FLEA MARKET / FUSE / DIY - SYNTHI (with internal spring reverb) by Jacob Steel

video upload by jacobsteel

"DIY Synthi - piano stand test! #synthesizer #electronicmusic #synth #synthi #diysynthi #matrixsynth"

And a playlist in chronological order:


"Currently running the following:

Oscillators 1-4 - started out with the XR2206, schematic, pretty much from the data sheet. This part is the crazy chaos part. The XR2206 can be amplitude modulated as well as frequency modulated (here with a button) Oscillators 5-6 - Digital (this part will be CV volt-octave controlled) https://www.alldatasheet.com/datashee...

Envelope - 555-based envelope, similar to "the fastest envelope in the west" https://www.schmitzbits.de/adsr.html"

Playlist:

1. DIY SYNTHI first test all components
2. DIY Synthi longer demonstration….
3. DIY Synthi, stick demonstration
4. DIY Synthi - CV to Matrix test
5. Ölands Norra Udde - the Northern Head of Öland (DIY Synthi jam)
6. Alla världar som finns - (All Worlds That Exist) voice/lyrics Johan Holmlund
7. Synthi - Piano short improv

[$11] DIY eurorack modular synth 5step Sequencer | Arduino nano based

video upload by HAGIWO

"My 88th original eurorack modular synth DIY projects.
Arduino nano based 5step CV/Gate sequencer , Buchla Easel inspired.
Digital control , Analog output.

working documents (schematics,code)
https://note.com/solder_state/n/nf6c2...

Please support me to continue projects.
In patreon you will find content about my background , technical information.
/ hagiwo

-------------------------------------------------------------
Repository of HAGIWO's DIY Modular Synth
https://note.com/solder_state/n/n54e0..."

Roland Future Design Lab and Neutone Introduce Project LYDIA

Press release follows:

A Technology Preview Exploring AI, DIY Culture, and the Future of Music Creation

Los Angeles, November 11, 2025 — Roland Future Design Lab, the advanced technologies research group of Roland Corporation, announces Project LYDIA, an audio processing platform preview created in collaboration with Neutone, developers of next-generation AI tools for musicians and artists. Project LYDIA merges Neutone’s trainable AI software with Roland’s hardware expertise, using a Raspberry Pi 5 single-board computer to deliver a compact, stage-ready prototype that reimagines DIY innovation for a new generation.

Bridging AI and DIY Creativity
Roland’s legacy in DIY music creation began in 1981 with AMDEK (Analog Music Digital Electronic Kits), a line of build-it-yourself kits that encouraged musicians to experiment with technology. Today, Roland Future Design Lab revisits that spirit, asking how modern creators can explore sound through emerging AI tools.

AI for Sound Discovery and Exploration
Powered by Neutone’s Morpho technology, Project LYDIA, named after DIY and AI, uses “neural sampling” to learn the tonal qualities of any sound and apply it to another in real time, with the sonic results ranging from highly musical to exotic and surprising. The current Project LYDIA mockup houses a Raspberry Pi 5 computer running Neutone’s special version of Morpho alongside Roland’s latest ideas for a simple, tactile control panel. Audio I/O is currently managed via a USB-connected Roland Rubix interface, with future iterations aiming to fully integrate I/O for a completely self-contained device.


AI Innovation at Roland
Project LYDIA builds on Roland’s growing exploration of AI as a creative partner for musicians. In 2024, Roland and Universal Music Group (UMG) jointly introduced the Principles for Music Creation with AI, a framework outlining shared commitments to ethical and artist-centered innovation.
“Roland has taken a leadership role globally in practicing responsible development with AI for music creation,” said Paul McCabe, Senior Vice President of Research and Innovation at Roland. “Part of being responsible is getting input from creators on what they find useful, helpful, or inspiring, and what ideas may not be welcome in their workflows. Releasing Project LYDIA as a technology preview allows us to demonstrate possibilities, seek community input, optimize, and improve.”

Shaping the Future Together
Project LYDIA debuted at the Audio Developer Conference taking place November 10 through November 12 in Bristol, UK, inviting feedback from the creative community to guide future research in AI-driven music tools. Musicians and makers can share their thoughts and ideas via a short survey here.

To learn more about the inspiration and technology behind Project LYDIA, visit Roland’s feature story on Roland Future Design Lab.

CLICK FOR MORE »

New DIY Digital Touch Synthesizer & Hybrid 5V Modular

video upload by Dylan B.

https://loess-labs.net/inst/atmega/

"Fully open source, build your own! Webpage is a work in progress. Might make a PCB at some point but no promises.

Also just to be clear the intro and outro parts use external fx to varying degrees. The middle part where I'm talking is the 100% dry sound.

0:00 - Demos/Intro
1:29 - Talking
5:03 - Outro Song"

Hybrid 5V Modular

video upload by Dylan B.

"Schematics and such will be out when the PCBs are

0:00 - Talking
2:26 - Bukla Melodic
3:27 - Acidic
5:36 - Crazy FM"

Going with Loess Labs for the label on these.

SenSinth - VP+ .Самодельный звуковой синтезатор

video upload by VladimirRadiomay

Eglish below.

"Сенсорный синтезатор звука.
Режим сенсорной подачи созвучий.
Режим постоянного звука.
Режим подачи звука пачками, пульсацией.
Режим плавающего тона.
Четыре пары верхних сенсоров - 4 тона в с октавной разницей.
Нижняя пара - другой тон, подстраивается ручкой для минорных и мажорных созвучий.
Кнопки для добавления призвуков. Кнопка пульсации.
Ручка тембра и громкости.
-----------------------------------------------------------------------
Поддержать:
Если вам нравится моё звуко-творчество и вы хотите отблагодарить меня, вы можете сделать это добровольно переводом на мою карту Сбербанка: 2202 2062 7925 5298
(Пожалуйста, указывайте в комментарии к переводу «Поддержка творчества»)
Спасибо каждому, кто помогает. Это мотивирует меня создавать новую музыку и браться за не лёгкий труд составления схем этих синтезаторов."

Googlish:

"Touch sound synthesizer.
Touch mode for supplying consonances.
Continuous sound mode.
Burst and pulsating sound mode.
Floating tone mode.
Four pairs of upper sensors - 4 tones with an octave difference.
The lower pair is a different tone, adjusted with a knob for minor and major consonances.
Buttons for adding overtones. Pulse button.
Tone and volume knob.
-----------------------------------------------------------------------
Support:
If you like my sound creativity and you want to thank me, you can do it voluntarily by transferring to my Sberbank card: 2202 2062 7925 5298
(Please indicate in the comments to the transfer 'Support creativity')
Thank you to everyone who helps. This motivates me to create new music and take on the difficult work of drawing up the circuit diagrams of these synthesizers."

Vactrol phaser filterboard [prototype] for gotharman's instrument

video upload by Meska (Meska)

"DISCLAMER : i have no affiliation with gotharman's instrument , just a third party builder

Quick sound demo of the Vactrol phaser filterboard, compatible with Gotharman's instrument, im working on. Still have some small things to do on the next proto, like rewire the Qbend switch.
If you have any question or sugestion feel free to ask.



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"

Photosynth by Reco-Synth

video upload by Arthur Joly

demo of the b4Modular Series 7 synthesizer part 1 / 2 : the suitcase

video upload by elektronengehirn

"The diy modular synthesizer in a suitcase which Malte Steiner developed between 2024 and 2025. The goal was to build a cheap modular system mainly for live concerts, which is repairable and can go into Checkin Luggage without much worries (something you don't do with Eurorack). So far it is used for several concerts by the projects Elektronengehirn and Notstandskomitee in Berlin and Helsinki, and local Jam sessions here in Aalborg. It is build in a Nanuk 923 case which can remove the lid, the rails are made of wood and wood screws, the front plates are 3D printed.
The system features 2 analog Oscillators / LFOs, one digital oscillator with 6 different modes, an oscillator bank with 6 square waves, triple clock module, 3 slew limiters, a lowpass filter, tone control filter, wave folder, one ring mod / wave folder, 5 VCAs, crossfader, mixer, 2 pressure sensors, a trigger button, unity and gates mixer.
See it in action at this Notstandskomitee concert in Helsinki:"

Notstandskomitee concert Helsinki 17. May 2025

video upload by elektronengehirn

"Notstandskomitee concert 17. May 2025 at Algorave Helsinkis Object Permanence festival at Caisa Cultural Center Helsinki (FI).
Playing tracks from current album The Doomsday Layout
https://notstandskomitee.bandcamp.com

Live coding concert with Steiners own software gravel, augmented with a digital synthesizer he developed 2 years ago and the DIY modular he developed in the last months. Visuals are made with a custom software created with the open source Godot game engine, controlled by the live coding environment via OSC.
https://www.block4.com

Booking is handled through: booking AT tmkm DOT dk

Coverpicture by Juho Liukkonen"

BE A BETTER MODULATOR // Understanding Eurorack Modulation with the Thonk TRIPLE MOD

video upload by DivKid

"In this video we’ll break down how common types of modulation for sound synthesis work, how to make the most of them creatively and musically. We’ll do so while demoing the new Triple Mod DIY module from Thonk. Whether it’s creating multi-phonic layered patches needed multiple envelopes, understanding how a Turing Machine works and performing with it, understanding and making Sample & Hold melodic, creating chain reactions with EOC ‘end of cycle’ triggers … there’s lots in this video applicable to LOTS of other modules."

CLICK FOR MORE »

[$27] DIY PCM MIDI Sound module | SAM2696 & XIAO MIDI Synthesizer based

video upload by HAGIWO

"PCM MIDI sound module based on the Seeed Studio XIAO MIDI Synthesizer. It plays using external MIDI signals, and the four built-in buttons can also be used to change parameters. working documents (schematics & source code) https://note.com/solder_state/n/n1f2e... XIAO MIDI Synthesizer https://www.seeedstudio.com/XIAO-MIDI..."

You can find an overview video of the Seeed Studio XIAO here.

HOW TO Mod Your Own Drum Machine!

video upload by foleytronics fx repair

Dr. Bohm home organ, rhythm, fun machine. Overview at 3:53.

"In this vid, Charlie explains how he went about modding this very cool and rare Dr. Bohm drum machine. For a more in-depth video on how to mod your own drum machine, please subscribe to our Patreon!"

Patreon: / foleytronics

In The Pines website: https://www.inthepines.band/

Bad Dog Designs OSPRAY 8 Drum Synthesizer

video upload by Pro Synth Network

"I have been very privileged to test, advise, and consult with Paul at Bad Dog Designs on this brilliant drum synthesizer. Taking circuit designs that were over 40 years old, published in E&MM magazine, Paul has recreated and refined these three drum synth designs to create OSPRAY-8, a "vintage" 21st century drum synthesizer.

Four drum modules, three cymbal modules and a clap module, triggerable via MIDI or CV and with a stereo audio output or individual mono outputs per drum, this is the sound of the nascent analog drum synth of the 1980s in a beautiful handmade case.

For more information and details on how to get your hands on one, contact Bad Dog Designs to register your interest.

https://www.bad-dog-designs.co.uk/con..."

OSPRAY8 Analogue Percussion Synthesizer Demos

video upload by Bad Dog Designs

"After about 4 months on and off, I've got my percussion Synthesizer in a state where I'm happy with the look and sounds :)

All original 1980's circuit designs with just a few component changes for later IC's, and of course Midi In and through as well as individual trigger inputs.

The OSPRAY-8 ( Old School Percussion Right At Ya! ) comprises 8 individual modules, arranged as 4 X Drum modules / 3 X Cymbal modules / 1 X Handclap module. There is then a final control module that handles midi, midi channel selection and Stereo output.

The Drum Module can generate a multitude of sounds from Bass drums to Snares, Toms, Rimshots, bleeps and other weird and wonderful sounds.

The Cymbal Module can generate Open and Closed Hi-Hats, Gongs, Cowbells as well as other metallic oddness.

The Handclap does as it says, but will generate multiple claps with full control of frequency / resonance / ambience etc.

As each module has it's own line out and trigger in, you can join two together, so you can combine a handclap with a drum and get a really sharp and punchy snare for example.

The front panel is machined from a single piece of aluminium, the lettering engraved into the surface for a well engineered finish. The Casing is still in development, but you can see a mock up in the clip.
All the audio is straight out of the OSPRAY-8 with no processing."


via Bad Dog Designs

"The Ospray-8 is a fully Analogue percussion synthesizer, housed in a free standing desktop format. The sounds are produced by entirely analogue electronic modules, tailored for different percussive sound types. The Ospray-8 contains 8 modules connected together, comprising of 4 X Drum Modules, 3 X Cymbal Modules and 1 X Handclap module. There is then a housekeeping module that handles midi control, and stereo outputs."

CLICK FOR MORE »

*Photuris* Electronic Mallet Instrument

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

via this Reverb listing

CLICK FOR MORE »

Erica Synths Introduces New Elektor Formant DIY Modular Synth

sound demo video upload by Erica Synths

"Since Erica Synths originated as a company that originally developed DIY kits for Eurorack modular synthesizers, we want to keep the spirit of DIY synths alive and besides our mki x es.EDU DIY series, we went full in, and set out to develop a contemporary, DIY-friendly and extended version of the Elektor Formant synthesizer, originally published as a DIY kit in Elektor Magazine late 70-ties. In collaboration with Harald Antes of haraldswerk.de we developed a modular system based on Elektor Formant designs and added several modules to take its functionality to next level

Timeline:
00:02 - Patch 1
00:59 - Patch 2
02:08 - Patch 3
02:58 - Patch 4
03:50 - Patch 5"

Also see: A 100% Modern Remake Of The 1970's DIY Formant Synthesizer By Erica Synths? Lets Solder it!

CLICK FOR MORE »

the NSA selector - a Eurorack module

video upload by wenzellabs

"this video shows some of the capabilities of the NSA selector, a Eurorack module by wenzellabs.

more documentation: https://github.com/wenzellabs/the_NSA...
assembly instruction: • the NSA selector kit assembly [below]
purchase the NSA selector in my little shop: https://lectronz.com/products/thensas...

00:00 0) Intro and overview
04:33 1) sequencer using ping
14:15 2) echo effect through tcpdump
13:00 3) helicopter sounds from tcpdump
14:05 4) link saturation by traffic amplification
16:20 5) terminal sounds through ssh
19:02 6) remote desktop forwarding xeyes
20:30 7) remote desktop forwarding browser
24:48 8) accidential drone synth from 2048.org
28:05 9) what google maps sounds like
30:13 10) listen to bitmap images in the browser
38:39 11) translate .wav samples to NSA's native format by a sigma delta upconverter"

the NSA selector kit assembly

video upload by wenzellabs

"this video explains how to assemble the kit version of the eurorack module "the NSA selector" by wenzellabs.

buy at https://lectronz.com/stores/wenzellabs"

This one is in via Ivan.

what is it
the NSA selector is a eurorack module with two ethernet jacks and one audio output. any bit on the network will be sent to the audio output.

what it's not
this is not an "audio interface". we do not play back any "format" such as RTP or MP3 or WAV ot the like. the eurorack module does not "speak" any protocol. all traffic is forwarded from one network jack to the other unmodified. it's just tapped, intercepted to convert it to audio.

CLICK FOR MORE »

WHY OPEN SOURCE IS KING: 3 New Kits for Our 8‑Bit Eurorack Drum Module

video upload by wgd modular

"In this video, we take another look at UTF-8 SAMPLIFIED – the fully open-source 8-bit Eurorack drum module I released with ASCII Synth. It’s made its way into racks all over the world, and even into DIY workshops like the one run by mzourack at Noise Kitchen in Prague.

Now it’s getting even better:

Thanks to a pull request by community member poetaster, three new kits have been added: 808, Jungle, and Beatbox – plus a handy wav2c.py script that lets you convert your own samples into custom kits!

Check out the GitHub Repository:

🔧 https://github.com/wgd-modular/utf-8-...
📚 Wiki and build instructions: https://github.com/wgd-modular/utf-8-...
🔌 Flash your module online: https://wgd-modular.github.io/ut-flas...

📖 Chapters:

0:00 – Intro
0:05 – Our drum module: The story so far
1:44 – PCBWay Advertisement
2:15 – Demo 1: Jungle kit
4:01 – Demo 2: 808 kit
6:20 – Ending words"

FREE OPEN SOURCE DRUM MACHINE DESIGN! DIY BUILD + DEMO

video upload by wgd modular

"In this video we are building a tiny - almost credit card sized - drum machine called UTF-9 SAMPLIFIED. It is based on the bleep drum. Check out my version on GitHub:

https://github.com/wgd-modular/utf-9-...

Original bleep drum design: https://bleeplabs.com/product/the-ble...
My eurorack footprints: https://github.com/wgd-modular/eurocad

00:00 - Hello!
00:06 - Tiny drum machines?
01:15 - PCBWay Sponsorship
01:31 - Building the Drum Machine
02:17 - Jam 1
03:31 - Jam 2 using MIDI"

Cheerful Electronics OPL Studio - First Contact

video upload by j bowman

"🎵 Welcome to Cheerful Electronics OPL Studio - First Contact! 🎛️ In this sound design experiment, we dive deep into the world of FM synthesis using the powerful OPL Studio, exploring retro sounds inspired by classic OPL3 chips. Whether you're a fan of chip music, vintage FM synths, or curious about pushing the limits of sound design, this video is your perfect starting point.

Get ready for rich, textured tones and quirky sonic explorations as we showcase the raw potential of OPL Studio. This first contact session covers live tweaking, patch creation, and modulation — perfect for anyone diving into retro synth workflows or looking for viral FM synthesis content.

If you're into chiptune, retro game soundtracks, or nostalgic hardware-driven music, you'll feel right at home. Watch now and get inspired to experiment with your own OPL3-based synths and plugins!"



via Cheerful Electronics

OPL Studio is the ultimate OPL2 / OPL3 synthesizer! It gives you almost limitless control over what you can do with the OPL3 synthesizer chip.

Features of OPL Studio

OPL Studio has a long list of features. To name a bunch of them:

Integrated patch editor to edit predefined instruments and create your own
Load and save instrument banks from popular formats such as *.BNK, *.SB, *.O3, ect.

Patch linking to layer up to 4 instrument patches for even more complex sounds
Polyphonic sequence editor to create up to 32 drum and 32 melody sequences
Quad sequencer to live play up to four sequences

Composer module that lets you create complete songs from your sequences
Midi channel mixer

CLICK FOR MORE »

Overlooked Module #17: Wild Sync Fatmoog VCF / VCA

video upload by Musical Miscellany

"This is a really cool filter from Wild Sync. It emulates the classic Moog 24db/octave ladder filter but has a character switch for Bass (Minitaur) and Lead (Prodigy) variants.

Visit Wildsync's store on Etsy: https://www.etsy.com/shop/wildsyncgear

See more Overlooked Modules here:"

Overlooked Modules Playlist


Buy Me a Coffee: https://buymeacoffee.com/musicalmisce...

A $20 MIDI synthesizer based on the SAM2695 chip (#seeed #XIAO-MIDI-Synthesizer)

video upload by Floyd Steinberg

"Here's the #seeed 'XIAO MIDI' #synthesizer, a $20 box based on the #SAM2695 synth-on-a-chip and the XIAO ESP32-C3 MCU. You can get it here: https://www.seeedstudio.com/XIAO-MIDI... Table of contents:

00:00 quick sound impression
00:12 hi
00:38 hardware overview
00:57 default firmware
01:50 creating a firmware that actually supports MIDI (shoutout to @SimpleDIYElectroMusicProjects )
03:12 build a 5 pin MIDI in plug
05:23 some sounds: piano
06:20 saw wave pad
06:34 "crystal ep"
07:13 analog pad
07:27 'glass pad'
08:05 synth brass
08:23 drum kit
08:33 on NRPNs and SYSEX using @intechstudio 's GRID controllers
09:13 NRPN explained (Filter cutoff frequency control)
10:54 SYSEX explained (Reverb time control)
11:38 calculating the checksum
12:20 live tweaking demo
13:01 same, but using multiple tracks
14:25 conclusion; some feedback to SEEED

Also check out https://github.com/kinoshita-lab/MIDI... which uses the same chip but already has a MIDI capable firmware. https://www.tindie.com/products/kinos...

HÄLP ZIS CHANNEL

https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"


Features 1: Zero-Barrier Creation, Perfect for Music Beginners

With three preset modes and plug-and-play functionality, you can dive straight into music creation—no complex setup required. Built-in speaker and four tactile buttons deliver an intuitive, self-contained experience that eliminates external dependencies. Start making music from the very first note, no prior expertise needed.

Features 2: All-in-One MIDI + Metronome – Smarter, Smoother Workflow

XIAO MIDI synthesizer comes with a pre-set Metronome Mode, where you can press the buttons to change your BPM and toggle the drum track to effortlessly sync rhythms and control your entire beats with one single device. No need for extra devices or apps.

Features 3: Pro-Grade Performance for Advanced Players

Open-source hardware/software architecture supports deep customization and advanced sound design. With 64-note polyphony and 128-note capacity, unlock limitless sonic possibilities—craft your own signature sound engine, whether you're a beginner or an audio hacker.

Features 4: Ultra-Portable & Fully Hackable

Pocket-sized design (71mm × 49mm × 28.5mm) lets you capture inspiration anytime, anywhere. The 3D printed enclosure is fully open-source for you to remix and customize—not just an instrument, but your personal music canvas.

CLICK FOR MORE »

Meet Bela Gem Stereo & Multi

video upload by Bela Platform

"Get Bela Gem on Crowd Supply: https://www.crowdsupply.com/bela/bela...

The Bela Gem series comprises two boards: Bela Gem Stereo and Bela Gem Multi, both designed to transform the PocketBeagle 2 single-board computer into a powerful platform for real-time audio and sensor processing. Whether you’re an engineer, maker, educator, or researcher, these open-source systems provide the tools needed to create innovative audio projects with minimal setup and configuration.

Whether you need two or ten channels, the Bela Gem family of boards bring you flexible I/O and ultra-low latency for applications from haptic feedback to hearing aids. Due to the powerful quad-core 64-bit ARM chip on the PocketBeagle 2, advanced processing power gives you real-time digital signal processing, and all the flexibility that entails for your projects."