nonlinear circuits spectrum shaper

video upload by cirtcele

"I'm still learning how to use this thing but here are some excerpts from a patch with Tinkle and FM OP via Product wavefolder both fed into the Spectrum Shaper."

via nonlinear circuits

"36 channel voltage controlled comb filter aka string filter.

This module has some history. In 2018, I was part of a team putting on a show with CellF at the Todays Art festival in Den Haag. I popped down to Rotterdam to visit Dennis (aka Mono-Poly) and his studio of vintage lab gear. Dennis had an incredible patch going centred around a Bruel & Kjaer 36 channel Spectrum Shaper. Listen to his album Testlab to hear how it sounds. I just knew I had to make something like it one day. This type of filter is often called a ‘String filter’, used to emulate stringed instruments tho don’t feel limited by that.

Fast forward to 2026, I read an AES paper by R. Burhans describing his 36 channel comb filter. It reminded me there were some designs in Electronotes, so I looked them up and discovered they were both inspired by and heavily influenced by Burhans, particularly in terms of the comb filter frequencies and spacing. One was a 40 channel version by Ian Fritz using transistor based filters. He had an interesting mod, originally suggested by Lester Ludwig, where each set of 6 filters had a feedback pot. Some screenshots from these articles are at the end of this build guide. The relevant Electronotes issues 107, 115 and 116 can be found online.

The Bernie Hutchins design used 39 regular op amp based filters, along with Ian’s feedback per 6 filters mod and added an inverter so the feedback could be positive or negative (so, centre off). Negative feedback ‘flattens’ the peaks somewhat and smears the sound, positive feedback makes the peaks narrower and higher (if tuned for it, you can make them self-oscillate, see notes). Bernie also added a noise gate on the output, summing 39 channels is always going to be noisy.

CLICK FOR MORE »

A Quantizer packed with Creativity!! // Ziggurat from Acid Rain Technology

video upload by DivKid

"Here's an absolutely MEGA guide to creative and musical uses of quantizers in Eurorack which is our demo of Ziggurat from Acid Rain Technology. Ziggurat is packed full of smart and easy to use features across its 4 channels of quantizing, some features I've not seen on anything else before (hats off to Acid Rain!) but there's lots of patches widely applicable to any quantizer options you may have. I also hope to instill the message that quantizers are super fun even when you have already quantized sources."

via Acid Rain Technology

A melodic playground for your eurorack system

Ziggurat is a 4 channel quantizer designed to turn any combination of control voltage and gate signals into inspiring and unexpected melodies. Ziggurat provides a fresh way to explore harmonic relationships - wandering through different combinations of note masks, input signals, ranges and offsets until the music catches your ear - at which point all settings on the module can be easily saved for later reference

Synthesizers.com Introduces Q210 Complex Noise

video uploads by synthesizersdotcom

Update: videos just released and added above. Note the playlist is in the order released by Synthesizers.com.

Playlist:
1. Meet the Q210 Complex Noise | Synthesizers.com Newest Module
2. A Quick Overview of the Q210 Complex Noise
3. Using Q210 Complex Noise To Clock Q173 Gate Math
4. Q210 Complex Noise Random Gate Discussion
5. A quick Q210 Complex Noise Patch
6. Another Q210 Complex Noise Patch
7. Changing speed of Random Gates on Q210 Complex Noise
8. CHAOS OUTPUT on the Q210 COMPLEX NOISE

via Synthesizers.com

"This is Synthesizers.com's first new module in two years, and we're excited to share it with you: the Q210 Complex Noise.

The Q210 Complex Noise is noisemaker's playground. Though capable of standard white noise fare, the Q210 can help provide you with decidedly boundary pushing timbres, not usually found in your typical 5U module.

Beyond noise, the Q210 is also comfortable generating random gates, which when routed to VCAS or drum sounds, can help launch your next ambient composition into science fiction territory.

Depending on how you approach the module, the Q210 can be a tame texture ready to mix in with a completed track. However if you push it, the Q210 can become the basis of an entire soundscape, especially when paired with filters, VCAS, and envelopes. Sounds both dramatic and explosive are quite easy to conjure."

Drone 3 Raw Sound Demo

video upload by Ghost In Translation

"The audio is recorded straight from Drone to my output module. The audio out of Drone is stereo so I’m using a stereo splitter cable.

I go through the 16 algorithms to showcase how Drone sound.
Then I take another Drone and connect its MIDI out to the MIDI in of the first one, and I demonstrate that Drone can be MIDI controlled.

Drone is going to be released very soon and for sale on https://www.ghostintranslation.com."

DESTINY PLUS DOUBLE Q EURORACK LIMITED REVIEW

video upload by Blush Response

LF-AMP introduction

video upload by Kanawha Music

Well, that's refreshing.

"A tongue in cheek introduction to what's otherwise a rather boring module."

via Kanawha Music

"The LF-AMP module combines two modules in one chassis:

First, on the left, is a precision triangle wave LFO, featuring:

Two pairs of outputs, each with its own amplitude control ('amount' as most would call it);
Direct and Inverted outputs in each pair;
A precision BIAS control for each output which determines the center of the voltage swing;
HI/LO range for rate, for a total range of about 20Hz down to about 1 cycle every minute.
Easy to see rate indicator LEDs showing the positive or negative swing of the output.

Second, on the right, is a high gain utility amplifier for headphones or line level sources, featuring:
Stereo inputs and outputs, with Normalled output for two individual outputs, or signals combined into one stereo jack ('2/MIX')

A bit more about the rationale...this module was designed for use with our Stereo Ensemble instruments. We needed a specialized LFO for our phaser modules, and an amp for final output, so they were combined into single unit. It's the peanut butter and anchovies of the modular world! The LFO output can be reduced down to a very tiny voltage swing, and then precisely located to work with devices needing those conditions...but it can also be used to give an exact range to a VCO, or an exact amount of depth to a VCA, etc. And since there's an inverted version of each output, two of something can work inthe exact opposite direction if desired. There isn't much to say about the amp; it's just a high quality amp for headphones which works to drive line level sources as well, using the LM4580 amplifier chip."

SynTesla CRV540 Cloud Reverb Module - sound test

video upload by SynTesla

"Sound test of the “cloud” reverb currently under development at SynTesla. The module will initially be available in a 5U format. A 3U version will be released later if our customers show interest."

Diving deep into Doppler by Jasmine & Olive Trees, a Eurorack module that makes drums from any sound

video upload by Perceptes and Jasmine & Olive Trees

"In this video, we'll be diving deep into Doppler, a new Eurorack module from Jasmine & Olive Trees that can turn any sound source into a drum! Doppler also has an amazing new mechanism for changing firmware by simply placing an overlay panel on top of the module."

00:00 Meet Doppler 01:13 Patch previews 01:56 Automatic firmware switching 04:28 Module overview 06:18 Noise output 07:09 Kick drum sounds 09:16 Mod control 09:40 Chord mode 11:14 Doppler mode 12:13 FM mode 13:53 LPG (low pass gate) mode 14:57 Snare drum sounds 15:24 Hi-hat sounds 15:39 FM tom sounds 16:13 Chaotic textures 16:36 Full beat with Traffic 20:07 Glitchy percussion 22:49 Different transient sources 26:16 Speech sample as body input 29:44 Chord progression 32:52 Doppler jam

Includes Door, Rubin and Lichen overlays for free, the firmware is automatically swapped when placing an overlay on top of the modul.

Any sound source becomes percussion.

Feed an oscillator, a sample, or any audio signal into Doppler. It shapes it into a kick, a snare, a hi-hat, a percussion, or something else.

It morphs anything into everything. The best friend for Traffic & Prio.

All the processing moves across a continuous spectrum: from a clean signal, to a pitch envelope, into FM modulation for complex percussive textures.

Built on top of our J&OT DSP platform. Future family firmwares can be swapped for free using a simple USB cable and our J&OT web tool, no extra hardware required.

Highlights

Doppler kick engine: delay-line pitch sweep, five depths from –1 to –3 octaves

Harmonic FM: modulator tracks the spectral peak of your input, plus cross-mod chaos at the top

13 chord voicings: major, minor, sus, 6ths, 7ths, 9ths, 11ths via four pitch-shifted taps

Two inputs: Body (main signal) and Trans (transient channel with auto-tuned band-pass)

VCA / LPG modes: toggle via long-press, saved to memory

Independent noise output: dust oscillator whose density tracks input character

CV: on Attack, Decay, Mod, Amount

Smart Attack: noise decay to the left, or long swell to the right, all on one knob

Superbooth 2026 - Dada Machines - EveryDiv

video upload by Stromkult

"At Superbooth 2026, we stumbled upon Nicolas Bougaïeff demonstrating a new module created in collaboration with Dada Machines and Jelle Akkermann. The module is called EveryDiv (short for 'Every Division and Duration'). It brings polytemporal clock generation to the Eurorack format by calculating and generating additional clocks derived from a main clock, paving the way for complex yet quantized polyrhythmic operations."

via Dada Machines

Every Division and Duration is a polytemporal instrument in 12HP Eurorack format.

Play with six different, musically connected tempi.

Create tuplets in realtime via grid MIDI controller.

Time itself as an expressive musical parameter.

CLICK FOR MORE »

STIGMA // Raw Analog Destruction & Tube Self-Oscillation #eurorack #modularsynth #synthesizer

video upload by Arcaico Instruments

"STIGMA is not just a module: it is a destructive, versatile analog sonic organism, powered by real vacuum tubes and designed to disrupt your Eurorack ecosystem.

Built with a flexible True Stereo and Dual Mono architecture, STIGMA offers total control over signal routing, allowing you to process independent sources or shape the stereophonic space with dense, harmonically rich tube saturation.

From Signal Processor to Pure Synthesizer
While STIGMA is designed to filter, mangle, and brutally distort any external source (drum machines, oscillators, full mixes), it also hides an autonomous and unpredictable soul.

By driving the filter into self-oscillation, the module transforms into a fully-fledged solo synthesizer or a formidable percussive sound generator. By modulating the resonance and leveraging the lightning-fast response of its circuitry, STIGMA can sculpt devastating kicks, metallic toms, and thick, industrial percussive textures, saturated directly by the tube stage.

Key Features:
True Stereo & Dual Mono: Two completely independent tube channels for maximum routing flexibility.

Warmth & Destruction: A tube saturation and distortion stage to go from subtle analog warmth to harsh, destructive clipping.

Advanced Filtering: Analog filters molded around the tube character, capable of cutting through the mix or screaming when pushed to the limit.

Self-Oscillation & Percussive Engine: Generate heavy kicks, industrial toms, and unique percussive sounds by using the circuit's self-oscillation as a sound source.

Eurorack Interface: Integrated CV controls for total, dynamic interaction with the rest of your modular system."

STIGMA – A Stop Motion Short Film by Arcaico #stopmotion #synthesizer #modularsynth #eurorack

video upload by Arcaico Instruments

""Every instrument has a manual.
STIGMA has a story."

This short film explores the world surrounding STIGMA, not through technical explanations, but through atmosphere, symbolism and imagination.

Created entirely in stop motion, this short film marks the beginning of STIGMA's journey into the world.

Every set was handcrafted using reclaimed materials, and every movement was animated frame by frame through thousands of individual photographs.

At Arcaico, we believe that instruments can be more than tools.

They can become artifacts, carrying stories, symbols and worlds waiting to be explored.

www.arcaico.eu
info@arcaico.eu"

DUAL LOOPABLE RANDOM VOLTAGE GENERATOR | TEIA Synthesizers DriftLog

video upload by DANIELE

"TEIA Synthesizers DriftLog is a dual-channel random voltage generator that transforms chaos into playable modulation. Generate, loop, lock and sculpt evolving CV with controllable slope, shape, probability and clock-synced randomness!"

0:00 Intro 0:30 Waves A and B 0:45 Clock and range switch 1:43 Shift button 1:58 Probability 2:18 Swing 2:41 Level 3:01 Offset B 3:31 Slope 3:52 Slope switch 4:09 Shape knob and switch 5:39 Loop, start and length 6:16 Reset 6:49 Lock 7:23 Logic A and B 7:57 Save 8:16 First patch 9:45 Second patch 10:50 Third patch"

"The DriftLog from Teia Synthesizers is a dual-channel random voltage generator designed to generate, capture, and reshape random voltages in real time. he two channels—A and B—produce independent voltages, but share a set of shaping controls, namely Slope for morphing between stepped and smooth voltages and Shape for sculpting the curvature of the voltages. There's also a 3-position switch that changes the range of the Shape control from Arc to Peak, Exponential rise to exponential fall, and Bezier ease in to ease out. Each channel can be switched into Loop mode, which allows it to record and replay a selectable portion of its random history using dedicated Start and Length controls.

CLICK FOR MORE »

Using a Zero to Rack Mount a 0-Ctrl, 0-Coast, or Strega

video upload by Sonoclast Music

"The Zero is a eurorack module made to assist rack mounting a Make Noise 0-Ctrl, 0-Coast, or Strega. It includes an attenuverter and a barrel jack breakout to power a Make Noise module with its original power supply."

Zero on the left.

via Sonoclast Music

"The Zero is a eurorack module made to assist rack mounting a Make Noise 0-Ctrl, 0-Coast, or Strega. It includes an attenuverter and a barrel jack breakout to power a Make Noise module with its original power supply.

Here is one next to a 0-Ctrl.

Specifications

The top part of the Zero is an attenuverter. From top to bottom:

The input jack is for the control voltage to be attenuverted.

CLICK FOR MORE »

LilaCRepeater from centrevillage Incoming

video upload by centrevillage

"The 4 Track Looper for live performance.

Comming soon..."

Grip! A legendary compressor redesigned by Izhar Ashdot and Claude AI

video upload by Izhar Ashdot Sound & Vision

"Grip! My take on the LevelLoc compressor. I designed it and let Claude Code handle the coding and debugging."

Additional details from Izhar:

"Here’s a new compressor I built with the amazing help of Claude Code.
It’s a modern and fine tuned homage to the legendary Levelloc.
It sounds like an analog beast but is actually hosted on a Pi Pico 2 microcontroller. "

The most powerful performance MUTE modules for Eurorack: NO BPM Mute Performer Demo

video upload by mylarmelodies

"The great NO BPM hired me to make a demo to explain their Mute Performer system - Mute Performer is arguably the most feature-complete muting system in Eurorack, as it can mute AND mix triggers, audio (clicklessly) and CV, and it can send MIDI to mute external devices too. And you can have up to 72 channels, and you can CLOCK the mutes, so they happen on the beat (or at the start of bars...). And it has scenes, so you can prepare and recall mute groups. And it has several ways of muting and cueing mutes. It's quite a thing."

CHAPTERS:
00:00 What it is and can do
02:21 Clocked Mutes!
03:10 Cueing Mutes
05:00 Mixing Signals
07:10 Mute Scenes
10:13 Solo Mutes

The Mute Performer takes the humble mute function into new and exciting territory.

8 channels of Mutes can be cued, locked, inverted, switched, mixed, stereo-paired, expanded, and arranged into scenes. Scenes can be saved, loaded, banked, clocked, triggered and modulated.

The Mute Performer also supports MIDI, which can be transmitted using a provided 5-pin MIDI Type A to 3.5mm cable.

This allows you to connect external MIDI devices to the Mute Performer, enabling performative control of mutes both inside and out your case.

The Mute Performer alone has 8 channels, but can be expanded up to 72 channels with the Mute Expanders.

CLICK FOR MORE »

6HP of Voltage & Trigger FUN!!! // Ozark from Nekyia Circuits

video upload by DivKid

"Meet Ozark a new 6HP 5 step sequencer, clock generator, dual clock dividers and X/OR logic module from Nekyia Circuits. It's a load of fun for sequencing voltages and trigger rhythms, perfectly placed (for me at least) next to other more complex sequencers for some hands on "extras" for your patches.

https://nekyiacircuits.com

SUPPORT
If you'd like to support work like this and the wider range of what I do, considering heading over to Patreon at / divkid and supporting for as little as $1 a month to gain access to the DivKid Discord community, plus lots of exclusives such as PDF patchbooks, videos and more."

*TIMING INDEX // CHAPTERS*
00:00 Hello & previews
00:46 What we’re doing & feature run down
03:56 Fun with melodic patterns
07:27 Playful & powerful percussion rhythms
11:26 Odd time rhythms & modulation sequencing
14:29 BONUS PATCH HACK - stalling the step motion

DMT STRIA - Paraphonic FM Voice for Voltage Modular - Out Now!

video upload by DMT Audio

"The DMT FM-Voice is a compact, 4-voice paraphonic, 2-operator FM Oscillator voice - great for a wide array of sounds, from retro 80s to futuristic, from percussive kicks, hats and snares, to lush chords, deep basses, and all sorts of weird sound effects in between!

Out now for Cherry Audio’s Voltage Modular!

https://store.cherryaudio.com/modules..."

A NEW KIND OF MODULAR STRING INSTRUMENT | ADDAC System - ADDAC120s FOUR STRINGS SERIES

video upload by DANIELE

"The ADDAC120s Four Strings Series is a eurorack-compatible electroacoustic instrument that integrates physical strings, custom pickups, and electromechanical control within a modular environment."

0:00 Intro
0:26 Headstock and bridge
0:42 Plectrums
2:06 Humbucker pickup
2:35 Quadraphonic pickup
2:59 Ebow
4:22 Rotary exciter
5:06 Strings mute
5:33 Resonators
6:13 Bringing everything together in the frame

Grief Manual

video upload by Lesjamusic

"The Djupviks Elektronik Grief Manual is a Neuron-based wavedestroyer, CV generator and chaos source. This is the full functionality walkthrough, covering every control and how the three internal circuits relate. A separate patch video is coming soon.

Grief Manual is a limited run of just 50 copies, each bundled with a vinyl LP. The module and the record share a theme of grief and loss. Unlike most Djupviks modules it ships pre-built rather than as a DIY kit, in the same spirit as the Bunker bundles.

At its core is a Neuron circuit based on Andrew Fitch's Non-Linear Circuits design, used here with Andrew's blessing. Around it Jonas has built a digital noise circuit related to the one in Mörser, a chaos and LFO circuit of his own design, and a square oscillator that doubles as a modulation source.

Everything interacts with everything else, so patching into it means intervening in a system that is already in motion.

Disclosure: Jonas sent me this module to keep. As always, my assessment of it is my own and entirely honest.

00:00 - Intro
01:35 - Sense
03:06 - Feedback
04:55 - Noise
06:06 - Clock
07:49 - Oscillator
09:40 - Feeding a VCO
11:53 - CV in
13:28 - Amp
13:55 - FInal thoughts"

Stupidly useful, simple & small // Low Fat VCF from AJH Synth

video upload by DivKid

"Here's a fun one and something stupidly simple, really easy to use, small, affordable but way more useful than you might think. It's the Low Fat VCF from AJH Synth, which is a 2HP non resonant (it's supppppeeeer smooth) high pass filter.

I think my favourite thing is using it to pair with low pass filters and to make a variable width band pass filter. It's also nice as a simple "clean up the mix" tool, as a pseudo spectral sidechain, multiband ducking style device or just for performance sweeping low end out of things."

"The Low Fat filter packs a switchable 6dB and 12dB slope High Pass Voltage controlled Filter into a miniscule 2HP of rack space, with a very low power consumption of less than 12mA per rail.

Sometimes there is just too much bottom end in a patch and it swamps everything else, by feeding it through the Low Fat Filter we can remove some of this bottom end to balance things up.

It also makes a great companion to the MiniMod Transistor Ladder Filter and can be placed before or after this in a patch to create a Band Pass filter with a variable passband and a choice of a softly rolling 6dB slope or a stronger 12 dB slope.

It's a great way to populate one of those frustrating gaps in your eurorack modular case with something that is deceptively usefuI.

In Depth

The LOW FAT is a new 2hp Eurorack module by AJH Synth, it's a High Pass filter, with frequency control by either manual pot, and/or external CV with attenuator. It's intended to compliment other filters, particularly low pass VCF modules, in practical tasks such as removing excessive low frequencies, for example when the bass is swamping a mix. It can be switched between 6dB (1 pole) response and 12dB (2 pole) response.

By patching a CV signal to the FCV input it can be voltage-controlled and used musically as with any other VCF. When used in conjunction with a LP filter it forms a fully customisable band pass filter, allowing the range of passbands to be cherry-picked. Feeding in a 1V/Oct pitch CV and setting the FCV pot to a suitable level allows it to track an incoming pitch CV, so the amount of High Pass filtering remains constant as the pitch of the incoming VCOs traverse up and down the frequency range. This can be particularly useful in creating percussive sounds, such as snares and hats, but also on sequenced bass lines. Since it is only 2HP it's a great way to occupy one of those frustrating gaps in your eurorack modular case with something that is deceptively useful, and adds another dimension to the classic bass monster that is the Transistor Ladder Filter."