DIY eurorack modular synth | MOD2 Sample Player : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Sample player:
WAV sample player.
It is possible to save audio files up to a total of 20 seconds / 18 files.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/na31f...

Code with WAV samples included
https://www.patreon.com/posts/code-fo...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

Akai S950 SCSI Interface Design Project

video upload by Johnny Morgan Synth Dreams

"This video goes into detail on my design for the new Akai S950 SCSI board.

0:00 Intro
3:21 KiCAD layout
5:25 PCBWay
9:43 Assembly
13:17 Bracket Design
15:53 Mistakes!
17:38 Breadboarding the Fixes
18:34 Display Upgrading
20:08 V2 Boards
23:41 The Final Test

This video was sponsored by PCBWay
https://www.pcbway.com
Visit them for all you PCB prototyping needs - quick turnaround on PCB's and they offer a full selection of services, including design, board manufacture and assembly.

If you are interested in purchasing one of these boards for your AKAI S950, contact me via email for details. email: johnnymorgan808@me.com"

AYTracker by MIDI IN

video upload by MIDI IN

"I've spent a lot of hours this week on this project instead of the usual lucky dip. Here's what I've done so far using my AY tracker terminal-based software for RC2014 computers. I'm very pleased with it.

7-blade helicopter photo by Sgt. Seth Starr - DVIDS.net, Public Domain, https://commons.wikimedia.org/w/index..."

CeeS upgrade for Yamaha CS10, CS15 and CS30 Synthesizers

video upload by Tubbutec

"CeeS is an upgrade for Yamaha CS10, CS15 and CS30 synthesizers. It adds MIDI input and output as well as additional filter modulation sources."

https://tubbutec.de/cees/

CLICK FOR MORE »

Description and Demonstration of a Synthesizer Module based on the LM567 Tone Decoder Chip

video upload by ParadisoModular

"This video illustrates and demonstrates a module I recently designed based around the LM567 Tone Decoder IC. I show it in 'musical' action both as a frequency detector as well as an audio effect that transforms an input waveform with a controllable and dynamic subharmonic-prone 'crunch'."

Reco Mini Bass - Tutorial Demo

video upload by Arthur Joly

Click CC at the bottom of the player for subtitles.

Meet the M0SS 101 Synthesizer by Andrew John March

M0SS 101 DEMO video upload by Andrew March

"A quick demonstration on how to build a patch with the M0SS-101 synthesizer."

From the creator of WVR, the the M0SS 101 virtual analog monosynth is currently seeking funding on Kickstarter.

"M0SS-101 is a virtual analog monosynth built for a pure, hands-on subtractive synthesis, packed into a compact, rugged guitar pedal enclosure.

With 26 buttons and a single encoder, M0SS-101 gives you intuitive access to a deep 42-parameter virtual analog synthesis engine. Press a button to select a parameter, turn the encoder to modify it, and monitor your signal flow via the LED system.

Using a MIDI controller, you can map any parameter via simple MIDI learn, making it easy to integrate into your setup. Up to 17 presets can be saved and recalled for quick access to your favourite sounds.

The 26 RGB LEDs use colour and brightness to represent signal flow, modulation paths, settings and selections. A separate row of 11 LEDs at the bottom gives you instant visual feedback on the currently selected parameter. I aim to offer an affordable, compact, and versatile instrument, without sacrificing features, ergonomics, or most importantly, fun. I hope you'll enjoy playing this synth as much as I have :'-)"

CLICK FOR MORE »

Introducing TŒRN - A Standalone Arduino-Based Sequencer & Sampler

TŒRN - track building demo: Camping Love video upload by TŒRN

"Short demo of building a track with TOERN with the new effects firmware while camping in NL"

"TŒRN is a standalone Arduino-based sequencer & sampler — designed for fun, and live performances. Developed by Jan from SP_ctrl in Hamburg, it’s the evolution of the NI404: a groovebox with Teensy-powered synths, live recording, and a playful 16x16 RGB interface. Perfect for kids, couch producers, and live performers alike."

via https://toern.live

"Hi, I'm Jan! TŒRN is my evolution of the NI404, my first DIY sampler-sequencer prototype. As the sole developer, I've poured my heart into creating something special: a device that's both a fun toy AND a serious music tool.

My vision was simple: create an instrument that's easy to learn but deep enough to grow with you. Whether you're a kid discovering electronic music or a seasoned performer, TŒRN adapts to your style - choose your own colors for the enclosure as well! Its portable design and intuitive interface make it perfect for both: beginners and pros.

All components mounted on the PCB—no extra cables

USB-C, battery support, pro-grade audio & MIDI TRS ports
Designed for kids, couch musicians, live performers, and synth tinkerers"

CLICK FOR MORE »

ZicBOX - DIY open source modular scalable groovebox

video upload by Floyd Steinberg

"The #ZicBOX Pixel is the smallest example built in the ZicBOX ecosystem. The idea here is modular hardware meets modular software, so you can quickly scale up or down your #synthesizer and #groovebox ideas with a couple of JSON files and some 3D printed enclosures. Sponsored by #PCBWay. Table of contents:

00:12 concept
00:45 PCBWay https://pcbway.com/g/4nkLCf
01:49 parts needed / costs
02:13 building the thing
06:30 installing the software
06:56 UI overview
07:15 using the thing
11:09 conclusion, and call for papers (coders and designers)
12:10 if you find my videos useful, please consider supporting this channel (building DIY devices and learning how they work and then making a video is expensive and time consuming)

Relevant links
ZicBOX gitHub https://github.com/apiel/zicBox
Bill Of Materials https://github.com/apiel/zicBox/wiki/...
PCBWay - https://pcbway.com/g/4nkLCf - you can upload the ZIP folder from the GitHub page there; the measures are 100x84,5mm - price is $5 per board with a minimum of 5 boards per order

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

Additional designs:

MONOVOX: An Analog Synthesizer

video upload by Ian Schwarzkopf

"MONOVOX is an innovative analog synthesizer with a digital touchscreen visualizer."

Introducing Pipo Interfaces

A Sneak Peak into Pipo modules video upload by Pipo Interfaces

"Video produced by Tom Bouchet

Music: "Transition" by Alex-Productions (CC BY 3.0)"

Press release follows:


Pipo Interfaces brings a new versatile toolkit for creative sensing and audiovisual interactions in real-time.

Developed by creative technologist Rupert Renevier, Pipo is a range of electronics modules that connect sensors to computers, and are meant to simplify creative interactivity between people, real-world objects, and digital creation.

Whether you're performing, designing experimental MIDI instruments, or interested in making installations, Pipo builds the foundations of an accessible and adaptable open source toolkit.

When digital experiences become sensible and tangible, they allow for greater engagement and connection. The idea of using sensors for audiovisual applications and arts is far from being new, but still requires building custom solutions on Arduino or Raspberry Pi, which tends to be complex, time-consuming, and therefore not easily accessible to most.

Pipo wants to unlock the creative potential of real-time sensing, and lower the technical barrier to it, by proposing tools that connect the physical world to the digital in a straightforward fashion.

The Pipo recipe is simple: small affordable modules, wireless capabilities, and an intuitive yet powerful user interface. All Pipo modules can be used alone or in combination, fixed, worn on the body, embedded in objects, etc... All Pipo modules have mounting holes to augment all kind of projects and casing will be made available.

The first 3 modules of the family are Pipo Motion, Pipo Range and Pipo Analog.

Pipo Motion is dedicated to sensing movement: orientation, acceleration and magnetic field, thanks to an advanced 9 axis IMU (Inertial Measurement Unit). It allows for relative and absolute orientation.

Pipo Range is an accurate distance sensing unit which can be used to detect hands, obstacles, objects, or people (up to 3m). It can be used the same way as a theremin, or as a people proximity sensor for eg.

Finally, Pipo Analog, a versatile Input/Output device. On one side it has 8 capacitive touch inputs to create original touch buttons (for eg: with wires, metallic tape, vegetables, conductive paint, etc...)

On the other side it has multiple analog voltage inputs/outputs (up to 8). With these you can acquire and use any external buttons, specialized analog sensors modules, knobs or control servo motors, drivers, etc...

Beyond these three first sensing modules, Pipo Interfaces carries a vision for a whole creative ecosystem for many more input and also output modules. It has a strong anchor towards open source development and wants to create a strong user community connection.

Pipo modules can all send standard MIDI and/or OSC data wirelessly for maximum compatibility.

The connectivity is made through WiFi, Bluetooth Low Energy, or USB and every module has an onboard battery charger, so that whatever idea you have, you can test it quickly and have it communicate to your audiovisual software in a matter of seconds (no matter your operating system).

All the settings can be tuned in the field through a web interface hosted on every module.
No need for an app or software, just open any web browser on your mobile. This interface allows you to set various settings like sensing parameters, ranges, and to adapt the incoming and outgoing data streams to your needs, quickly and easily.

You can for example eg fine tune the midi output, choose a note scale, channel, etc...

On a technical level, the project is developed with PlatformIO and the Arduino framework to make it easy for people to hack, modify, upgrade their pipos, or build their own custom Pipos. The software is open source, and the project runs on the Esp32-s3, one of the most versatile and powerful IoT chips around.

Pipo will launch as a pre-order campaign to fund the first production run. If you like Pipo, you can support it by entering your email address on the campaign page, it means a lot ! By doing so, you will also be notified of the launch date, so that you can be among the first people to get yours.

The launch date is pending on gathering a critical mass of people who want to see the project going live, so subscribing helps the project move forward.

All this happens on CrowdSupply, a platform dedicated to launching open source projects:

https://www.crowdsupply.com/pipo-interfaces/pipo

LMZ NM3

video upload by LMZ

DIY synths by LMZ. This might be the first video on the site featuring a guy performing while holding a potted plant. A few designs follow:

CLICK FOR MORE »

Erica Synths and Moritz Klein Introduce EDU DIY FM Drum Eurorack Module

via Erica Synths

"Introducing an FM Drum circuit that fuses analog punch with metallic tones of FM synthesis. This DIY kit offers a wide range of sounds for your patches, from kicks to toms, metallic clangs and more – a great addition of versatile, rhythmic elements to your system!

We – Erica Synths and Moritz Klein – have developed a series of educational DIY kits under the brand name mki x es.EDU with one specific goal in mind: to teach people with little-to-no prior experience how to design analog synthesizer circuits from scratch. What you’ll find in the box is not simply meant to be soldered together and then disappear in your rack. Instead, we want to take you through the circuit design process step by step, explaining every choice we’ve made and how it impacts the finished module.

NB! All kits in these series are simple and come with extensive user manuals which can be downloaded separately, therefore we will not provide customer support in case your DIY build fails to function or similar."

Designing an FM Drum circuit from scratch (kick, tom, bell & cymbal)

video upload by Moritz Klein

Chapters
00:00 Intro & Sound Demo
01:46 Triangle VCO
05:56 Tri To Sine Waveshaper
07:17 VCA
11:20 Decay Envelope
12:28 Gate To Trigger Converter
14:00 VCO Reset
15:26 Pitch Envelope
18:44 Attack (Distortion & Click)
21:38 FM
25:00 XOR Pulse
27:36 High Pass
30:05 Decay CV
31:20 Tune CV
34:08 Final Demo & Outro



Build your own FM Drum as a DIY eurorack kit: https://www.ericasynths.lv/shop/diy-k...

"While trying to fix a broken TR-909, I came up with a DIY analog FM Drum circuit that combines the punchy character of the 909 with the metallic textures of FM synthesis. It comes with four different modes:

• 909-style kick/tom
• Metallic bell/gong
• Ring mod cymbal
• FM cymbal

The FM Drum is the final drum voice in my DIY drum machine series (for now). If you want to build along, here's the bill of materials:"

CLICK FOR MORE »

Theremon+ [First Look]

video upload by MoShang

"The Theremon+ is the successor to the kit-built Theremon by Groovesizer. While the original was limited to a single voice, the Theremon+ adds a second wavetable-based voice with an arpeggiator, and a drum section with various styles and 4 kits. The original was intended exclusively for the DIY market, but the plan is to sell the Theremon+ fully built. We hope to offer the Theremon+ at the same price point as the original (around US$130) - would you back it on Kickstarter? https://groovesizer.com"

The Center for Haptic Audio Interaction Research Introduces ILSE

video upload by The Center for Haptic Audio Interaction Research



via The Center for Haptic Audio Interaction Research

"Ilse the Eurorack synth voice in one DIY module is making warm but harsh Berlin Techno / Surgeon style stabs.

Ilse is an elegantly minimal, yet fully functional synthesizer voice in a compact 10 HP Eurorack module. The only thing you need to let it meow is a CV source to trigger its 1V/Oct frequency input (or a MIDI to CV converter and a MIDI sequencer) . Because it has a low part count it is ideal for Eurorack beginners or entry-level DIY projects.

Ilse is named after a cat, living in the legendary “Villa” in Weimar, Germany. The “Villa” was a place where a community lived and came together. Many underground concerts and parties took place here before the house got sold, renovated, and the mayor moved in. We created the graphics on the aluminum face-plate in her memory. Ilse (the synth) makes great acid sounds, so it was only logical to illustrate a cat tripping. Turn the knobs to make her look around or roll her eyes.

Ilse is designed to be affordable, easy to build, yet flexible, and feature rich. It is a synthesizer voice for your Eurorack, but can even be driven without a rack using two 9V batteries (not included).

Ilse is fully open source (KiCad schematic and layout is available in a git repository) and inspired by Syntherjack’s single-chip synthesizer Totoro. Check out his website with nice explanations, e.g. on the filter (we use the same filter on Ilse). We extended the design for external voltage control on filter, oscillators and LFO. Unlike Totoro, Ilse is designed around a unique oscillator design, which integrates the exponential conversion directly into the oscillator core. This results in an efficient circuitry saving you build time, parts and costs.

PCB and face-plate are manufactured in the EU. Kitting was done by our friends from Befaco in Barcelona. Complete assembly manual can be found in our forum.

Technical specifications

Functions

Two saw tooth oscillators
Bridged-T low pass filter with resonance control
Triangle LFO with speed control, and routing to filter and/or oscillators
Simple mixer and detune for oscillators
Controls

LFO Speed, Filter Modulation, Osc Modulation
Filter Cutoff, Filter Resonance
Tuning, Osc2 Detune
Osc1/Osc2 (Filter in)
Output volume
Input/Output

1V/Oct CV for oscillators (0-5V)
Gate (0-5V)
Filter cutoff (0-5V)
External filter input
Volume controlled output
LFO Speed (linear, via solder pad on back, 0-8V)
Oscillator 2 detune (linear, via solder pad on back, 0-8V)
Current draw per Eurorack rail

+12 V: 22mA
-12 V: 18mA
+5 V: NC
Dimensions

50mm wide (10HP), 128.5mm high (3U), depth in rack: 23mm, overall thickness: 43mm"

CLICK FOR MORE »

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."

Emute uSeq - Live Coding & Modular Mashup - LSPXPO 2025

video upload by sonicstate

"Emute Lab Instruments is a new project, based at the University of Sussex, and coming out of the Experimental Music Technologies Lab research group.

Nick spoke to Dimitris about their first creation, the uSeq module, which bridges live coding and modular synthesis.

Rather than relying on laptops, uSeq uses a Raspberry Pi Pico to handle code expressions, translating them into control voltage (CV) and gate signals. Its design emphasizes accessibility, featuring an open-source platform that's DIY and budget-friendly.

The module has three CV and three gate outputs, coupled with a user-friendly coding language called *ModuLisp*. This setup allows you to manage multiple code patches and switch between them using onboard controls. Aiming to move beyond traditional code interaction, Dimitris is exploring vocal control methods, aligning with live coding's evolving narrative.

Available both as a DIY kit and a ready-made module"

via Emute Lab Instruments

"uSEQ is a eurorack module that brings livecoding into your modular system. Fundamentally, it’s an extremely flexible voltage generator and processor. It has a set of CV and pulse inputs and outputs, but instead of having a fixed set of controls and functions, you can choose how voltages are generated by livecoding them. This means that you can control uSEQ’s behaviour with the vast possibilities of creative coding, using a simplified programming language specialised for music. uSEQ is great for sequencing, waveform generation, and waveform processing. You can use it as a live performance tool, or configure it for specific functions.

To use uSEQ, hook up a computer via the USB port, load up the editor in your browser and start playing."

Emute Lab Instruments - Myriad multi-oscillator - LSPXPO 2025

video upload by sonicstate

"Emute Lab Instruments is a new project, based at the University of Sussex, and coming out of the Experimental Music Technologies Lab research group.

Chris showed Nick their latest creation, Myriad a new multi-oscillator module.

This prototype featured nine oscillators organized into three banks with a hybrid analog-digital synthesis design, aimed at creating dynamic sounds. Chris explained the module's CV-controllable parameters, including pitch, spread, and octave control, designed for rich tonal diversity. An integrated wave-shaping and overdrive circuit added depth and distortion, with LEDs indicating the overdrive status.

It should be available soon through Signal Sounds and Thonk.

More Info:
https://www.emutelabinstruments.co.uk"

TM32 DOS MIDI Synth with Roland MT-32, CM-32L and General MIDI

video upload by PhilsComputerLab

"TM32 is Serdaco's latest external MIDI synthesizer! It's very compact, runs mt32-pi and great for DOS games with compatibility of Roland MT-32, Roland CM-32L and General MIDI.

Disclosure: Serdaco sent me this product for free to create a video review. I am not getting paid, but I do get to keep the product.

Use PHILSCOMPUTERLAB discount code for 5% discount on any purchase!

Buy the TM32: https://www.serdashop.com/TM32
Buy the PicoGUS: https://www.serdashop.com/PicoGUS
Buy the DB15MIDI: https://www.serdashop.com/DB15MIDI
Buy the MIDI cable 1m: https://www.serdashop.com/MIDI-Cable-1m
Buy the MIDI cable 1.5m: https://www.serdashop.com/MIDI-Cable-1.5-m

🛠 Resources 🛠
Software for SD card: https://www.serdashop.com/TM32
ROM files: https://archive.org/details/mame-versioned-roland-mt-32-and-cm-32l-rom-files
500 SoundFonts Collection: https://archive.org/details/500-soundfonts-full-gm-sets
GeneralUser GS SoundFont: https://schristiancollins.com/generaluser.php
SoftMPU: https://bjt42.github.io/softmpu/"

"TM32 is a MIDI synthesizer that supports General MIDI / GS SF2 soundfonts and optional MT32 emulation

The software is based on the open source MT32Pi, with a tweaked configuration for excellent live performance, preloaded with default GeneralUser GS soundfont.

Complete fully built and tested unit, including enclosure.

You can download the sd card files here.

TM32 is the successor to MP32L which is still available until end of stock.

Features :

High Quality Stereo DAC, 3.5mm stereo line out

Standard DIN MIDI input

Micro SD card slot for MT32Pi based software

USB-C connector for power (for 5V 2A adapter)

Uses Pi zero 2W, 512 mbyte of RAM

High quality enclosure with TM32 led glow logo, dimensions : 81mm x 75mm x 26mm , 74g

Supports SF2 soundfonts up to 400mbyte, 16 part multitimbral (all 16 midi channels)

Optional support for MT32 emulation (need to supply your own ROM files on the micro sd card)

128 voices polyphony

Low latency

Switch between soundfonts with the press of a button"

CLICK FOR MORE »

AI Synthesis Releases new Eurorack High Power Supply

video upload by AI Synthesis

Press release follows.

Portland, OR, USA March 12, 2025 – AI Synthesis has announced the Eurorack High Power Supply

The Eurorack High Power Supply is a low-noise solution for powering large, power hungry systems. The Power Supply supplies a total of 5 AMPs (5,000mA) of +12v power, 2.5 Amps (2,500mA) of -12V power, Ground, and 400mA of +5V power to your modules via 12 shrouded connectors, and multiple chain points to other distribution boards. Four LEDs indicate status of the four power rails, and the Power Brick is included. The Eurorack High Power Supply uses super quiet DC to DC converters to turn one powerful DC brick into four reliable, quiet, power rails:

+12V A: 2.5 Amps
+12V B: 2.5 Amps
-12v: 2.5 Amps
+5V: 400mA
Headers 1-6 Draw their +12V from +12VA, and Headers 7-12 draw their +12V from +12VB.

“In the year 2000, I was in college and obsessed with modular synths, but could barely afford to eat. I knew it was possible to build your own synth, but there wasn’t anyone, or anywhere to turn to for advice. In the past decade, much more information has been published online, and in 2013 I started down my path to DIY modular. Even with all of the information online, there still lacked a single, simple, comprehensive guide for those looking to build their own synthesizer. I want AI Synthesis to be that guide. Prior to building my own synth, I was a dreamer, after building my modular, I felt I had awoken. I want to help others do the same.”

-Abraham Ingle

Founder, AI Synthesis

In addition to providing step by step build instructions, schematics, and circuit explanations, the site also includes a guide for getting started in modular synthesis, and a series of DIY Guides, with information regarding how Resistors actually work, and how to integrate a $26 scope into your Eurorack system.