Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"Rare 1987 Casio SK-8 8-bit sampling keyboard modified with a unique raised console featuring a 20 point ROM modulation patch bay, four illuminated preset effects switches and an illuminated pitch control. This is an otherworldly instrument which will inspire any alternative electronic musician and sound designer. Reed Ghazala named his modified SK units 'Aleatrons' due to their random, unexpected nature so nothing is obvious here- when the patch matrix is in use, the keyboard itself doesn't always function as you'd expect while the modifications open up a world of experimental audio possibilities, far outreaching Casio's original intentions. The pitch controller is switchable and can drop sampled sounds to crashing, aliasing lows.
Showing posts with label DIY. Show all posts
Showing posts with label DIY. Show all posts
Friday, July 31, 2026
Casio SK-8 Sampling Keyboard + Patch Bay + Pitch Mod
See dealers on the right for pricing and availability on gear.
LABELS/MORE: Auctions, Casio, Circuit Bending, DIY, Reverb
LABELS/MORE: Auctions, Casio, Circuit Bending, DIY, Reverb
Jeannie 2
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, Rolf Degen, TubeOhm
LABELS/MORE: DIY, Rolf Degen, TubeOhm
Thursday, July 30, 2026
Roland TR-626 with mods
video upload by Ground Grown Circuits
"Some extra knobs on the TR-626.
Top knob controls sound ROM clock (kinda like a bit rate control) lower knob controls the Gate array clock (pitch). Normally the gate array controls the clock on the sound ROM, so separating them allows you to keep the bit rate high while lowering the pitch and not fully bit crushing the sound (unless you want to)"
See dealers on the right for pricing and availability on gear.
LABELS/MORE: Circuit Bending, DIY, Roland
LABELS/MORE: Circuit Bending, DIY, Roland
Wednesday, July 29, 2026
Analogue Solutions DJMC 2000? - CUSTOM DIY CASE
Note: links to listings are affiliate links for which the site may be compensated.
via this Reverb listing
"Analogue Solutions DJMC — Rare Dual Joystick MIDI Controller (Discontinued / Cult UK Gear)
WITH ORIGINAL DOCS- YOU'RE GONNA NEED THOSEAnalogue Solutions DJMC — Rare Dual Joystick MIDI Controller (Discontinued / Cult UK Gear)
WITH ORIGINAL DOCS- YOU'RE GONNA NEED THOSE
iNSTALLED IN CUSTOM DIY CASE , midi IN, OUT AND THRU
A genuine piece of underground electronic music history: the DJMC by Analogue Solutions, one of the UK's most respected true-analog synth builders. Long before "expressive control" was a marketing buzzword, Analogue Solutions built this twin-joystick MIDI controller with crossfader for performers who wanted real, tactile, two-axis-at-once control over their sound — no touchpads, no menus, just raw hands-on movement.
This thing was never mass produced. Analogue Solutions has since shifted entirely toward their acclaimed eurorack and analog synth lineup (Colossus, Leipzig, Telemark, Nyborg, and more), and the DJMC has completely vanished from their current catalog — it doesn't show up anywhere on their site today. they almost never surface secondhand. If you've been hunting for one of these, you already know how rare a find this is.
Perfect for:
Collectors of obscure UK analog gear
Live performers wanting expressive dual-axis control (filter/resonance, X/Y FX, pitch/mod)
Modular heads running MIDI-to-CV for joystick-driven patching
VJs/lighting rigs that read standard MIDI CC
A genuine, hard-to-find piece from a small builder with a serious cult following in the analog synth world — grab it while it's here, because another one might not turn up for a long time
iNSTALLED IN CUSTOM DIY CASE , midi IN, OUT AND THRU
A genuine piece of underground electronic music history: the DJMC by Analogue Solutions, one of the UK's most respected true-analog synth builders. Long before "expressive control" was a marketing buzzword, Analogue Solutions built this twin-joystick MIDI controller with crossfader for performers who wanted real, tactile, two-axis-at-once control over their sound — no touchpads, no menus, just raw hands-on movement.
This thing was never mass produced. Analogue Solutions has since shifted entirely toward their acclaimed eurorack and analog synth lineup (Colossus, Leipzig, Telemark, Nyborg, and more), and the DJMC has completely vanished from their current catalog — it doesn't show up anywhere on their site today. they almost never surface secondhand. If you've been hunting for one of these, you already know how rare a find this is.
Perfect for:
Collectors of obscure UK analog gear
Live performers wanting expressive dual-axis control (filter/resonance, X/Y FX, pitch/mod)
Modular heads running MIDI-to-CV for joystick-driven patching
VJs/lighting rigs that read standard MIDI CC
A genuine, hard-to-find piece from a small builder with a serious cult following in the analog synth world — grab it while it's here, because another one might not turn up for a long time"
via this Reverb listing
"Analogue Solutions DJMC — Rare Dual Joystick MIDI Controller (Discontinued / Cult UK Gear)WITH ORIGINAL DOCS- YOU'RE GONNA NEED THOSEAnalogue Solutions DJMC — Rare Dual Joystick MIDI Controller (Discontinued / Cult UK Gear)
WITH ORIGINAL DOCS- YOU'RE GONNA NEED THOSE
iNSTALLED IN CUSTOM DIY CASE , midi IN, OUT AND THRU
A genuine piece of underground electronic music history: the DJMC by Analogue Solutions, one of the UK's most respected true-analog synth builders. Long before "expressive control" was a marketing buzzword, Analogue Solutions built this twin-joystick MIDI controller with crossfader for performers who wanted real, tactile, two-axis-at-once control over their sound — no touchpads, no menus, just raw hands-on movement.
This thing was never mass produced. Analogue Solutions has since shifted entirely toward their acclaimed eurorack and analog synth lineup (Colossus, Leipzig, Telemark, Nyborg, and more), and the DJMC has completely vanished from their current catalog — it doesn't show up anywhere on their site today. they almost never surface secondhand. If you've been hunting for one of these, you already know how rare a find this is.
Perfect for:
Collectors of obscure UK analog gear
Live performers wanting expressive dual-axis control (filter/resonance, X/Y FX, pitch/mod)
Modular heads running MIDI-to-CV for joystick-driven patching
VJs/lighting rigs that read standard MIDI CC
A genuine, hard-to-find piece from a small builder with a serious cult following in the analog synth world — grab it while it's here, because another one might not turn up for a long time
iNSTALLED IN CUSTOM DIY CASE , midi IN, OUT AND THRU
A genuine piece of underground electronic music history: the DJMC by Analogue Solutions, one of the UK's most respected true-analog synth builders. Long before "expressive control" was a marketing buzzword, Analogue Solutions built this twin-joystick MIDI controller with crossfader for performers who wanted real, tactile, two-axis-at-once control over their sound — no touchpads, no menus, just raw hands-on movement.
This thing was never mass produced. Analogue Solutions has since shifted entirely toward their acclaimed eurorack and analog synth lineup (Colossus, Leipzig, Telemark, Nyborg, and more), and the DJMC has completely vanished from their current catalog — it doesn't show up anywhere on their site today. they almost never surface secondhand. If you've been hunting for one of these, you already know how rare a find this is.
Perfect for:
Collectors of obscure UK analog gear
Live performers wanting expressive dual-axis control (filter/resonance, X/Y FX, pitch/mod)
Modular heads running MIDI-to-CV for joystick-driven patching
VJs/lighting rigs that read standard MIDI CC
A genuine, hard-to-find piece from a small builder with a serious cult following in the analog synth world — grab it while it's here, because another one might not turn up for a long time"
See dealers on the right for pricing and availability on gear.
LABELS/MORE: Analogue Solutions, Auctions, DIY
LABELS/MORE: Analogue Solutions, Auctions, DIY
PlantsSystem-KOSMOS3 InteractiveReverb
video upload by plantssystem
"KOSMOS3 is an interactive reverb instrument that transforms reverberation from a static audio effect into a playable, responsive acoustic space. Instead of applying a fixed ambience, KOSMOS3 continuously reshapes its internal reverb field based on incoming audio, gestural control, and real‑time modulation signals.
At its core is a multi‑parameter reverb engine capable of smooth, expressive morphing across decay, diffusion, pre‑delay, and spectral balance. These parameters respond immediately to performance input, allowing the reverb to behave like a dynamic environment rather than a background effect.
Key features include:
Interactive control via MIDI, OSC, TouchOSC, and HID
Real‑time modulation for shaping spatial texture during performance
Headless operation suitable for installations and long‑running setups
Instrument‑like behavior where the reverb becomes an active part of the performance
KOSMOS3 functions not merely as an effect processor but as a playable acoustic space—a reverb you can push, bend, and sculpt in real time."
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, GreyScale, New DIY, New Synth Effects, News
LABELS/MORE: DIY, GreyScale, New DIY, New Synth Effects, News
PAiA Proteus Vintage Synthesizer Demo - For Sale
video upload by tonetweakers
"Here’s the PAIA Proteus vintage analog synth we recently restored, a process requiring 21 hours of skilled vintage synth tech time. Read about it on our website.
Buy vintage gear that works like new at tonetweakers.com
We buy sell trade refurbish vintage synths and electronic musical instruments."
Sunday, July 26, 2026
Two classic 1980's #synthesizer recreations for less than $30? And Eurorack compatible. How...?
video upload by voltryx
"A Juno-6 and DX7?"
"In this video I take a look at the AMY board: a tiny, affordable ($29) Arduino-based DIY synth module built around the open-source AMY synth library. It packs USB, an SD card slot, digital and analog audio, MIDI, and CV I/O into a board small enough to fit straight into a Eurorack case.
I go over what the board actually is and what's in the box, then jump into a MicroPython REPL to show how the AMY library's synth, voice, oscillator model works, patching up a simple sine voice, triggering notes, and using the built-in PCM/sample engine and tag-based sequencer to create a basic drum pattern. From there I install it in my Eurorack rack, run through the signal chain (MIDI in from the Hermod+, CV/audio out, self-modulation via CV), and share some closing thoughts on where it's strong, where it's limited compared to something like the Disting NT, and what I want to try next (serum-style bass patches with compression/distortion).
If you've got one of these boards — or you're thinking about picking one up — let me know what you're building with it in the comments.
Timestamps:
0:00 Intro & preview
0:31 What is the AMY board?
1:43 Using AMY standalone (MIDI / SysEx / REPL)
2:01 MicroPython REPL walkthrough — synths, voices, oscillators
3:01 PCM sample oscillator & built-in sequencer (drum pattern)
4:22 AMY in the Eurorack rack — signal chain & modulation
6:04 Final thoughts — value, limitations, what's next
7:01 Outro"
Hermetic Modular - Launch Announcement - New Open Source Eurorack Manufacture
video upload by Hermetic Modular
"Introducing a new modular synthesis company. Shipping early July.
Hermeticmodular.com
Open source!
Thank you to Victory Nguyen for performing, Justin Benjamin for the good camera work (all bad camera work should be attributed to me), and Greg Dixon for some of the excellent sound design demos."
How do you test 36,700 LEDs?
video upload by Hermetic Modular
"Run a burn in test! Enjoy 10 minutes of the uninterrupted test - an important step in the QA process. This runs for a minimum of five hours per board.
Proper eurorack LED ring pot feedback.
And all 3060 of these LEDs pictured passed :)
Music credit to @adamwonak on IG - "abstract" from 202606 on Bandcamp now."
ECHOA STEREO DUAL DELAY AND REVERB PROCESSOR
Four delay lines total — two per stereo channel. Morph delay into reverb from first principles, from clean digital delay to smeared, textured reflections. Route the four lines in series, parallel, isolation, or spectrally. Presets, parameter lock on every pot, character engines, and more.
TIME
Delay time from 1 ms to 16 seconds, up to four taps per delay line, configurable for your sound design. Feedback up to and past unity, and a dry/wet mix per channel. Freeze delay buffers, set tempo with tap on the line buttons, or patch a clock and lock each line to a musical division. Linear or logarithmic time taper options: a full featured, clean delay line.
SPACE
Bend echoes into reverb. Diffusion sweeps a four-stage Schroeder all-pass network from discrete repeats to a wash. Bloom grows short, fixed loops into long modulated plate and hall tails. Damping is bipolar from noon — counter-clockwise darkens the tail, clockwise thins and brightens it.
ENGINE
Degrade each line's voice across with four engines — digital, BBD, tape, vinyl. Saturation, bandwidth limiting, compander, wow and flutter, hiss, crackle, digital glitches. Depth scales from bit-pristine bypass, to a gentle touch of character, to destruction.
CONFIGURABLE FOR PERFORMANCE ROUTING
Parallel, series, mono, or spectral delay-line topologies.
CV MAPPING
Per-CV destination, with attenuverters on every input.
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, Hermetic Modular, New Makers, New Modules, News
LABELS/MORE: DIY, Hermetic Modular, New Makers, New Modules, News
Minitron synth (Mellotron+Minilogue)
video upload by Love Hultén
"Commission piece incl Mellotron M4000D, Korg Minilogue, Microcosm, Chroma Console and a custom tape echo. In the video I’m using the Mellotron as lead over a Minilogue seq, but the synths can also be played simultaneously for joined voices"
See the Love Hulton label below for additional creations.
Please steal this FM synthesizer UI idea (ESP32-P4 DIY FM synth)
video upload by Floyd Steinberg
"I built a simple 4 operator FM synthesizer using Elecrow's 10.1 ESP32-P4 smart screen ( https://tidd.ly/4yIlbuX ). Nothing groundbreaking, but I want to show you an UI idea I had, and if you're convinced, please start using it in your FM synths.
00:00 hi, what's this?
01:03 ESP32-P4 panel features
02.47 How to install ESP-IDF 5.4.4 in Visual Studio Code
04:29 A problem with common FM synthesizers
06:13 Reminder: FM principles
06:43 My UI idea
08:22 Sound demo
09:10 Conclusion
Thanks, www.elecrow.com
HÄLP ZIS CHANNEL
https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"
This 4HP Eurorack Module Just Got INSANE
video upload by wgd modular
⏱️ Chapters
00:00 – Intro
00:14 – What happened since the last video? [embed below]
00:54 – New panels
01:17 – Fixing the noise problem
01:50 – Melon in live performances
02:03 – Firmware flashing infrastructure
02:32 – Updates to existing firmwares
03:08 – New firmwares
03:18 – Metal Hit
04:14 – RALPS
04:50 – Reese Bass
05:29 – Drums
06:26 – fxloperformer
07:29 – Final thoughts
"In this video, I’m taking a look at what has happened to melon since my last video. My 4HP Eurorack adaption of Hagiwo’s amazing RP2350-based MOD2 has grown quite a bit since then, with new panels, new firmware, community contributions, and improvements to the overall infrastructure.
Saturday, July 25, 2026
ESP32-S3 Synth project - Sound Demo
video upload by Bad Dog Designs
"This clip shows some of the range of sounds the synth produces. The Architecture is natively stereo, so put your headphones on!
I've added patch recall and storage via SD card, and got the arpeggiator running, so some of the sounds in the clip are just the arpeggiator, and I then adjust gate length / release / frequency etc.
Got a couple of little bugs to work on, but I'm pretty pleased with how it's progressed to date! Hope you enjoy the sounds :)"
Thursday, July 23, 2026
New Enclosures for MidiVolts Desktop and Poly Sequencer!
video upload by Space Brain Circuits
"MidiVolts Desktop:
https://spacebraincircuits.com/pages/...
Poly Sequencer:
https://spacebraincircuits.com/pages/...
Upgraded Sheet Metal Enclosures:
https://spacebraincircuits.com/produc..."
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, Space Brain Circuits
LABELS/MORE: DIY, Space Brain Circuits
BCR PRESENTS THE KIDS WANT TECHNO W/ GHOST IN TRANSLATION
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, Ghost In Translation, MATRIXSYNTH Members
LABELS/MORE: DIY, Ghost In Translation, MATRIXSYNTH Members
Dutch STEIM Zwarte Dozen Systeem - Sound Demo with Novanex Delay.
video upload by Acid Solder Club
"Short jam of patching with the rare Dutch modular synth system that started out around 1974 within the STEIM Studio for Electro-Instrumental music.
Since 2022 Veerle (Elektortek) got her hands one this system, in total consisting out of 4 rows of "cassettes"/modules (34 total modules, 4x patch matrices). It needs quite some servicing and repair, but als a lot of cassettes survived the forces of time.
Since last year the system is based at Acid Solder Club Utrecht, Veerle's creative electronics/ DIY and synth workshop and experimental sound studio based in Utrecht, the Netherlands. Together with a small team (herself, Rob vd Poel and Sybren Danz) we are searching for documentation, video materials, schematics and all kinds of doodled and sketched info, that most unfortunately, is lost in time.
We are currently also working on a digital archive with stories, patch ideas, a new service manual and repair blog.The process is slow, since a lot of information is lost and we are looking at similar circuits at the time, and digital and book references to help the build.
Follow Acid Solder Club insta and socials for quick updates!
@acidsolderclub
/ acidsolderclub
No post processing anything, and also no filter (yet, in service) or envelopes so it was quite challenging and not really all volume levelled out and such but meh, that's not the point of this video :)
Casettes used in this patch:
V.C Quadrature Oscillator
3x VCO/LFO
ProductModulator
Dual amplifier divider
Inverter
Dual VCA
2x Matrix patchpanels
NOVANEX Sound Shifter SS12000.
that was in the workspace for servicing for the Re:vive Studio, based inside the Instituut of Image and Sound in Hilversum.
https://revivethis.org
https://www.beeldengeluid.nl"
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, exclusive, exclusive2026, STEIM
LABELS/MORE: DIY, exclusive, exclusive2026, STEIM
He Made A DRUM MACHINE From An Old Organ Found In The Trash!
video upload by THIS MUSEUM IS (NOT) OBSOLETE
"Veerle (Acid Solder Club) shows us some cool things she brought to the museum."
Longer drum video:
From STINKY Electronic Organ To HARDCORE Drumcomputer!
video upload by Acid Solder Club
"Episode 1 where we disassemble 2 electronic organs the Riha107 and Riha730, both were in bad condition and ready to end up on a landfill.
This video is about taking them apart, finding useful elements and pcb's and build it into a new electronic hardcore drumcomputer that you can build at home too!
Part of a multiple episode series, and checkout the video at THIS MUSEUMS (NOT) Obsolete as well where we tryout one of the organ salvaged drumcomputers in the museum together with Mitch!"
Previously:
Re-using parts of organs for rhythm machines - first test and explorations
video upload by Acid Solder Club
"This is a first test and tryout for looking at possibilities of re-using printed circuit boards of old organs that are no longer usable and re-casing them in new ways.
In this video I've swooped the inside of a KAWAI organ donated by Vincent /Vinnieragua out of the dust, and triggering the sounds of the drummachine board with triggers from modular synthesiser module the "Turing Machine" by Music Thing Modular.
This is a first pilot and proof of concept in a series of follow up projects of re-using organs that are no longer serviceable either due to poor conditions, lost knowledge or other reasons."
Tuesday, July 21, 2026
Direct Cut dos bons
Monday, July 20, 2026
EMS 256 Sequencer Repair Part 2 Re-Cap circuit cards and devising a plan.
video upload by Really Nice Audio
Really Nice Audio EMS 256 Sequencer posts
"What is the likelihood due you think I will get this sequencer fully functional? I am now able to see the memory fill up when using a key input. The hardest thing for me to work out was a strategy for the repair. Considering how old this unit is will I find many broken logic IC's?
It is hoping to play some music in September, let me know your thoughts below.
https://paymentportal.uwl.ac.uk/confe...
This is part of the Pete Townshend Synth Collection at the University Of West London
https://www.uwl.ac.uk/study/study-fac..."
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, EMS, synth guts, Synth Techs
LABELS/MORE: DIY, EMS, synth guts, Synth Techs
Sunday, July 19, 2026
KiCad in 5 minutes: Designing an SMD PCB for my $30 chord sequencer + firmware updates
video upload by Floyd Steinberg
"I finally learned KiCad and with the help of PCB Way https://www.pcbway.com/activity/anniv... or https://pcbway.com/g/4nkLCf , I created an SMD PCB for my $30 chord sequencer, and I added all the features you asked for after the last video on this project. Table of contents:
00:00 short demo
00:07 hello, what's this?
00:58 KiCad design quick walkthough
05:04 a parcel from PCB Way!
06:36 creating some JST adapter cables
07:04 my thoughts on the whole process, and some advice (read those spec sheets!)
08:36 Quick overview: Analyzing chords and using suggested chords
09:43 chord complexity selection
10:05 passing chords
10:43 santanic chords
11:34 rolling chords
12:07 reacting to velocity
12:29 bass: root note
12:44 bass: key root note
13:04 swipe menus
13:23 sending CC data with the ring
14:04 arpeggiator
14:48 user arpeggiator patterns
16:08 chord sequencer + auto chord progression
17:07 multitimbral multitrack demo (Montage M)
17:57 conclusion and where to get
HÄLP ZIS CHANNEL
https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"
Previously:
This $30 chord sequencer adds more Gospel to your music #synth #midicontroller
video upload by Floyd Steinberg
"I built a nifty little MIDI device that might help you find some interesting new chord progressions. This runs on a 1.28" CrowPanel by ELECROW ( https://tidd.ly/49pImPW , or the new 1.46" version https://tidd.ly/4u51ZEi ) for roughly $30. Table of contents:
00:00 hi, what's this? + quick demo
00:40 sponsored by ELECROW
01:05 hardware needed
02:01 Yes, I came up with the firmware, but that's not important here
02:44 you'll need an external sound source #synthesizer and set it to local mode
03:15 you can play on the device itself or on a midi keyboard
03:28 basic usage
03:49 emotional chords!
04:41 ... or not
05:05 chord analyzer
05:52 passing chords
06:33 bass (chord root + key root)
07:23 this channel needs you support
07:48 trigger key changes (some music theory)
09:15 functional chords, related keys and chromatic/altered chords
09:53 chord sequencer
10:44 flip the screen
11:13 disarm the passing chord function
11:19 some interesting details (automatic voicing, slightly random velocity and more)
12:19 playing "chord melodies" and throwing some "emotional chords" in (proof of practicability)
12:45 using the device to create chord progressions in other sequencers
13:02 a short improvisation (left hand: chord machine, right hand: keyboard)
14:16 conclusion, and some more ideas (and why I need your help)"
See dealers on the right for pricing and availability on gear.
LABELS/MORE: DIY, Floyd Steinberg, MATRIXSYNTH Members, New Makers
LABELS/MORE: DIY, Floyd Steinberg, MATRIXSYNTH Members, New Makers
Jeannie2 - Wavetables
video upload by Rolf Degen
"Jeannie 2 - Polyphonic DIY Synthesizer & Sampler
Part - Wavetables
Diy blog: https://www.sequencer.de/synthesizer/..."
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MATRIXSYNTH - EVERYTHING SYNTH
© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH



























