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."

Meet DayDreamer's Sustainable Affordable Open Source Synth 1

video upload by DayDreamer Synth

"Here's 13 minutes of messing around to show you a few sounds this synth can make."

Sorry for the shakiness.
0:06 - Little Mew
1:24 - Default
2:28 - 80s Spazz
4:18 - Percussive Stabs
6:35 - 303
7:20 - Aggro Bass
8:30 - Warp
10:00 - Monolithic

How To Tune

video upload by DayDreamer Synth

"This is an instructional video on how to tune your Synth 1. This supplements the instructions provide in the manual."



via DayDreamer

Homemade Sawtooth Polyphony Accessibility, Affordability, Sustainability. Open Source.

Features:

6 Analog VCOs (Voltage Controlled Oscillators)

6 Analog VCAs (Voltage Controlled Amplifiers)

LFSR White Noise generator

Velocity Sensitivity

Legato / Portamento / Pitch Glide

LED Note Indicators

Digital to Analog Envelope Generator

Digital to Analog LFO

Diode Ladder Low Pass VCF (Voltage Controlled Filter)

LFO Modulated VCO and VCF

Paraphony / Polyphony

Note Recycling

PT2399 Bucket Brigade Delay

Open source hardware and software

Dimensions: 40 × 16 x 7 cm

Currently priced at $299.00

via Synthtopia

Module X – A Modular Synthesizer based on Sunvox

video upload by Marco Antonio Müller Lopez

"Module X is an extremely flexible modular synthesizer with an interface that adapts to a wide range of needs. The system is powered by a Raspberry Pi, an Arduino Due, and a 192 kHz audio interface from Pisound. It uses the open-source software SunVox for sound synthesis. With SunVox, users can create any number of virtual synthesizer and effect modules, making the sonic possibilities virtually limitless."

PiPicoFX: Shimmer Reverb, Tremolo and Tech Stuff

video upload by linsoft23

"This Video covers them implementation of two new effects: Shimmer Reverb and Tremolo and various technical improvement made over the last few months.

Sources: https://github.com/StoneRose35/cortex...
Homepage: https://www.stonerose35.ch"

Note linsoft23 goes back on the site to 2008.

new, a sponge based audio oscillator

video upload by RS-Elc

"Sponge material shows an extremely large dielectric constant that changes with the amount of compression. It can be made into a wide range variable capacitor when clamped between two metal plates. Capacitors in the range of 100nF can be made with only a few cm of (cellulose based) sponge material.

This movie shows a sponge-based oscillator and a sponge-based lowpass filter as an introduction into 'Spongetronics'. Comes with oscilloscope waveforms and resulting sounds. More info on Elektor Labs."

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"