Schlappi 100 Grit, AntiMatter BrainSeed, & BASTL Instruments Dark Matter

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

Three listings from supporting member brian comnes on Reverb here.

Instruction manuals for 100 Grit & BrainSeed pictured below.

"The 100 grit is a distortion, VCA, and low pass filter module with 8 brass touchpoints.

Features:

8 brass touchpoints
2 inputs to transistor core low pass filter
Voltage control over frequency, resonance, and gain
OTA VCA with soft saturation characteristics
Distortion circuit based around a vintage headphone amplifier driven into instability
Three position x100 gain switch with off, on, and momentary on settings
Each input and cv input is normalled to a different feedback path (6 total)
Seperate outputs for the VCA and distortion
Can operate as a vintage voiced VCA and LPF or a screaming distortion and noise effect
All analog design"

CLICK FOR MORE »

Oddment ODD-1 Build Update & Demos

video upload by oddment

Demos

video uploads by oddment

Playlist:
1. ODD-1 Overview: Playheads

For a long time now we have tried to live by the words of the great Michael Bolton from the movie Office Space, "why should I change when he's the one who sucks?" But language evolves, and unfortunately, the word “grok” has taken on associations that are problematic. Oddment has evolved too. Starting from one quirky product idea, in 3 years we have grown and are now ready for manufacturing and fulfillment of this product, with ambition to make it the first among many. So with much consternation, we have decided to drop the name groc. When we thought about a new name, we thought that what we have is a little unusual, perhaps a little outside the norm...you might even call it, the ODD-1. This is the first in a series of videos to show all of the ODD-1's functions in more detail. In this one we show off half of the encoders that control the granular synthesis engine - the PLAYHEADS function. Here you can control the level, starting point, tuning (aka pitch adjustment) and playback speed for up to 4 different granular playheads. The auxiliary functions available on the touch screen introduce random variability in different ways.

2. ODD-1 Overview: Grains

This is the second in a series of videos to show all of the ODD-1's functions in more detail. In this one we show off the second half of encoders that control the granular synthesis engine - the GRAINS function. Here you can control the size, spacing, left-right placement, and grain window shape. Each control also has a related function, introducing grain size variability, spacing jitter, binaural scatter, and a front-back bias for the window shape. The auxiliary functions available on the touch screen control a bandpass filter that can be randomized per grain and adjust whether grain size is regulated in the source sample or in the output signal, which can have a big impact on sound characteristics.

3. ODD-1 Overview: 03 Envelopes & Time Path

This is the third in a series of videos to show all of the ODD-1's functions in more detail. In this one we show off the ENVELOPES function. Here you can control the note amplitude envelope and timing, access 3 envelopes that can be used as modulation sources, and use our unique TIME PATH feature to dynamically adapt the playback speed.

4. ODD-1 Overview 04: Sample

This is the fourth in a series of videos to show all of the ODD-1's functions in more detail. In this one we show off the SAMPLE function. Here you can choose a sample from the factory library or user-uploaded samples, control the playback mode and the section available for granulation, play and hold notes, set loop points and interact with pitch, tempo and channel information of the sample. We also show the auto pitch and tempo alignment features.

5. ODD-1 Overview 05: LFOs, Macros, Patching

This is the fifth in a series of videos to show all of the ODD-1's functions in more detail. In this one we show off the LFOs, Macros and how to create modulation connections. There are 4 LFOs, 3 Envelopes, 4 Macros (assignable knobs), 4 Control inputs and MIDI information that can all act as modulation sources. Any parameter on the device is a parameter destination. Unlimited connections are made by holding down a destination parameter and then pressing or twisting a modulation source.

6. ODD-1 Overview 06: Filters, Saturation, Echoes

This is the sixth in a series of videos to show all of the ODD-1's functions in more detail. In this one we show off the Filters, Saturation and Echoes modules. Two filters and two saturation modules per voice, both with multiple types of processing and modulatable parameters, allow for transformation beyond the granular engine. Two echoes sections with filtering and distortion in the feedback loop and fully modulatable parameters make ODD1 worthwhile just as a modular effects rack!

7. ODD-1 Overview: 07 Layers

This is the seventh in a series of videos to show all of the ODD-1's functions in more detail. In this one we show the dual Layer functionality. Essentially the entire system is duplicated so the ODD-1 is like having a dual modular systems, each with a polyphonic granular engine feeding two filters and two non-linear processors per voice, with 3 envelopes, 1 time path, 4 LFOs, 4 Macros and a independent modulation matrix per layer. In these examples we also remind that granular can easily do subtractive-style synthesis when using a basic waveform as the source sample.

8. ODD-1 Overview 08: Reverb & System

The final video in our eight-part series on the ODD-1's functions focuses on the upper-left row where we have global volume, system-level reverb and can work with banks of patches.

The reverb is a classic matrix-style parametric reverb. Think of it like a whole set of interacting delay units with slowly modulating delay times. Ok now that you have that in mind, that's it, that's what it is. It sounds sweet.

If two layers of modulating, granular goodness with a fantastic reverb on top wasn't enough, how do banks of patches to store every twist and connection sound?

And from their newsletter:

What’s in a name?

For a while now we have tried to live by the words of the great Michael Bolton from the movie Office Space, "why should I change when he's the one who sucks?"

But language evolves, and unfortunately, the word “grok” has taken on associations that are problematic.

Oddment has evolved too. Starting from one quirky product idea, we have grown in three years and are now ready for manufacturing and fulfillment of this product, with ambition to make it the first among many. And with much consternation, we have decided to drop the name groc.

When we thought about a new name, we thought that what we have is a little unusual, perhaps a little outside the norm...you might even call it, the ODD-1.

And we plan to keep that off-beat attitude. We hope that brightly-colored friends, ODD-2 and ODD-3, will be along to join ODD-1 after not too long.

Build Updates

We have a lot of exciting progress to report since the last time I wrote. Hop over to our YouTube channel to check out a build update video and some in-depth functionality demos.

We debugged and fixed several problems with the circuit board including the power-up, line input and output, and noise on the control signal inputs.

We got several bids from contract manufacturers in the U.S. and around the world and selected Soldered, based in the E.U. They came highly recommended, and we think their experience will be a huge asset as we go into production.

We worked with Martyna Alexander to tweak the graphic design of the front and back panel. We are thrilled with the updates, including our new company and product logos.

We have first iterations of our custom firmware, enabling full functionality of the device and full USB connectivity to a host computer.

We have completed first versions of the software that include all audio, MIDI and system functionality we intend to support for the release. After many months of playing and testing we re-organized a few functions to expand both the number of concurrent grain “playheads”, and to support banks of patches intended for convenient switching and management in live performance.

What’s Next?

CLICK FOR MORE »

New SEOK Eurorack Modules - DRIPS, AT, M22, & ROTARIES

SEOK - DRIPS – Voltage Controlled Analog Filter [DEMO no talk]

video upload by SEOK synthesizers

via SEOK Eurorack Modules

DRIPS

A warm and bubbly 12 dB/oct analog Eurorack filter with dual voltage control of frequency. Low-pass, band-pass, and high-pass outputs in one compact 8 hp module.

With external signals, the filter stays soft, clean, and precise. Adding resonance gives a liquid acid tone (like a good filter coffee). When driven into self-oscillation, it produces sine waves perfect for deep bass, kicks, and percussive sounds.

An integrated VCA placed after the filter lets you shape both tone and dynamics in a single path – precise when clean, saturated and raw when pushed.

Raise the offset to move seamlessly from rhythmic sequences to heavy drones.

Background:
We wanted to build a versatile Eurorack VCF/VCA with a balanced function-to-HP ratio. For us, ergonomics are as important as function – it should feel intuitive and spacious around the core controls.

And since we’re from Sweden, we couldn’t resist adding a little warmth.

CLICK FOR MORE »

Olivella Modular Furia | Discrete transistor filter & VCA

video upload by Tom Churchill

"Olivella Modular's Furia is a 4-pole transistor ladder filter, based on the E-mu Modular 2100 LPF designed by Dave Rossum in the 1970s, paired with a discrete transistor VCA with tons of gain. There are no ICs anywhere in the audio path, so it has an authentically vintage sound, and it distorts in a really musical way. In this video, I give an overview of Furia’s signal path and controls and build a few patches to demonstrate how it sounds.

Chapters:
00:00 Intro & patch previews
01:42 Furia overview
07:41 Pinging the input
09:41 Overdriven acid
13:54 Furia as a low-pass gate
16:39 Dirty drum machine preamp
22:00 Audio-rate cutoff modulation"

"FURIA is a discrete 4-pole ladder filter and a transistor VCA with a variable response CV curve control. It isn't 'just' a filter, but an all-around vintage-sounding sculpting and performing tool.

The filter section is based on the venerable E-mu Modular 2100 LPF, but unlike it, there're no ICs in the audio path - even the output stage op-amps are transistor based, both in the VCF and VCA sections.

As its name suggests, FURIA has plenty of gain on tap: the INPUT LEVEL knob starts distorting around 9 o'clock and interacts with the resonance in interesting ways, while the VCA and its X10 input switch can transform the filtered sound into nasty acid basslines - no external distortion required.

You can use the filter and VCA independently or in series, with an AMP CV input that's normalled to the FREQ CV input to facilitate a LPG-like configuration.

The AMP IN allows you to mix a signal into the VCA after the filter - for example, a higher register FM'd or wavefolded sine wave with a bassier filtered sawtooth from the LPF stage.

Unlike most ladder filters, FURIA's LPF is fully DC-coupled, though internal offsets may produce slight clicks at the VCA stage.
To remedy that, the DIP switch on the back lets you selectively AC-couple the VCF and VCA inputs and outputs, reducing clicks and offsets for audio purposes. It also allows you to change the VCF -> VCA normalling for series, parallel or independent use."

Minimal electronic with glitched piano sound : Between the waves 2025-10-26 by atnr

video upload by atnr

"A piece created with norns shield and modular synthesizer — an ambient electronica work where glitch-processed piano tones emerge within waves of sustained electronic sound.

On the norns shield, the barcode script is used to record and play back synth pad performances from the ‪@SequentialLLC‬ Prophet-10. The connected ‪@KorgOfficial‬ NTS-3 adds reverb and occasional tremolo effects.

In the modular synthesizer, a piano performance is recorded into Morphagene, which is then modulated with CV signals from Quad Function to create glitch variations. The modular output is split into two paths: the original signal from Morphagene, and another processed through a Clouds clone. The original path is further enhanced with ‪@ChaseBlissAudio‬ MOOD MKII, applying micro-loop effects for additional glitch textures."

Morphor ECHON 6 BBD Resonator Synth Now Open for Pre-Orders

Morphor's ECHON 6 pre-orders are now open at Perfect Circuit

Press release follows:

Morphor marks upcoming availability of ECHON 6 as world’s first polysynth based around analogue BBD resonators by announcing opening of pre-orders

GHENT, BELGIUM: having twice turned heads and opened ears thanks to show-stealing showcases at SUPERBOOTH25, May 8-10, FEZ-Berlin, Germany and Machina Bristronica 2025, September 27-28, Bristol, UK, Morphor marks upcoming availability of its eagerly-awaited ECHON 6 — being billed as the world’s first polyphonic synthesizer based around BBD (Bucket-Brigade Delay) resonators, building upon the Belgium-based collective of artists, engineers, and musicians with a passion for creative sound experience and radical acoustic ideas’ illustrious Eurorack expertise in that area as its inaugural standalone (rack-mountable) desktop design — by announcing the opening of pre-orders as of October 23…

As an ANALOGUE POLYPHONIC MULTI-TIMBRAL BBD SYNTHESIZER — helpfully highlighted by the on point wording worked tastefully into its fitting front panel design’s execution, ECHON 6 brings the principals of modal synthesis into the analogue domain. Far from reimagining a digital concept with modern analogue circuitry, it readily redefines how resonance and excitation can interact. And as the world’s first polyphonic synthesizer based around BBD resonators, no less, each of its six voices features a discrete BBD RESONATOR that tracks the keyboard, producing organic overtones and complex harmonic depth. Duly allowing its users to excite those resonators in creative ways, ECHON 6 can generate anything from plucked and bowed strings over leads and basses to big pads and evolving soundscapes. Combining comprehensive multi-timbral capabilities, a 9 x 32 modulation matrix, a full analogue signal path, and a one-knob-per-function approach, ECHON 6 ultimately unites experimental sound design with classic polyphony. Indeed, its architecture invites exploration at every stage of that analogue signal path.

CLICK FOR MORE »

Erica Synths - Fusion System 1

Note: links to listings are affiliate links for which the site may be compensated.
video upload by NOISEBUG

https://www.noisebug.net/

Update: moved this one up for the added video.

"Erica Synths - Fusion System in excellent condition

She’s a real screamer! Available for purchase on our used reverb page. Interested in trading in your gear for store credit? Shoot us an email! #synth #eurorack #modularsynth"




via this Reverb listing

Additional NOISEBUG Listings

"Fusion System MK1 in excellent condition. This system has been fully tested. all modules function as expected and the modules all sound incredible!

Comes in an Erica Synths powered skiff with original PSU.

Erica Synths Fusion Drone System is here for those, who want to explore the dark territories of the sound, where only few have stepped in.

Vacuum tube based Erica Synths Fusion Series modules are the basis for this system, while Black Modulator and Black Envelope Generator add plenty of modulation and noise generation possibilities. It has 43 patchpoints for extensive experiments in sound design, all analogue signal and CV path to create the drones of massive power. Want a solid bassline with great 1V/oct tracking? Use CV/Gate sequencer or keyboard and you have it! Erica Synths Fusion Drone System brings distinct and powerful sound into eurorack.

Fusion Drone System includes:

Fusion VCO – Two double triodes in bistable latch connection act as suboscillators: -1 and -2 octaves with plenty of mixing opportunities for amazing sonic results. External audio signal can replace internal VCO.

Fusion Ringmodulator V2 – Germanium diodes enrich the sound by adding extra harmonic content meanwhile vacuum tube adds evilish overdrive to audio and carrier signals.

Fusion VCF V2 – Each side of the double triode drives signal between 2nd and 3rd stage of the filter, while germanium diodes are used to limit the output signal.

Black Modulator – a fully analogue modulation and noise source.
Black 8-Multi – an advanced replacement for stackable patch-cables – it is active buffered multiple with signal status LEDs.

Fusion VCA V2 – a Russian miniature pentode 1Ж24B with power consumption comparable to an LED.
Black EG – the ultimate control over envelopes in your modular system.

Fusion Delay/Flanger/Vintage Ensemble – a distinct multifunctional analogue effects module that combines BBD chip based effects with an adjustable tube overdrive in the delay output and a feedback path for extra thickness of the sound.

104HP One Row Skiff case"

CLICK FOR MORE »

A Modern Classic Eurorack LPG New & Improved in STEREO!! // Stereo State Gate Stereo Field from SSF

video upload by DivKid

"Here we have the new 'stereo field' version of the Steady State Gate from SSF (Steady State Fate). It's a revamped circuit design with added features and new stereo functions that builds on what I think is a bit of a modern classic, the Steady State Gate from 2022. It's a re imagining and expanded LPG or low pass gate that has on board wave shaping, versatile filtering options and stereo field (stereo image, creation, control and modulation thereof) controls. It's beautifully musical and dynamic, check out the patches below."

"The Steady State Gate Stereo Field (SSGSF) is a stereo low-pass gate module combining dynamic filtering, timbre shaping, and stereo field control to produce rich, evolving textures with spatial effects. Suitable for both stereo and mono sources, it offers extensive modulation possibilities for expressive sound design.

Newly designed signal path with updated Timbre and Qaos response and control.

True stereo design utilizing a curated mid-side signal chain that provides processing features for stereo, as well as mono input signals.

Stereo and mono signal processing including psychoacoustic panning and stereo field enhancement with voltage control and two 'FIELD" modes.

New CV/GATE LPG control input. Can be used simultaneously with EXCITE for more dynamic and rhythmic effects."

Check with dealers on the right for availability.

CLICK FOR MORE »

AD ENVELOPE + VCA WITH A BITE | ADDAC System - ADDAC816 Percussion VCA

video upload by DANIELE

"The ADDAC816 Percussion VCA by ADDAC System is a voltage controlled amplifier featuring an integrated AD envelope with a fast attack and adjustable decay, perfect for creating precise and dynamic percussive sounds!"

0:00 Intro
0:24 Envelope gain
1:08 Decay knob and time switch
2:05 Envelope input behavior
2:33 VCA input
2:46 Patch 1
4:02 Patch 2
5:05 Patch 3

"While deep in its soul there’s a standard VCA with exponential response that can be used as such, in its heart pulses an AD envelope with a sharp attack and a variable decay internally connected to the VCA control input. When it opens its mouth it can whisper in your ear but don’t let this soft demeanor fool you, if driven to the extreme it will show its teeth and gnarly bite and chew on your cochleas with all its might.

The AD envelope has a fixed short Attack, just enough to avoid the typical “click” that happens when using a Gate signal to control a VCA, while the envelope Decay can be controlled via its knob or voltage controlled using the CV input and attenuverter.

We named it Percussion VCA as most percussion intruments have sharp attacks with variable decays just as its AD Envelope however it can be used for any purpose where a VCA is needed including for CV signals due to it’s DC coupled signal path.

Furthermore it also allows to be driven from a simple Gate signal while controlling its decay. This way it’s easy to plug a noise source, vco or any audio and turn that source into a percussive element."

Check with dealers on the right for availability.

Multimode Tube Filter, Saturator & Beyond! // VAMP from Apollo View Modular

video upload by DivKid

"With Vamp Apollo View modular took the early Korg MS-20 and MS-10 filter designs, which favoured non-linear character over stability and control, they added more character with a tube input saturation stage and tube resonance feedback path, further output clipping stage options and then designed in modern stability and control. I joke in the video the filter is so rubbery it might as well be wearing a gimp mask. Vamp is also multimode with low pass, band pass and high pass modes with routable pre/post VCA and gain option, smart normalled CV options and prevision circuitry to turn it into a full single module tube voice, killer kick drum and more.

Vamp, manual, signal flow & more at // https://www.apolloviewmodular.com/mod..."

VAMP
8HP Multi-Mode LP/BP/HP Sallen-Key Filter with Tube Saturation & Distortion

VAMP is a multi-mode analogue filter that gives you low-pass, band-pass, and high-pass responses in a compact 8HP design. At its heart lies a classic Sallen-Key topology supercharged with real vacuum tube (12AU7) saturation and multiple stages of clipping, letting you move seamlessly from smooth, hi-fi filtering to snarling, overdriven character.

One half of the tube is used to saturate the input, while the other half provide MS-20-inspired resonance limiting (tube, not diodes). With FLOW placing the VCA pre-tube or post-filter, and FANGS selecting Off / Soft / Hard output clipping, VAMP ranges from subtle warmth to ferocious harmonic destruction.
FEATURES
Three filter modes: low-pass, band-pass, and high-pass
Classic Sallen-Key topology with tube saturation and clipping
12AU7 vacuum tube: one half for input drive, one half for resonance distortion
MS-20-style resonance limiting/clipping for aggressive tones
FLOW switch: Integrated VCA pre-tube or post-filter
FANGS: output clipping: off / soft clipping / hard clipping
1V/Oct cutoff tracking: use VAMP as a VCO in self-oscillation
Extensive CV control: GAIN, FREAK (cutoff), REZ (resonance) (all with attenuverters)
Self-oscillation for screaming tones
TECH SPECS
8HP
30mm Depth
40mm Max Tube Height from panel
Reverse polarity protected
+12V 230mA
-12V 70mA

Behringer Introduces UB-Xa MINI | Analog power in your hands

video upload by Behringer

"Meet the Behringer UB-Xa MINI, a compact analog synth built to inspire.

With 3 VCOs, a dual-slope VCF, a 16-step motion sequencer and a multi-mode ring modulator, it delivers that rich, evolving sound that makes ideas come alive.

Designed for producers, live performers and anyone who wants hands-on control, UB-Xa MINI turns every knob into an invitation to explore.

🎛 3 VCO | Dual VCF | Motion Sequencer | Ring Mod | Touch Keys | USB-C + MIDI"

Analog Polyphonic Synthesizer with 3 VCOs, Classic DUAL VCF, Ring Modulator, and 16-Step Motion Sequencer

Powerfully Compact, Incredibly Capable
The UB-Xa MINI is a compact analog polyphonic synthesizer that delivers big sound in a small package. With a fully analog signal path and three rich VCOs, it brings iconic ’80s textures into the modern age. Whether in the studio or on stage, its portability and punch make it an ideal choice for musicians who want authentic tone without compromise.

A Mini Synth with Maximum Impact
Sized for convenience but designed for performance, the UB-Xa MINI captures the essence of the UB-Xa in a streamlined format. It features a powerful analog engine, lush analog filters, and versatile modulation options, giving creators access to classic sounds and expressive controls – all in a more travel-ready design.

Total Control at Your Fingertips
With 27 touch-sensitive keys and an intuitive layout, sound shaping is immediate and fun. The switchable 12/24 dB analog filter offers powerful tone sculpting, while the LFO with three waveforms modulates pitch, cutoff, and pulse width with ease. Every knob and key are tuned for tactile, musical response.

Details on GS Music's New Pink E7 Desktop Synthesizer & Batman

See the video posted here.

Details via GS Music:

The First Synth with a Cause

GS Music leads with its synths in the fight for breast cancer prevention and early detection

After 11 years of dreaming, GS Music finally brings to life a project that speaks to the very heart of its team: supporting breast cancer awareness and early detection. The Argentinian brand — the first to manufacture polyphonic analog synthesizers in Latin America — launches a limited edition of the Pink E7, a synth that doesn’t just resonate sonically but vibrates with purpose.

“67% of our assembly team is made up of women. For us, it’s important that our actions align with the DNA of our team,”

says Elena Epuin, founder of GS Music and the main driving force behind this heartfelt campaign.

Breast cancer is a disease that can affect women at any moment in their lives. That emotional proximity to the cause is what led the team to finally bring an old idea to life — one that had been evolving for years.

A synth with soul (and heart)

“The idea of the pink synths has been in our heads for a long time,” Elena explains.

“For us, it’s vital to keep our synths connected to the human side of things. The E7 doesn’t just have a great sonic soul — it has a human soul too. I believe that’s why our clients stay in touch long after buying their synths.”

The result is a limited run of four Pink E7 units, in a soft baby pink tone with transparent iridescent knobs that perfectly blend tender visual design with raw sonic power. A true analog beast — seven voices of polyphony, multitimbral, with a fully analog signal path — now with a cause beyond the music.

All proceeds from the sale of these four special units will be donated in full to a leading oncological institution in Buenos Aires, reinforcing a campaign that goes far beyond sound.

A Batman, an idea, and a city

As a creative twist, Elena had an unexpected idea: she invited Buenos Aires’ own Batman influencer, with over 60,000 followers on Instagram, to join the campaign.

The result was an iconic and moving encounter that brought together synths, social awareness, and a local superhero who represents strength, visibility, and commitment to real-world causes.

And yes, here are the photos from that unforgettable moment — even Batman showed up for this.

https://www.gsmusic.com/...

CLICK FOR MORE »

Creative Eurorack Distortion & How To Use It // HEAD BANGER from Setonix Synth & Robots Are Red

video upload by DivKid

"Distortion has been an essential tool for my music making for most of my life, whether that was playing guitar, working with synths in amps, re amping synths and production stems through pedal FX or smashing mixers, tape machines and other gear I've always found it fascinating and with the options to CV control distortion in modular it's even better!

Head Banger from Setonix Synth & Robots Are Red takes the Swedish Death Metal sound of the Boss Heavy Metal pedal, heavily re vamps it for a wide range of input sources, adds CV control and a creative feedback path and presents itself in Eurorack form. While the name and styling lean on the metal heritage it's been interesting to find a subtler warmth and crunch, synths in tube amp like tones and blown out noisy cassette style grunge for more ambient music.

There's a 5% off code for sales of Head Banger at https://www.setonixsynth.com/ with code HEADBANGER5. If you're a Patreon supporter there's an exclusive 15% off code for you at / divkid"

CLICK FOR MORE »

Hughes & Kettner Tube Rotosphere Plugin

video upload by Nembrini Audio

Press release follows:

"Nembrini Audio Launches The Hughes & Kettner Tube Rotosphere Plugin

Classic Rotary Sounds With Rich Tube Warmth And Easy Rotor Speed Control

3rd October 2025: Nembrini Audio is pleased to launch the Hughes & Kettner Tube Rotosphere plugin, an authentic digital emulation of the acclaimed Hughes & Kettner Tube Rotosphere MKII Rotary Speaker* simulator. Listen to it here and see it here.

In the 1960’s the Leslie Speaker System*, originally developed in the 1930’s for the Hammond Organ, began to be used for guitars by The Beatles, Eric Clapton, David Gilmour and more. In the 1990’s Hughes & Kettner, a highly respected manufacturer of instrument amplifiers, cabinets and effect boxes, created the Tube Rotosphere pedal, an extremely accurate, analog reproduction of the Leslie Speaker System.

More than thirty years later, Nembrini ‘s new plugin breathes fresh life into this cool sound with the introduction of a realistic digital simulation of the much admired Hughes & Kettner Tube Rotosphere. Celebrated for its rich tube-driven character and highly musical rotary modulation, the original hardware was used keyboardists and guitarists seeking the iconic swirling depth of a classic rotary cabinet, with the warmth of real tube saturation. The new Hughes & Kettner Tube Rotosphere plugin faithfully captures every nuance of its analog counterpart, offering everything from subtle to dramatic Doppler-infused motion, with can be seamlessly integrated into any rig.

Nembrini’s advanced modelling technology captures all of the lush swirl, warm tube saturation and authentic rotary motion of the original pedal. The key features of the new plugin include true to life emulation of the analog circuitry and tube preamp behaviour, independent rotor speed simulation with separate LF and HF controls allowing precise adjustment and a breaker switch for realistic ramp-up/down and rotor stop effect. There is also tube saturation modelling with visual feedback, rotor balance control for fine tuning the blend and a stereo signal path for wide, immersive rotary modulation.

The Hughes & Kettner Rotosphere plugin desktop version is available at the introductory price of $29.99 (normally $99) until the October 31st 2025.

To find out more and download the Hughes & Kettner Rotosphere plugin please go to www.nembriniaudio.com/products/hughes-kettner-tube-rotosphere"

GAMECHANGER Launches the MOTOR Pedal

You can find demos in previous posts here.

Check with dealers on the right on availability and price.

Press release follows:

"Gamechanger Audio Officially Releases the MOTOR Pedal

Electromechanical sound. A gas pedal for your guitar. The ultimate analog noise-machine.

Riga, Latvia – September 29, 2025

After years of development and anticipation, Gamechanger Audio is proud to announce that the MOTOR Pedal is finally available to the public. First teased as a wild experiment back in 2019 and reintroduced earlier this spring as a pre-order, the MOTOR Pedal is now shipping worldwide—bringing a completely new category in sound and performance machines to guitarists, producers, and sonic explorers everywhere.

At its core, the MOTOR Pedal is built on two groundbreaking technical achievements:
A fully controllable musical motor oscillator that transforms brushless DC motors into living, breathing sound sources.
An proprietary monophonic pitch-tracking engine that follows guitars and virtually any instrument with surgical accuracy.
These breakthroughs were forged over years of experimentation. From 2019 to 2022, Gamechanger Audio developed and released the MOTOR Synth MKI and MKII—the world’s first polyphonic synthesizers to use electric motors as vari-speed oscillators. More recently, the company perfected pitch tracking with its acclaimed AUTO Series pedals, released late 2024 The MOTOR Pedal builds directly on these innovations, fusing them into a compact stompbox—creating a powerful, unpredictable, and endlessly fun performance tool.

And in true Gamechanger style, it’s not just about the sound. The MOTOR Pedal introduces a completely new way to control it: a real acceleration foot pedal. This gas-pedal-style controller turns dynamics, pitch bends, and rhythmic sweeps into something you literally drive, delivering an adrenaline-fueled approach to expression that no other stompbox offers.

“Back in 2019, the original MOTOR Pedal was just a spark that set this whole journey in motion - what if we could play MOTORS as Oscillators!?” says Gamechanger Audio founder Ilya Krumins. “Since then, through the MOTOR Synth MKI and MKII and the AUTO Series, we’ve gone deeper and deeper into the world of electromechanical sound. At this point, we feel like we know pretty much everything there is to know about making music with motors and the MOTOR Pedal is the culmination of that knowledge, and the most fun, immediate and accessible way to experience it.”

Key Features:
● Real electromagnetic motor oscillator driven by precision pitch tracking
● Gas-pedal controller with five modes - for dynamic, physical expression
● Hybrid electromechanical + digital signal path for unique textures - five MOTOR engines - each with unique sound
● Compact form factor built for pedalboards, studios, and live rigs
● Replaceable motor block for extended lifetime and serviceability
● Powered by Gamechanger Audio’s MOTOR Synth (MKI & MKII) and AUTO Series technology

The MOTOR Pedal is now shipping worldwide from www.gamechangeraudio.com and with selected dealers world-wide.
The MOTOR Pedal is priced at 399 USD and 399 EUR (incl. VAT) respectively.
For more details, demos, and ordering information, visit www.gamechangeraudio.com."

Jomox Resonator Neuronium SN 56 w/ Original Box

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

via this Reverb listing

"I got this unique synthesizer new, directly from Jürgen Michaelis (Jomox) in 2019 - Serial No. 58. I‘ve only used it a few times, because I haven’t had the time to dive fully into its features.

I still think it has a lot of potential:

- Fully analog signal path

- 6 neurons, which are like voices, combining an oscillator, a resonant filter, envelopes and a special mini-sequencer (see below)

- Each neuron has its own output and also the stereo mix, and can be triggered separately (via round robin notes, or different MIDI channels) or in unison

- Neurons can feedback into each other and themselves, FM each other and “genetically modify“ each other (see below)

- At the same time, neurons can play notes, via MIDI, with the relationships between them still in place - so as if the six voices of a polysynth were all connected to each other

- Each neuron has a mini byte sequencer, which can be used to sequence the filter cutoff, or the steps can be interpreted as a sample, or waveform of the oscillator!

- The sequences of each neuron can also interact with each other, combining in different defined ways to create new, evolved sequences as they run

- There are two external audio inputs, which can be used as the exciter of two of the neurons instead of the oscillator, so you can process external stereo sound as part of the craziness

- You can play it as a 6-voice polysynth if you want!

Perfect condition, comes with original box and individual power supplies for 100-120V and 220-240V."

CLICK FOR MORE »

ADDAC Perc VCA and Friends Jam

video upload by Molten Music Technology

"Really liking the Perc VCA for the simplicity of its built in decay envelope and ability to grab a bassline with the minimum of fuss. Here's a quick demo and I hope to do a full review soon."

"While deep in its soul there’s a standard VCA with exponential response that can be used as such, in its heart pulses an AD envelope with a sharp attack and a variable decay internally connected to the VCA control input. When it opens its mouth it can whisper in your ear but don’t let this soft demeanor fool you, if driven to the extreme it will show its teeth and gnarly bite and chew on your cochleas with all its might.

The AD envelope has a fixed short Attack, just enough to avoid the typical “click” that happens when using a Gate signal to control a VCA, while the envelope Decay can be controlled via its knob or voltage controlled using the CV input and attenuverter.

We named it Percussion VCA as most percussion intruments have sharp attacks with variable decays just as its AD Envelope however it can be used for any purpose where a VCA is needed including for CV signals due to it’s DC coupled signal path.

Furthermore it also allows to be driven from a simple Gate signal while controlling its decay. This way it’s easy to plug a noise source, vco or any audio and turn that source into a percussive element."

Antonus 2600 DIY - Test Drive

video upload by Tumeni Knobs

"This is my Antonus 2600 - I just completed building it from the synthCube.com full DIY kit. It is a huge project! Working on it in my free time, it took six months for me to complete. But I'm sure a full-time builder could do it in a couple of weeks. I actually love that it took me this long. :-)

Anyway, since I first powered it up I have been testing, calibrating and starting to understand how it works, and yes, it deserves it's reputation as an awesome sounding and very flexible synthesizer.

This video is just me noodling on it using the Arturia KeyStep Pro with a sound/patch I really like. This is actually just one of its three oscillators, but I have the saw and square waves patched in. The other two oscillators are in LFO mode. The oscillator is using the ADSR envelope and the filter is using the AR envelope plus an LFO to modulate it - makes some interesting accents.

Effects are courtesy of the Fractal Audio VP4, which is an incredible pedal.

I thought adding some drums would give this more of a musical context, so I force-fit some patterns from EZ Drummer.

The opening groove is definitely reminiscent of Bluetech's Laika, from the Spacehop Chronicles album. It's intentional. :-) I really like his stuff! Go buy some at Bandcamp.

This signal path for this recording goes like this: 2600 into VP4 into iRig into iPhone. I then applied a little EQ in Studio One, just to trim out the extreme highs and lows - I did not use any compression on this.

Can't wait to make some "proper" music with this amazing synth.

Cheers!"

Explore the modular’s re-patching power

video upload by Monotrail Tech Talk

"With a modular you have full control over your signal path. This means you can combine modules and functions like oscillators, VCAs, and modulation sources in different ways, again and again. In this video I show how the ingredients for a ‘classic’ 2 oscillator voice can be expanded, and used to create a variety of interesting ‘simple’ dual voice setups."

Synthesizer-Wettbewerb, Beitrag "Ambient Jam"

video upload by KEYBOARDS

"Ambient Jam with Polyend/Dreadbox Medusa and a few iPad apps.

A total of only 6 tracks, a simple chord progression, but with Probability/Random Notes from the Medusa and a few effects. It's all very chilled out and only using my "desktop setup" in my office. Since I usually only make music with hardware, this is a nice change and a challenge for me.

To visualize the whole thing more appealingly, I used a freely available NASA video in the background, which can be used for non-commercial purposes. The video was created with Adobe Premiere Pro. Everything else in the video, and of course the music, is mine.

I use the Medusa with Probability for melodic to whiny synth sounds, mostly with the wavetable oscillators. During recording, I play around with the filters and oscillators. The Medusa sequencer is synced to AUM by Kymatica.

I also recorded the bass beforehand using the Medusa and its analog oscillators. This is played back via the Koala sampler.

The track begins with a synth pad from Synthscraper/Igor Vasiliev

and two tracks of 'synthetic' water (one via the Koala Sampler, the other via the Spacecraft granular sampler). I tinkered around until I managed to create something reminiscent of flowing water from the noise and other sounds.

Klevgrand's Hillman, a phaser-equipped organ synth, is used to give the track a bit of a retro flair.

To increase the dynamics, Klevgrand's REAMP, a tube amp simulation, is later used.

Reverb from Eventide (BlackHole) was used except on the bass.

The mastering was done with GrandFinale 2, which was already in the signal path during recording."