4th of July/26 Metasonix & Zerosum Inertia process the National Anthem

video upload by Cfpp0

"Happy Independence Day! It’s the 4th of July in the 250th year of the country that birthed Metasonix and Zerosum Inertia! And this year, the Star Bangled Banner is being whistled.

The audio is split three ways:
—running through the left side of the Zerosum Inertia 5654 into the TVM23 VCA into the Metasonix R-54 MKII into the TVM23 feedback section into the Zerosum Inertia Horripilation.
—running through the Metasonix R-53 into the Zerosum Inertia ZI61, with another copy of the original audio, amplified by the right side of the 5654.
—running through the right side of the 5654 into another R-54 MKII into the Zerosum Inertia Voltage Controlled Annihilation into the Metasonix R-51.

Some reverb was blended on the CXM 1978."

PAIA 9710 ADSR MIXER and PSU in METASONIX DRAG

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

via this Reverb listing

"This is a homebrew from kit Paia 9710 mixer with noise source and envelope generator. It is encased in a standalone yellow box in the spirit of early Metasonix pedals.. The case also has the PAIA power supply board to power the envlope generator board.

[manufacturers description]

The PAiA 9710 is a versatile module that combines three VCAs, a white noise source, and a full-function ADSR envelope generator. It allows for mixing signals before processing with the VCA, making it a compact solution for various sound design needs.

The PAiA 9710 is a multifunctional module designed for sound synthesis, combining several key features that enhance its versatility in music production.

Key FeaturesFeatureDescription

VCAsIncludes three Voltage Controlled Amplifiers (VCAs) for dynamic sound manipulation.

White Noise SourceProvides a built-in white noise generator for additional sound textures.

ADSR Envelope GeneratorFull-function ADSR (Attack, Decay, Sustain, Release) with adjustable parameters for shaping sound.

Mixing CapabilityAllows mixing of multiple signals before processing through the VCA, streamlining setup.ADSR Specifications

Attack Time: Adjustable from 500 microseconds to 5 seconds.
Decay Time: Ranges from 2 milliseconds to 7 seconds.
Sustain Level: Adjustable from 0 to 10 volts.
Release Time: Adjustable from 2 milliseconds to 7 seconds.
Trigger and Gate Inputs: Separate inputs for re-triggering the envelope.
Cycle Switch: Enables self-triggering for Low Frequency Oscillator (LFO) functionality.


The PAiA 9710 is ideal for musicians and sound designers looking for a compact and efficient solution for creating complex sounds and effects. Its combination of VCAs, noise generation, and a comprehensive ADSR envelope makes it a valuable tool in any modular synthesizer setup.

The envelop can self cycling (always on) or activated by trigger or gate voltage pulses."

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Macbeth Elements EL2 Analog Synth By Ken Macbeth SN 015

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

via this Reverb listing

"Up for sale is a super rare Macbeth Elements EL2 analog synth, hand-built by Ken MacBeth back in 2019 in extremely limited run of only 30 units, as said by himself - the best ever analog synth he ever built in his life… Described by him as “Elements on steroids, circuit wise”. Please do not mislead this with a regular silvers Elements - EL2 is one of a kind the way different unit. It features a striking black aluminium chassis, gold plated touch up keyboard and a very deep vintage style circuitry using through-hole components and 70’s vintage new old stock semiconductors and metal ICs. Three highly versatile discrete voltage controlled oscillators with individual audio outputs and advanced sync capabilities, classic architecture with subtractive signal path featuring unconventional filter slopes, a built-in spring reverb and a tape echo simulator. All this mixed up with a wide-ranging modulators and large tactile potentiometers for deep sound sculpting. Also, Ken decided to completely remove MIDI support making the priority to CV: he noted that most musicians use the instrument with Control Voltage and modular setups anyway. Removing MIDI parts freed up physical space and optimised the pure analog circuitry. VCO1 and VCO2 now get their own knobs instead of sharing just one. New spring reverberation circuit in EL2 provides a much deeper, different sound than the first model. Cross-modulation expanded as well: VCO3 syncs to VCO2 and VCO2 can now syncs to VCO1 directly. Of course, inspired of the legendary EMS Synthi, but ones you came across both in one room - you will definitely can’t choose which one is better here. EL2 will be never produced again and it’s already a holy grail in the world of analog synths. This exact one is number 15 of 30. Comes with the original power supply. Everything you can see in the pics is included in that sale. Was a beloved studio toy, but now it’s time to go! In excellent overall and technical condition. Please see all pics cause they are a part of description. Free shipping within the US from Brooklyn, NY. International shipping from Brooklyn, NY to any place in the world with a tax free service."

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EMS Rehberg Logik Analog Synthesizer & Keyboard (Made in Germany)

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

via this Reverb listing

Pics of the inside and the user manual below. "This edition is rare, and cannot be found anywhere as a set. Made by EMS London, and works differently than the Synthi A, although it appears to be the same. Here is a breakdown of what you get below:

In addition to the power supply, new patch cables as well as the original patch cables (standard mini jack), the lid of the "suitcase synthesis" and the original manual (or textbook) are included.

The modules of the EMS Synthis work perfectly, the overall sound and especially the filter sound very high-quality.

VCO – Voltage Controlled Oscillator • with the vibration forms sine, sawtooth, triangle and rectangle with external control voltage input for pulse width modulation • VCF – Voltage Controlled Filter • Multimode filter with 12 dB slope, low-pass, high-pass, band-pass and phaser • LFO – Low Frequency Oscillator • with the vibration forms sine and rectangle • SRG – Slow Ramp Generator •

with
the vibration form sawtooth • NG
– Noise Generator •
the noise generator offers white
noise • EG –
Envelope Generator (Envelope
Shaper)
• A-D-S-R • RM
– Ring Modulator • INV – Inverter • SL – Slew Limiter (Portamento) • EF – Envelope
Follower • External Audio
Input • Output/Mix
• Control Inputs"

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MOOG Memorymoog Plus Keyboard Synthesizer SN 3320

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

via this eBay listing

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UDO Super Gemini - Custom Performances By Nick Klimenko

video upload by LFOstore

"LFO Store’s chief sound designer, Nick Klimenko, is proud to present this fascinating soundset for UDO Super Gemini, a 20-voice polyphonic, bi-timbral, binaural analog-hybrid synthesizer.

BUY: https://lfo.sellfy.store/p/udo-super-...

The 'Landscape Observer' soundset brings out the gorgeous powerful tone of this synthesizer with its advanced digital FPGA hardware oscillators and voltage-controlled analog technology.

This set contains sounds useful both for scoring electronic soundtracks and for personal creativity.

Massive cinematic strings, intriguing cosmic pads & drones, modular & evolving arps, multi-layered plucks, and much more - each patch is carefully prepared and can be modulated the sound using velocity, modulation wheel and pitchbend, aftertouch & strip controller.

We wish you a pleasant journey through the sound universe and inspiration in creating your own musical compositions!

In the product pack you will find 64 exclusive patches & 64 performances;
128 sounds & all presets are royalty-free!

These presets are suitable for both studio work and live performances;
PDF file with detailed Installation instructions are included.

Enjoy!"

The Korg Lambda - Strings from Heaven

video upload by Controlled Voltage Sound Labs

"A look at the Korg Lambda String Ensemble from 1979. Video features 2 original songs accompanied by the Linndrum, and a demonstration of all factory presets.

All sounds processed through Eventide Space Reverb

Join us on Patreon! - / cvsoundlabs
INSTAGRAM - @CVSoundLabs


00:00 Intro Song
01:09 Brief Overview
01:39 Factory Presets
04:54 Outro Song"

UDO Super Gemini - "Landscape Observer" Soundset 128 Sounds

video upload by LFOstore

"LFO Store’s chief sound designer, Nick Klimenko, is proud to present this fascinating soundset for UDO Super Gemini, a 20-voice polyphonic, bi-timbral, binaural analog-hybrid synthesizer.

BUY: https://lfo.sellfy.store/p/udo-super-...

The 'Landscape Observer' soundset brings out the gorgeous powerful tone of this synthesizer with its advanced digital FPGA hardware oscillators and voltage-controlled analog technology.

This set contains sounds useful both for scoring electronic soundtracks and for personal creativity.

Massive cinematic strings, intriguing cosmic pads & drones, modular & evolving arps, multi-layered plucks, and much more - each patch is carefully prepared and can be modulated the sound using
velocity, modulation wheel and pitchbend, aftertouch & strip controller.

We wish you a pleasant journey through the sound universe and inspiration in creating your own musical compositions!

In the product pack you will find 64 exclusive patches & 64 performances;
128 sounds & all presets are royalty-free!

These presets are suitable for both studio work and live performances;
PDF file with detailed Installation instructions are included."

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."

Resonant VCF from just 7 basic parts #diysynth #electricalengineering

video upload by Moritz Klein

"Get LABOR: https://www.ericasynths.lv/edu-diy-labor/

This VCF uses fully saturated NPN transistors as makeshift voltage-controlled resistors in a simple RC lowpass setup. Chain two stages, feed the output back into the first stage’s capacitor, and it turns resonant without needing any extra parts. Move the input elsewhere in the circuit and you get a resonant high-pass, too.

BOM:
BC548 x2
33nF film capacitor x2
1M resistor x2
TL072 dual op amp x1"

Additional posts

MEMS Prototype Of The Buchla Location Voltage Processor

video upload by Source Of Uncertainty

"The 223 Location Voltage Processor is intended to be used with the 227 System Interface Module in a quad setup. It contains four separate voltage controlled processors that output an X and a Y voltage for the 227 assign inputs. The top row of knobs defines the operating range by adjusting the baseline of operation. The Balance adjusts the left to right panning. The Cross-Pan controls row modifies both the X and Y outputs and the exact function changes with the setting of the Balance control. These controls are described in more detail under Operations below."

see here

https://www.memsproject.info/

Modulaire Maritime Essaim Quick demo/review

video upload by Meska (Meska)

"quick demo/review of Essaim by modulaire maritime, 2hp VCO build around the SSI 2130 with TZFM/PM capability

Thank you for watching. My name is Meska of the statik collective . I've been making mostly 'dark and expérimental' music for more than ten years now, i'v learn so much online, now it's time for me to share my knoledge, my exploration and this channel is a place to talk about the tools, sound design and techniques to make music with. You can stream my albums and EPs at https://statikwave.bandcamp.com/. If you'd like to support the channel​ consider buying music from bandcamp ;) Contact/booking: meskastatik@gmail.com"

via Modulaire Maritime

https://www.modulaire-maritime.com/product-page/essaim-ѳ Voltage Controlled Oscillator

Provides:
'Thru-Zero' Frequency Modulation / Phase Modulation (selectable)
'SSaw' Wave (Swarm - SuperSaw) /Ramp Wave (selectable)
Sine Wave
Triangle Wave
Hard Sync
Tracks 1V/Octave thru 8 Octaves
Temperature stabilisation

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DIY eurorack modular synth SSI2190 6band Voltage Controlled Filter Bank

video upload by HAGIWO

"My 91th original eurorack modular synth DIY projects.
SSI2190 mixer IC based fix frequency filter bank.
Full analog, PCB-made.

PCB manufacturing data can be downloaded from Patreon.
https://www.patreon.com/posts/pcb-dat...

working documents (schematics)
https://note.com/solder_state/n/ne96e..."

Fugue for My Drum Machine (Piano and Electribe ER-1)

video upload by Hank Mason

"The Korg Electribe ER-1 has 4 voltage-controlled oscillators — the exact number needed for a 4-voice fugue. So I wrote one. Because it seemed like one of the dumbest things I could do with a drum machine.

This is a Prelude and Fugue for the ER-1, performed live with piano accompaniment on an early 1900s Krakauer Bros. grand piano.

GEAR
Korg Electribe ER-1 Rhythm Synthesizer
Krakauer Bros. Grand Piano
MORE INFO
Bandcamp: https://hankthemason.bandcamp.com/alb...
Project page: https://hankthemason.com/projects/fug...
Score: https://hankthemason.com/assets/prelu..."

Doepfer - SuperBooth 26 Demo Patch

video upload by Stromkult

"This patch is built around the A-128 Fixed Filter Bank, one of our classic designs. The filter bank is pinged by a short burst of noise shaped by the new A-142-5(1U) Dual Decay/LFO. Sometimes this module also receives a gate at the Voltage Controlled Loop input, which creates ratcheting-like sounds. The noise also runs through a bandpass filter, with the cutoff being modulated.

To get these sounds on the Fixed Filter Bank, feedback is essential. The short-noise input goes into a mixer, then from the mixer to the filter bank. The output of the filter bank goes into a multiplier; one path goes to the camera, while the other is amplified with the A-119-2 and returned to the mixer with inverted phase. And the whole thing is split and also runs through a BBD, which is why it has a bit of noise."

E-Mu Systems Modular Synthesizer-2 Original Blueprints-Modules VCF+VCA -Brochure

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

via these eBay listings, also on Reverb.

See the seller's other items for more.

"For sale are 2 vintage original blueprints for the modular E-Mu Systems Synthesizer =

- Module 2000 Voltage Controlled Amplifier (VCA) dated 12/05/1977 Nr. =DOC.#2000 - 011-002

- Module 2100 Voltage Controlled Amplifier (VCF) dated 16/09/1974 Nr.= DOC.#2100-011-002

Don't miss out on this historic piece of history.

This is a must-have for any vintage synthesizer/E-MU collector as these are getting very hard/impossible to find these days."

Peviously posted: 1977 E-Mu Systems Modular Synthesizer - Original VCA - 2000 Blueprint

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Monoplex Melodic Microtonal Sequencer - Superbooth 2026 Reveal

video upload by KOMA Elektronik

"We're revealing our Monoplex Sequencer at Superbooth 2026. Come check it out at our booth O400!"

KOMA Elektronik Monoplex
Melodic Microtonal Sequencer
Berlin-based synth makers KOMA Elektronik reveal Monoplex, a performance-driven Eurorack sequencer built for evolving melodic control. Inspired by the Komplex Sequencer, it distills its hands-on philosophy into a focused, single-channel design packed with features. Patch everything into everything and let the melodies evolve.

Every core parameter can be voltage-controlled, opening the door to endlessly shifting yet fully deterministic sequences. From tight Berlin-school patterns to generative melodic systems, Monoplex encourages experimentation.

At its heart is a significantly expanded quantizer. Beyond chromatic, major, and minor modes, Monoplex allows you to upload your own scales via MIDI SysEx using our browser-based tool. Choose from thousands of microtonal scales or create and audition your own instantly.

A dedicated MIDI-note capture mode lets incoming notes define the active scale on the fly. Microtonal scales can also be played on MIDI Synthesizers via Pitch Bend information.

Compact and hands-on, Monoplex delivers an endless supply of melodies and modulations inside your Eurorack system.

Fully CV-able 16-Step Eurorack Analog / MIDI Sequencer
42HP

CV-able Features
First Step (Sequence Start Point)
Sequence Length
Skip Step – Multiple Modes
Gate Length
Repeat Step – Simple or Ratcheting
Glide
Play Mode – Multiple Modes
Transpose
Divisions

Sequencer Features
CV Out
Gate Out
Trigger Out
MIDI Out (Note and CC)
Output Range 2V, 5V, 10V
Unipolar / Bipolar CV-Output
One-Shot Mode
Swing
User Interface Color Changes

Quantizer / User Scales
Wilson MTS-ESP scale system
3 user-definable scales, on-the-fly editing
Live scale upload via web interface directly via browser on PC, laptop and mobile, via SysEx
Live scale input via MIDI, e.g an attached keyboard
Live scale input via slider method on the sequencer itself (future feature)
MIDI implementation via Note On + Pitch Bend information for MIDI synthesizers

Sync
Clock Input
Clock / Division Output
Start Trigger Input & Output
End Trigger
Reset / Pause Trigger Input
MIDI In
MIDI Sync Master / Slave
MIDI Sync Start / Stop


Product page and more info:
https://koma-elektronik.com/monoplex

MSRP: €498,-

Available now through KOMA Elektronik and selected dealers.

Special Announcement from Make Noise!

video upload by MAKEN0ISE

http://www.makenoisemusic.com

"Make Noise is proud to announce Plexiphon!

The Make Noise Soundhack Plexiphon is a stereo, modeless spatial texturizer which allows for continuously morphing between reverberations and multi-tap echoes, the widest range of possible results being neither reverb nor echo, and all results highlighting and amplifying character previously hidden in the source material being processed.

The Plexus control simultaneously modulates the number of feedback paths in the algorithm, and their entanglement together. The Size of the paths determines the temporal relation between them, operating like a “delay time,” or a “room size,” at either extreme of Plexus.

Diffuse and Color offer softening/sharpening/darkening/brightening effects over time.

Couple and Skew are stereo operations: Couple determines to what degree the left and right sides are isolated or intermingled (from “dual mono” to fully interlaced stereo), while Skew offers simultaneous inverse or tandem control of the left and right paths on the Plexus, Size, and Color parameters.

The Send gate input (normalled high, or patchable) determines whether and when the input signal will be fed into the Plexus.

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FLOW 3 | Auto-Dynamic Filter | Quick Overview

video upload by Joranalogue Audio Design

"Flow 3 is a filter that sounds bigger than it looks. Behind the compact 6 HP front panel lies a novel variation on the classic state-variable filter topology, offering simultaneous lowpass, bandpass and highpass outputs.

But the ace up Flow 3’s sleeve is its auto-dynamic nature: it is a filter that can modulate itself. This is achieved by a combined decay generator/envelope follower circuit which controls the filter frequency over an adjustable range."

0:00 intro
3:00 filter sweeps
5:32 quadrature sine VCO
6:20 spectrum splitter
8:15 auto filter
10:52 sine LFO
12:01 pinged percussion
14:00 decay envelope
14:40 envelope follower
16:05 outro

Flow 3 is a filter that sounds bigger than it looks. Behind the compact 6 HP front panel lies a novel variation on the classic state variable filter topology, offering simultaneous lowpass, bandpass and highpass outputs. Core integrator saturation provides for a sound that’s clean, yet distinctive.

The resonance response is exceptionally smooth—and it can easily reach self-oscillation. In this mode, temperature-compensation and exact calibration make Flow 3 a reliable quadrature sine/cosine oscillator with tight pitch tracking.

But the ace up Flow 3’s sleeve is its auto-dynamic nature: it is a filter that can modulate itself. This is achieved by a combined decay generator/envelope follower circuit which controls 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).

CLICK FOR MORE »

1977 E-Mu Systems Modular Synthesizer - Original VCA - 2000 Blueprint

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

via these Reverb listings

See the seller's other listings for more.

"For sale is a vintage original Blueprint for the modular E-Mu Systems - VCA - 2000 Voltage Controlled Amplifier Submodule dated 12/05/1977. DOC.#2000 - 011-002

Don't miss out on this historic piece of history.

I accept offers for this original E-Mu Modular Blueprint.

This is a must-have for any vintage synthesizer/E-MU collector as these are getting very hard/impossible to find these days.

This Blueprint is in very good condition, see the picture's for more detail.

I'm shipping worldwide. The actual shipping-cost must be paid by the winning bidder of this auction. All sales are final. No returns accepted. Selling as is, don't hesitate to contact me for more information and/or picture's.

Please check my other auction's as well, I can combine shipping to reduce shipping-costs . Thank you for your interest."