Macumbista Butterfly Benjolin + Dual AM/RM | Low-gain Electronics

video upload by LowgainElectronics

"Updated my v4/5 Butterfly Benjolin to include one of my Dual AM/RM modules. On the left Benjolin i wired it as per Macumbista’s new ring mod block diagram. With the dual AM/RM circuit you can have the modulator do either ring modulation or TZ amplitude modulation. So that makes for some fun. On the right side I wanted to keep the second AM/RM isolated so you can plug in anything you want to it. Far right side has X/Y inputs. Middle has output and mode switch (AM/RM) and i swapped the external input to the filter to a switching jack and wired a banana back to the normal so you can patch anything banana format into it as well. Internally the external banana jack has a trim pot to adjust the gain amount."

New Eurorack Modules Coming From Doepfer

Doepfer will be showcasing the above new modules at SUPERBOOTH25. Details on each follow.
Check with dealers on the right for upcoming availability.

Module A-119-2 is kind of a dual version of module A-119 without envelope follower. Instead two amplifiers are available and the module width is 4 HP only.

The module contains two amplifiers with separately adjustable amplification levels. Each channel is equipped with an overload display. The module can be used also for stereo signals, e.g. the stereo output of a smartphone.

Controls and displays:

Level 1/2: manual control of the amplification in the range 0 - about 45.

Overload 1/2: overload LED, begins to light up for output levels beyond about 10Vpp (+/-5V)

In 1: audio input 1 (monophonic or stereophonic, see technical details)

In 2: audio input 2 (monophonic)

Out 1/2: audio output (monophonic)

Technical details:

for higher amplifications the two amplifiers can be daisy-chained

normalling options: the signal applied to socket In 1 can be normalled to socket In 2 in different ways by means of a jumper on the pc board:

socket In 1 is connected via a mono patch cable (standard patch cable) to a monophonic signal and this signal is normalled to socket In 2 (i.e. the same input signal for both sub-units): jumper on pin header JP2 in upper position

socket In 1 is connected via a 3.5 mm stereo TRS cable to a stereophonic signal and the second channel of the stereo signal is normalled to socket In 2: jumper on pin header JP2 in lower position

no normalling: jumper is removed from pin header JP2

all inputs and outputs are DC coupled. Thus the module can be used also for the amplifications of control voltages.

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ARP 2601 v2.0 with 3620 Keyboard – Iconic Orange-on-Black Semi-Modular Synth SN 0707 w/ Mods

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

via this Reverb listing

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Vintage Moog 921A driver, 3x 921B VCOs with PSU

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

via this VEMIA listing

Click the auction link on top when you get there for additional listings.

VEMIA is Peter Forrest's auction house. He is the author of The A-Z of Analogue Synthesizer Books.

"Four classic mid-seventies modules: one 921A Oscillator Driver, and three 921B Oscillators. Complete with an International Power switchable power supply (now more commonly badged Power One) and a wiring harness / loom wired for five modules - the four 921s here, and a fifth module - until now, the 904 in the previous lot. ***This will need encasing***, and of course the modules will need to go in a simple case or an existing cabinet. In very nice cosmetic condition, and working well. Bought by the current owner in 2003, and since lightly used in a non-smoking home studio. The power supply has a standard IEC mains socket and fused switch with power light. The fuse will need to be changed if the voltage is switched from USA, where it is currently located."

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Analogue Solutions TC5000 Synthesizer: "Pulse Diver" Sequence No. 416

video upload by Analogue Solutions

"Here’s a new single sequence, "Pulse Diver" from the Analogue Solutions #TC5000 Patch Pin Matrix Synthesizer—recorded with no external instrumentation, FX, or processing. It demonstrates how you could build a track from a single analogue sequence, if desired.

An #arp2600 kick was used live and clocked from the TC5000. Every other sound in this video is TC5000 live."

"With the TC5000’s vast sonic range, no single video can fully showcase its capabilities. We’ll share more sequences to highlight different aspects of its sound design potential.

About the Patch:

The TC5000's pin matrix provides extensive routing options for highly intricate and dynamic patches. A single pin can introduce subtle nuances or completely transform the sound.

In fact, the complexity of just one patch could warrant an entire essay!

In this sequence:

You'll need speakers with bass 🔊

This is a faster tempo sequence with percussive elements. The envelopes are very tight, giving the synth a characteristic sound.

-The MIDI to CV Converter module 5088 was utilised for connectivity to a Keystep keyboard. The Note Loop Sequencer on this module was used for the basic pattern of the repeating bass sound.

-A simple sequence from the 5054 Sequencer modulates pitch for Oscillator 2 (VCO Module 5004) and is supplemented by waveforms from the other 2 Oscillator modules.

-Oscillator 3 features a separate sequence from the 5054. Both are manually faded in during the performance.

-Dual filters—the VCF-Multi (5047, SEM-style) and VCF-LP-CEM (5012, low-pass)—are actively modulated by the sequencer’s preset voltages.

-White noise is introduced via the Dual Noise / Random module 5032.

-Modulation variations are done in real-time via the vast pin matrix on the TC5000. One pin can dramatically alter a sequence.

-An ARP 2600 kick sound can be heard running alongside the TC5000. This was clocked via the TC's Convenience jack. The Convenience jack is not wired to the module's circuits. It is an independent jack input that allows you to take signals in or out of the matrix panel.

More sequences will follow, exploring different possibilities with the TC5000."

TC5000 playlist:

Erica Synths EDU DIY Labor Scope

"This DIY.EDU Labor add-on, featuring the oscilloscope, the voltmeter, the spectrometer and the tuner, turns the Labor into self-contained electronics development and experimentation station.

Features
The 3-channel oscilloscope. Two channel inputs are available on female connector, the third channel is hard wired to the audio output of the Labor.
Lissajous curves visualizer.
The voltmeter, 10V range, 0.1V accuracy.
The spectrometer, with configurable representation.
The chromatic tuner.
NB! The DIY.EDU Labor Scope is intended for use exclusively with the Labor platform, and other applications and modifications may lead to permanent damage of the instrument."

ANALOGyX2 Synthesizer from Waverley-Instruments

video upload by James Dyson

"ANALOGyX2 Synthersizer from Waverley-Instruments

An AU and VST 3 Duel VA Synthesizer for macOS
Windows version is planned..
Check it out here
https://www.waverley-instruments.com/..."




"ANALOGyX2 is a virtual analog synthesiser with a variable shape oscillator, including sub and noise generators with independent envelopes, a variable mode ladder filter with dedicated envelope and LFO, a pre-wired mod matrix including PWM, vibrato, tremolo and auto-pan, and last but not least, a selection of built-in effects comprising distortion, chorus, delay, grain pitch shifter and reverb.

Times two. Or as we like to say here at Waverley Instruments - 'X2'.

ANALOGyX2 isn’t just a dual oscillator, or even a “dual voice” affair, it’s two totally independent instruments. Unlike most 'A+B' or 'layered' designs, the only parameters common to both instruments in ANALOGyX2 are the master volume control and pitch bend range. Everything else, including the effects, are totally independent.

On the one hand, this means the ANALOGyX2 sound designer has twice as much to think about. On the other hand, we think this also means there’s twice as much fun to be had, and exponentially more sonic possibilities!

How do you pronounce ANALOGyX2?

Some people pronounce it “anna-loggy-ex-two”. Other people pronounce it 'analogy times two'. To be honest, we don’t mind how you pronounce it. We’re just delighted that you’re talking about ANALOGyX2!"

Metunar Live Set - Sonic Alteration - Chopper

video upload by Metunar

"Second track of my experimental soundscape live set from 2025.
This „music“ is free improvised.

Project = Sonic Alteration
Song = Chopper
Stile = Experimental Soundscape
Setup = Erica Synths Syntrx and iPad with Borderlands Granular Software are processed through the Roland VG-8 to get some wired sounds.
The VG-8 is modified with line inputs."

http://www.metunar.ch

Metunar Live Set - Sonic Alteration - Unstable

video upload by Metunar

"First track of my experimental soundscape live set from 2025.
This 'music' is free improvised.

Project = Sonic Alteration
Song = Unstable
Stile = Experimental Soundscape
Setup = Erica Synths Syntrx and iPad with Borderlands Granular Software are processed through the Roland VG-8 to get some wired sounds.
The VG-8 is modified with line inputs."

http://www.metunar.ch

Tiptop Audio Polyphonic Modular System - In The Studio

video upload by Tiptop Audio

"To celebrate the release of the first set of Polyphonic modules, the Vortex6, Octogain, Octostages, Octopus, Octovert, and the Polytip Patch Cables—we invited Simone Miceli to join Piero Fragola in his home studio in Florence, Italy, to compose a song. This piece demonstrates how a violin, vocals, and these new Eurorack modules work together to create music.

Except for the vocals and violin, which were recorded separately, all synth voices were captured in a single take from the system in the video. The leading sound in the track is the Vortex6, with all six voices gliding seamlessly between notes.

In a polyphonic synthesizer, we know that the key building blocks like oscillators, filters, and LFOs are hard-wired under the hood of the synth. In modular poly, we open up all the possibilities that modular synthesis provides--IN POLY!
Welcome to the future."

Check with dealers on the right on availability.

Metasonix TM-3 Dual VCO Calibrated by Schneiders Buero, Berlin

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

via this listing

"Dual Voltage-Controlled Oscillator

Dual Thyratron-based voltage controlled oscillator. Both oscillators are wired in parallel, but can be offset, and oscillator 2 can be soft-synced to track oscillator 1. Oscillators can be tuned independently. There is also a suboctave circuit with separate offset and level.

Useful for providing FM effects and unusual distortion profiles, or driving other Metasonix TM series pedals.

As with other Metasonix TM series pedals, settings can be controlled manually or via control voltage inputs.

Calibrated by Schneiders Buero, Berlin.

Inc PSU.

Post to UK or collection from Chelmsford, Essex"

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NAMM 2025: MIDI Association's Network MIDI 2.0 Unveiled

video upload by sonicstate

"At NAMM 2025, the MIDI Association revealed significant updates regarding the implementation of *Network MIDI 2.0*. We caught up with Pete, who shared insights into how the new protocol has advanced from its predecessor, featuring no cable length restrictions and compatibility over both Wi-Fi and long wired connections.

A standout demonstration involved the Windows implementation of Network MIDI 2.0. Pete illustrated its application using Music Kraken on an iPad, seamlessly controlling a Windows PC running Multitrack Studio via Network MIDI 2.0. The setup, using a BomeBox and KissBox to manage older MIDI 1.0 devices, highlighted the simplicity and efficiency the new standard offers, making it easier for developers to integrate without extensive new requirements.

Noteworthy too, was a discussion about MIDI 2.0's Piano Profile, aiming for consistent performance standards. Pete reassured us that the implementation efforts are gaining pace, promising further integration within Windows soon."

Electronic Music Laboratories Electrocomp EML-101 FULLY SERVICED

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

via this listing

"This EML 101 is fully serviced by in-house technicians, fully functional and in great condition. It sounds awesome.

The ElectroComp 101 is the successor to the rare ElectroComp 100 from Electronic Music Laboratories (EML), a small synthesizer company based out of Connecticut in the USA. Like the ARP 2600, the 101 is a patchable (1/4'' patch cords) semi-modular synth with a pre-wired voice path that can be over-ridden via patching. But unlike the ARP (or MiniMoog for that matter), the 101 has as many as four oscillators (two of which can go sub-sonic, for use as LFOs). The 101 is also Duophonic so you can play up to two notes at once. Another major distinction was that unlike Moog and ARP, who used transistors that would tend to drift out of tune under various operating temperatures, EML used op amps which proved to be far more stable and reliable.

Other onboard features include a voltage controlled 12 dB/oct multi-mode filter with resonance, two envelope generators, ring/amplitude modulator, noise, and sample-and-hold (they call this the "Sampler"). In addition, the 101 makes no distinction between control voltage and audio paths allowing just about any source to be patched to any control or audio input in any order. The 101 could easily be closed, secured and carried inside its wood casing.

This synthesizer is fantastic. It's warm, punchy, powerful and has lot of bite not to mention a sound that sets it apart from its contemporaries and, for that matter, any other synth."

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ARP - Model 2600 Synthesizer SN 0962

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

via this listing

"ARP - Model 2600 Synthesizer - Early 70s USA Synthesizer w/ 3620 Keyboard - x0962 - VINTAGE

The ARP 2600, introduced in the early 1970s, is a semi-modular analog synthesizer that became a cornerstone in the world of electronic music. Designed by Alan R. Pearlman and his team at ARP Instruments, this synthesizer was renowned for its versatility and rich sound. Unlike fully modular systems, the ARP 2600 came pre-wired, allowing musicians to play it straight out of the box while still offering the flexibility to reconfigure its signal path using patch cables. This made it accessible to both beginners and seasoned synthesists. Its robust build and portability also contributed to its popularity, making it a favorite for live performances and studio work alike.

One of the standout features of the ARP 2600 is its built-in spring reverb, which adds a distinctive depth and character to its sound. The synthesizer includes three voltage-controlled oscillators (VCOs), a voltage-controlled filter (VCF), and a voltage-controlled amplifier (VCA), providing a wide range of sonic possibilities. The ARP 2600’s ability to produce everything from deep basses to soaring leads and complex sound effects made it a go-to instrument for many iconic artists and sound designers. Its influence can be heard in numerous classic tracks and film scores, cementing its legacy as one of the most important synthesizers in music history."

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PATTERN GENERATOR PG303 by DATAPRODUCTS of NEW ENGLAND

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

via this listing

"Data Products of New England PG303 Teletype Pattern Generator

8 ch pattern generator with variable character sequence length

If you think of some of the earliest electronic rhythms ever made, you can’t avoid mentioning morse code. The Data Products PG303 is designed to send these patterns for telephone/radio testing, and is one of the strangest rhythm machines I know. It is probably half broken and gave me a nasty shock or two as I wired the power wrong, but it is always inspiring. On the album, this drives most of the rhythm, and in the library you can hear it also at higher Baud rates oscillating.

- HAINBACH ...from the "Landfill Totem" collection

does it music?? yes!

Not for the faint of heart, the PG303 has an ability to create the strangest gate sequence and fuse morse code and musical logic... ping filters or make a strange clock source!! This unit works on pure intuition!! no operation manual, just turn it on and make the slowest of trigs to audio frequency screams and spastic pulses!"

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Atov : lx euclid

Playlist (starting with supporting member Audiorial - click CC on the bottom of the player for subtitles):

1. Atov : lx euclid - A truly fun, easy and powerful euclidean sequenceur. - Audiorial
2. Euclidean rhythms made easy | AtoVproject lx-euclid - Tom Churchill
3. LX-Euclid play the Tiptop & Buchla rig - Stazma

"lx-euclid by AtoVproject & Lucas Bonvin

The AtoVproject lx-euclid is a 4-channel trigger sequencer with a standout feature: two touch-sensitive rings that redefine hands-on control. These rings, paired with full colour circular display, offer an unparalleled, intuitive interface designed for fast, real-time performance. The touch rings make it incredibly easy to interact with your sequences, allowing you to apply mutes, fills, and resets on the fly. This immediate tactile response puts creative control directly at your fingertips, making it perfect for both live improvisation and studio work.

In addition to its touch-sensitive rings, the lx-euclid boasts 4 assignable CV inputs, probability settings, and 8 save slots, offering endless possibilities for pattern creation and variation. The module also introduces new twists on traditional Euclidean rhythms, with Exponential, Inverse Exponential, and Mirrored Exponential algorithms for even more flexibility and evolving beats. Whether you're looking to unlock new creative possibilities or elevate your live set, the lx-euclid’s touch rings bring a whole new level of expression to your modular rig.

Stay weird and wired,

Lucas, Arthur & Chris"

New Barton Musical Circuits BMC118 Graphic Envelope

Demo video upload by boogdish

"New DIY Synth module. A graphic envelope generator. PCB/Panel/Microcontrollers are available on my site and a PDF with schematics/parts list etc https://www.bartonmusicalcircuits.com..."

"An envelope generator using slide pots like old graphic equalizers. Choose points in the envelope to loop during sustained portions. Use it as an LFO or as a normal step sequencer. A fun, tactile way of controlling modules. Compatible with 12V or 15V systems. Jacks are wired offboard, but all toggles and pots are mounted to the PCB. This design requires a slide pot from the Bourns PTL30 series, check for availibity before ordering."

Trogotronic 647E BARBARITUBE

video upload by trogotronic

Massive flashing lights warning for anyone sensitive to them.

"Model 647E Electro-Acoustic Analog Tube Synth Short Demonstration 1"

"BarbariTube 647E—our first Electro-Acoustic circuit in a TubeSynth—is HIGH-VOLTAGE ANALOG pure, uncut & triple-distilled. Which is to say it’s a TubeSynth able to play the actual SPACE you’re in. We took a high-voltage twin-triode vacuum tube wired for maximum gain, cut out all the expensive patch-cord CV/OPTO bits, ditched the pricey button logic hardware & shoved the business-end of our first ever Electro-Acoustic Synth Circuit smack in-the-middle.

How does it work? You plug it in. You fuck around. You find out.

You do so LOUDLY if you know what’s bad for the neighbors—& good—for the Electro-Acoustic circuitry.

Barbaritube’s authentic organic Tube-Analog sounds are alive, at your fingertips—NOW—& critically—HERE.

Making music in the “here & now” is refreshing: NO endless nested menus or deep-dish manuals to memorize just to get started. Hands down Barbaritube the fastest way to get kicked out of any respectable band, synth meet or swap meet.

Tube-Analog Barbaritube runs at nearly 200 volts with virtually limitless Analog resolution. When 247E’s signals are reduced to a blazing-hot range of 0 to +/-18v the transients get SHARPER & PURER—not blurrier & more messy like the legions of digi-chipped knob-gobbers. That’s what gives its voice that incomparable impact.

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Roland SH-1000 37-Key Synthesizer w/ Case

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

via this listing

"Roland SH-1000 analog synthesizer from the early/mid 70's! It is the cleanest example I've ever seen with barely a mark on it. Of course if you look close enough, there's signs of it being 50 years old but everything works great. All the organ flip switches work and are original/intact. The synth has recently been recapped and cleaned out by a tech here in Montreal to ensure perfect function for years to come. The only thing is the power switch lost function in part of the switch so it has been wired backwards to keep originality and function. Comes with the original hard case (missing one latch) which fits the synthesizer perfectly."

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TouellSkouarn : Distresañ // 3 Bands Stereo Cut/Boost EQ

video upload by TouellSkouarn

"3 Bands Stereo Cut/Boost EQ with cv inputs

Erica Synth Pico Drum loop into TouellSkouarn Sonveskañ and Distresañ."

"3 Bands Stereo Cut/Boost EQ
16HP / Aluminium panel / Black
3 Bands Stereo Cut/Boost EQ
Hi (± 14dB @ 15kHz)
Mid (± 8dB @ 1kHz)
Lo (± 10dB @ 30Hz)

Jacks : Inputs, Outputs, HI CV Inputs, Lo CV inputs
Hand-wired, Boutique quality, Made in Brittany, France (Plougastel-Daoulas, Landerneau).
Not that Stupid Breton name"