections: Rear sync bus in and out
Power Consumption: Up to 85mA on +12V / 0mA @ -12V"

AI250 BXR Eurorack Test Equipment Demo Video

video upload by AI Synthesis

"The AI250 BXR is a eurorack module inspired by vintage nuclear test equipment. It can be used as an audio mangler, cv generator, and VCO. The BXR is a nod to vintage Boxcar Averagers, which were designed to acquire and analyze fast signals. The AI250 specifically replicates the real-time mathematical portion of a Boxcar Averager System, and processes audio or cv signals against either another signal or its internal v/o variable wave-shape VCO."

AI250 BXR Eurorack Test Equipment Build Video
video upload by AI Synthesis

Press release follows:

Portland, OR, USA September 2, 2026 – New for Knobcon, AI Synthesis has released the AI250 BXR in both a built and guaranteed version, as well as in kit and PCB/Panel format.

The AI250 BXR is a eurorack module inspired by vintage nuclear test equipment. It can be used as an audio mangler, cv generator, and VCO. The BXR is a nod to vintage Boxcar Averagers, which were designed to acquire and analyze fast signals. The AI250 specifically replicates the real-time mathematical portion of a Boxcar Averager System, and processes audio or cv signals against either another signal or its internal v/o variable wave-shape VCO. The internal VCO has 11 different voltage select-able wave shapes and can be played v/O.

It's also our first digital module, and runs on the Daisy Patch.

Depth: 39 mm
HP: 14
-V mA: 11mA
+V mA: 120 mA

“In the year 2000, I was in college and obsessed with modular synths, but could barely afford to eat. I knew it was possible to build your own synth, but there wasn’t anyone, or anywhere to turn to for advice. In the past decade, much more information has been published online, and in 2013 I started down my path to DIY modular. Even with all of the information online, there still lacked a single, simple, comprehensive guide for those looking to build their own synthesizer. I want AI Synthesis to be that guide. Prior to building my own synth, I was a dreamer, after building my modular, I felt I had awoken. I want to help others do the same.”

-Abraham Ingle

Founder, AI Synthesis

In addition to providing step by step build instructions, schematics, and circuit explanations, the site also includes a guide for getting started in modular synthesis, and a series of DIY Guides, with information regarding how Resistors actually work, and how to integrate a $26 scope into your Eurorack system.

Pralaya by Senza Testa

"Limited to 10 copies, Pralaya on purple irredescent vinyl + limited edition 'pralaya' module."

Thought this was interesting. Eurorack modules coupled with vinyl on BandCamp.

"The module is strictly limited to 10 copies with purple and gold panel. A chaotic, SLOW, CV generator that acts both as a regular LFO and chaos engine. A different version of the "Tangram" module released on DE. Many values has been tweaked to make this an individual and one time release. Comes with Senza Testa and Djupviks elektronik stickers.

Option for cassette box instead of vinyl now availbale."

CLICK FOR MORE »

What the Këkht Aräkh is a "Switched Capacitor Filter"? - Djupviks Elektronik Faidros Demo

video upload by Kronofonika

"I still haven´t quite figured out how a Switched Capacitor filter works, but who cares?! This is my demo of one of those, a limited second edition of Faidros by Djupviks Elektronik. There is a brief moment where I seem to mic up all colours and metal shades there are in this film, my prompter was not doing me any favours today.

The correct colours available is this one above;

20 exemplars in Purple, yellow and Fools Gold (sort of silver)
20 exemplars in Blue and Proper Gold™.

They wil be available to buy from Djupviks themselves here:
https://djupviksaudio.bandcamp.com/

Green Mod:
https://www.green-mod.com/

And Hylin Devices:
https://hylindevices.com.au/collectio...

I don´t really think I need to tell you this, I´m sure you know how YouTube works, but feel free to metaphorically 'jump around' in the film. I have prepared what one in the literarary and motorcycle gang world call 'chapters' to make it easier to navigate.

00:00 - Intro (duh) - What is a Switched Capacitor Filter?
01:54 - Some kind of Module breakdown, what's what?
04:31 - Using a separate clock source
07:04 - Weird space sounds
08:45 - There's an Album as well???"

OAM's Patience - A Eurorack LFO Module With a Cycle Rate That Can be Set for Decades

Folding & Unfolding Sine Waves w/ Patience and XPO video upload by Olivia Artz Modular



via Kickstarter

"Patience is an LFO that allows you to set the duration of a change in terms of seconds, minutes, hours, days, month, years, or decades.

Our thinking

Eurorack is widely considered to be an esoteric and expensive way to make music. That’s one framing. Another framing is that Eurorack is a mid-90s platform for modular electronic art that lasted. VRML came and went. RSS flourished and rescinded. Web pages don’t really use HTML anymore. But Eurorack is still. It is a time-tested and community-driven foundation for building conceptual art. For installation art. For slow art. In these contexts the modules that you already have can transform in meaning.

For instance, a clock divider may be used for tracking musical time and for building up musical rhythms. But if your clock divider has primes as an option and you trigger it once a day, the 7’s output will give you a pulse a week. Suddenly you’re patch-programming a calendar. You’re now keeping track of time on the scale of years. You’ve moved from the music of humans to the music of the seasons.

This is where Patience comes in. To help your patches operate at these time scales we made an LFO capable of making a single modulation over the course of hours, days, months, years, or even decades.

Why me
For more than twenty-five years I’ve been studying, designing, and programming systems for slow sound art. Under Pauline Oliveros I studied and practiced deep listening. I worked with Seth Cluett on glacial multi-channel performance systems. I’ve cared deeply about slow art my entire life. Patience is an expression of this and I will give it everything I have.

Why Kickstarter
If we know up front that we have guaranteed orders for Patience we can afford to dedicate the time that this idea deserves. Refining the design, circuitry, software, and assembly process. This is the only way we can foresee making the best possible version of Patience, so here we are.

CLICK FOR MORE »

Gieskes G2399E Eurorack Delay

video upload by Gijs Gieskes

"https://gieskes.nl/eurorack/?file=G2399E

0:00 1v Octave buffer looping
2:18 Explanation
3:30 Reverse DC motor pitch shined by LFSR2r
4:06 Randomly playing
5:36 Phasing VCOFan
7:26 VU Perc pitch shifting

PT2399 based eurorack delay module."

CLICK FOR MORE »

Isobar Industries Serratus is Completely Unhinged Madness

video upload by Metamyther and Isobar Industries

"Isobar's new module Serratus features 9 comb filters and 9 mutations, which combined with deep sound sculpting parameters, provide completely unparalleled sonic exploration. Make drones, noisy blasts, and even demented choirs with this beast of a module. Required viewing for fans of the Vhikk X, Befaco Oneiroi, or noise, industrial, and dark techno of all kinds."



A matrix of resonant delay bodies and mutations. Serratus weaves nine comb algorithms against nine distortion, saturation, and mutation processes, with each intersection morphable in real time. Chaos and generative modulation treat the whole system as a living organism, while independent routing places filter, distortion, and reverb before, inside, or after the feedback loop, sculpting everything from string plucks and resonant percussion to frozen spectral drones and chaotic self-generating textures.

CLICK FOR MORE »

Melt – The Core Ingredient

video upload by u-he

"MELT is a four-pole analogue low-pass filter module for Eurorack. Designed with a variable character and an extensive feature set, MELT is the ideal final stage for a traditional synth voice!
Pair MELT with your favourite oscillator plus a few modulation sources, and you have the foundation of a complete monophonic synthesizer.
The unique CORE TEMPERATURE control lets you adjust the character from soft to truly wild!"

"MELT analogue low-pass + band-pass filter with character...

An analogue filter module for Eurorack systems with an extensive feature set that makes MELT ideal as the final stage in a traditional synth voice: Pair it with an oscillator plus a few basic modulation sources, and you have the foundation of a complete monophonic synthesizer. MELT's low-pass and band-pass outputs can be used in parallel for a wide variety of tones, and the unique CORE TEMPERATURE control adjusts the character from mellow to truly wild.

'Modulate the modulation' using the built-in VCA in the FM1 cutoff CV path. A sequenced or stepped random CV modulating envelope depth here can add interesting dynamic motion to a bass line, for instance.

CLICK FOR MORE »

This Eurorack filter has AUTO DYNAMICS! // Flow 3 from Joranalogue *MEGA DEMO*

video upload by DivKid and Joranalogue Audio Design

"As we'd expect from Joranalogue, they take inspiration from classic, seemingly simple functions and turn them into musical and technically impressive devices. Flow 3 is a compact filter that builds upon on the idea of an auto wah, it's a filter with 'auto dynamics'. There's on board modulation, that can modulate itself or your modular system, stave variable filter outputs, CV over everything and an easy to play with layout in 6HP."

Update: Press release follows:

Joranalogue Audio Design announces availability of Flow 3 auto-dynamic filter module for Eurorack that sounds bigger than it looks

STEKENE, BELGIUM: having made its impressive-sounding debut during a showcase at SUPERBOOTH26, May 7-9, FEZ-Berlin, Germany, high-quality Eurorack music synthesiser modules-maker Joranalogue Audio Design is proud to announce availability of Flow 3 — an auto-dynamic filter that sounds bigger than it looks, thanks to the novel variation on the classic state variable filter topology that lies behind its compact 6 HP panel — as of August 25…

Firstly, Flow 3’s core integrator saturation of its simultaneous — low-pass (LP2), attenuates frequencies above the filter frequency (or cutoff) at -12 dB/octave and self-oscillates at a phase of 180°; bandpass (BP2), selects a band of frequencies around the filter frequency (but below and above that the attenuation slope is -6 dB) and self-oscillates at a phase of 90°; and high-pass (HP2), attenuates frequencies below the filter frequency at -12 dB/octave and self-oscillates at a phase of 0° — outputs provide for a sound that is clean yet distinctive.

RESONANCE response is exceptionally smooth — it, too, can easily reach self-oscillation (at higher feedback levels), the temperature compensation and exact calibration effectively transforming Flow 3 into a reliable quadrature sine/cosine VCO (Voltage-Controlled Oscillator) with tight pitch tracking.

The ace up Flow 3’s sleeve, however, lies in its auto-dynamic nature — helpfully highlighted by the non-erasable AUTO DYNAMIC FILTER graphic positioned across that compact, clean-cut 6 HP panel. After all, it is a filter that can modulate itself, achieved by a combined DECAY generator/envelope follower circuit controlling the filter frequency over an adjustable range; either fire decay envelopes from external triggers, or flip it to AUTO mode to follow along with the incoming signal’s amplitude envelope (or both, simultaneously).

Saying all that, then, creating heavy-hitting analogue kick drum sounds becomes a breeze, but, with a bit of patching, Flow 3 can even be used as a spectrum splitter (or crossover), cleanly separating the full audio range into low and high portions, for dual-band signal processing — perfectly possible thanks to the Linkwitz-Riley filter response at minimum resonance.

Ultimately, users of Flow 3 can clearly get carried away as the Eurorack module concerned creatively takes the old auto-filter concept to new voltage-controlled heights, hearing for themselves exactly what the fuss was all about at that impressive-sounding SUPERBOOTH26 showcase!

Coming complete with a 16-to-10-pin Eurorack power cable, two black M3 x 6 mm hex screws, two black nylon washers, and a hex key, Flow 3 is available as a 6 HP module — measuring 128.5 mm (H) x 30 mm (W) x 52 mm (D) with a +12 V: 45 mA/-12 V: 45 mA maximum current draw, reverse polarity (MOSFET) power protection, 100 kΩ impedance inputs and 0 Ω (compensated) impedance outputs — through Joranalogue Audio Design’s growing global network of authorised dealers at a MSRP (Manufacturer’s Suggested Retail Price) of €215.00 EUR or $225.00 USD.

Check with dealers on the right.

CLICK FOR MORE »

phase fiasco eurorack modules

via phase fiasco

Skalman

240dl

[i]

meteor shower

CLICK FOR MORE »

[$10] DIY eurorack modular synth MIDI to CV rev2 | 2CV 8Gate , Arduino nano based

video upload by HAGIWO

"My 92nd original eurorack modular synth DIY projects.
MIDI to CV rev2 , Arduino nano based 2CV 8Gate.

working documents (schematics)
https://note.com/solder_state/n/nba23..."

nonlinearcircuits Dichotomy Paradox 1

video upload by cirtcele

"Updated version of Divine CMOS. Wonderful module for harmonically rich sounds or use as a complex CV patter and gate generator. Thought the LEDs were superbright purple but turned out to be a mild light blue."

via nonlinearcircuits

"This module has been thru a few cycles. The original idea for the design is from an article in Electronotes EN#98 by Lester Ludwig, spectacularly titled ‘A Square-wave Frequency-division Sub-octave Cross-product Module, it’s relationship with Lie algebra, and other related processes’ or more simply known as The Cross Product Module.

The frequencies of two VCO signals are separately divided by /2, /4, /8 & /16 ratios. The corresponding divisions are ANDed together and the results, along with all the raw divided frequencies are mixed together in various ways. You end up with a very harmonically thick, animated sound.

I did a full bloat CMOS (Ludwig’s design was TTL) version for a 4U panel back in 2008 or so, but changed the AND gates to XOR gates for a more ring-modulated effect. Then a minimal, slimmed down eurorack version, called Divine CMOS. This just used the XOR’d signal and outputted a signal determined by the pots.

After some requests for an expanded version, I re-visited the design.

CLICK FOR MORE »

7555VCO 1

video upload by cirtcele

"Wide ranging sawtooth VCO with the hardest hard sync around."



via nonlinearcircuits

"Not the most exciting name, I simply wanted a 4HP sawtooth VCO to sit next to the Spectrum Shaper.

It is based on the Utility VCO in Electronotes EN67, which was based on designs by R. Tenny (Electronic Design 11/10/75), J.L. Brice (Wireless World (6/76) and others.

It tracks very nicely, turn the CV pot to max for 1V/oct, ranges from approx 10Hz to over 100kHz and supplies 10Vp-p sawtooth and square waves.

The Sync is the hardest of hard syncs around. I left out the capacitor usually used to turn sync signals into a pulse, so if you feed a gate or slow CV signal into Sync the VCO simply stops, think of it is a bonus VCA. Of course, if you use an audio rate sync signal, it works as normal.

It is a pretty easy build. not many parts. Do not mix up the BCM847 and BCM857 dual transistors, see the build notes for where to install a 1k tempco."

Synthesizers.com First DIY Kit is HERE!! The Q109 Envelope Generator Kit

via Synthesizers.com

"We're so excited to share with you the Q109 Envelope Generator DIY KIT!!

The Q109 Envelope Generator is one of the basic modules every synthesizer must have.

It generates a voltage envelope in response triggered by a gate signal from a keyboard, oscillator or other source.

The envelope voltage is used to control amplifiers, filters, oscillators and other modules.

The operator has complete manual control over Attack time, Decay time, Sustain level, and Release time.

A manual gate button can be used to trigger the Envelope Generator at any time, and an LED gives a visual indication of the output level."

TTMC Voltage Controlled Reverberation MK2 Card , Buchla Easel Command , Feedback test

video upload by Tokyo Tape Music Center

https://tokyo-tape-music-center.com

Politek University Turin Interview Superbooth 2026

video upload by Take the Fear out the Gear

"Hi everybody this time we bring you the Politek University Turin Interview Superbooth 2026"

This appears to be the first post to feture Politek University Turin.