Prototyping a 16 step Sequencer

video upload by Labyrinth Of Spirits

"This is just a prototype demo of the sequencer I am building for my next synth project. The main goal was to have a 16 step 'step' sequencer -- allowing notes to be played in and recorded. As it went along, I implemented more things--Split, Looping, Ratchets, Accents, Gate length, and Mutes. I'd love to expand it with pages so I can do longer sequences, but for now, this is what I have. I have maxed out the boards that run this, so if I add more, I will need to either delete features, or figure out a way to expand it all to give me more.

Lately I have been really kicking around starting my own business in the realm of what I have been doing...Let me know if you are interested in that and hearing more. I have the full plan drawn out and think it is an interesting one. Maybe I will make a video testing the waters on interest and viability. We shall see.

I'm not sure if anyone even reads these descriptions, but here we are."

Shoyu Station: A Generative Ambient Fish Synth

video upload by Rarebeasts

"Shoyu Station is a generative ambient instrument I’ve built inside a 3D printed fish.

Twist the snout to pick a creature, press the button to drop it in the tank. Each creature makes its own layer of sound: whale calls, deep ocean drones, bubble melodies, slow tidal swells. Add a few and they build up and drift around each other. A small screen inside the fish shows the creatures swimming about.

It runs on an ESP32 with a small TFT screen, a pot for the snout and a single button.

What creature would you like to see in the tank? Tell me in the comments."

Ghost In Translation DS1 Eurorack Drums Module

video upload by Ghost In Translation

"The audio is recorded straight from DS1 to my output module, except for the last part where I put it in context with some effects.

I go through the 16 algorithms to showcase how DS1 sounds.

DS1 is available on https://www.ghostintranslation.com.

00:00 - Kick 1 00:48 - Kick 2 01:34 - Kick 3 02:18 - Kick 4 03:06 - Hihats 05:18 - Cowbell 06:41 - Shaker 07:49 - Cymbal 09:23 - Clap 10:43 - Tokyo Bell 11:31 - Rings 12:38 - Tom 13:47 - Gong 14:47 - FM Synth 15:22 - Acid Bass 17:08 - Dual OSC 18:53 - Select CV 19:57 - More modulation 21:25 - With effects

#eurorack #euroracktechno #eurorackmodular"

Features

16 algorithms

32-bit float DSP

MIDI TRS Type A IN and OUT

Auto calibration

Either-way power

Flippable panels

Technical Specifications

Module Width: 8 HP

Depth: 45 mm

Power Consumption: +12V 75 mA, -12V: 3.5 mA

CV Input Range: 0V to 5V

https://www.ghostintranslation.com

CROWN — DIY Generative Synth made with Teensy

video upload by PhilStudio

"A 16-minute exploration with CROWN, my homemade Teensy-based generative synthesizer, accompanied by visuals from PHOSPHOR.

🔗 Discover the Crown project: https://philstudio.blog/phil-studio-v...

No talking, no tutorial—just sound, evolving patterns, and a few turns of the knobs.

I built Crown out of a dream to create a musical companion for my guitar jams: something that could suggest ideas, explore different styles, and surprise me with just a handful of controls. Its five Crowns shape different aspects of the music, turning a few simple choices into a wide range of possibilities.

An Arduino Nano handles the knobs, displays, and controls, while a Teensy handles the sequencing, musical logic, and generation of notes and drums. The instrument is still a working prototype, evolving with each experiment.

The visuals come from PHOSPHOR, an audio-reactive app I created specifically for this purpose.

🌐 Explore more inventions, music, and experiments:
https://philstudio.blog"


Crown Synth

An experimental generative synthesizer that creates melodies, rhythms and textures for spontaneous musical exploration.

Overview

I created Crown out of a dream to build a musical companion for my guitar jams—something I could switch on, explore, and play along with. I wanted to make creating music feel intuitive, with just a few controls to shape the sound and discover different musical styles without getting lost in menus or endless settings. That idea became the five Crowns: five distinct musical personalities, each offering a different starting point for improvisation. Crown brings fresh ideas and unexpected turns to a jam, leaving me free to pick up my guitar and follow wherever the music leads.

The Build

Crown is built around two microcontrollers: an Arduino Nano handles the user interface—knobs, displays, controls, and parameter selection—while a Teensy handles the sequencing, musical logic, and generation of notes and drums. This lets the Teensy focus on making music while the Nano keeps everything hands-on and accessible. A future Sampler Extension, based on the Tsunami Super WAV Trigger, will expand Crown’s sound palette with sampled instruments, atmospheric layers, and other recorded sounds.

The Philosophy and why Crown?

I think of the five Crowns as the guiding forces behind the music. Each one is an abstract control that shapes a whole set of musical decisions, letting me explore different styles and moods with just a few gestures. The name comes from that idea of influence: each Crown rules over part of the musical world, and together they give it its character. My goal was to make something I could play by feel, letting a few meaningful choices open the door to unexpected music.

Dreadbox Introuces ALECTO. Analog Percussion Synthesizer

video upload by Dreadbox

"Discover ALECTO, a dual-voice analog drum synthesizer built for bold sound design, evolving polymetric rhythms, and endless sonic exploration.

00:00 – Voices | Shape your analog sound
01:55 – Sequencer | Create ever-shifting rhythms
02:53 – Patchbay | Connect, modulate, experiment
03:58 – Jam | Hear ALECTO in action"

Explaining and testing Alecto by Dreadbox

video upload by Stazma and Dreadbox

Dreadbox Alecto Drum Machine

video upload by Starsky Carr

Alecto: A Drum Synth from Dreadbox

video upload by Stephen McLeod

0:00 Intro 0:39 Assembly 1:49 Sounds 3:43 Modular Integration 5:58 Thoughts

"Alecto is a dual-voice analog drum synthesizer combining powerful sound design with polymetric sequencing. Each voice features two oscillators, a noise source, dual filters, and two envelope generators, delivering everything from punchy percussion and deep bass to evolving sonic textures.

Two independent trigger sequencers create complex, ever-shifting rhythmic patterns, while the versatile patchbay and Eurorack compatibility open up endless possibilities for sonic exploration, whether as a standalone instrument or part of a modular system."

DIY Polyphonic Desktop Analog Synthesizer Demo

video upload by Chris Synths

"Hi all! This is a (no-talking) demo of a DIY 6-voice desktop analog synthesizer I have been working on.

The hardware of each voice features two SSI 2131 VCOs, an SSI 2144 filter, a high pass filter, a wave folder, and ring mod.

All voice circuitry was made with SSI chips, op-amps, OTAs, and discrete components.

There is one effect, an 8-stage analog phaser.

There is an ST microcontroller for MIDI, voice control, display driving, front panel scanning, etc. Control voltages are produced by a DAC80501, as well as by the ST."

DIY Eurorack Modules: Tin Man Synths - Music China 2026

video upload by sonicstate

"We spoke to Andrew from Tin Man Synths about his range of DIY Eurorack Modules, a set of simple through-hole designs built around accessible analogue and digital circuits.

The context was China's DIY synth scene, where importing synth brands and beginner kits can be difficult or expensive. Tin Man Synths focuses partly on making local DIY resources more available, alongside carrying other brands.

The range includes a transposing sequencer, which allows one sequence to transpose another, and clocking the two parts out of sync creates a longer rolling pattern of 32 to 64 steps. Other modules include dual attack-release envelopes, a side-chain VCA, matrix mixer, output stages, a semitone voltage-offset processor, the Radius 2164-based filter, voltage-controlled slew, a 40106 VCO, a voltage-controlled LFO, and Daisy Seed-based delay and granular effects.

The modules use through-hole construction, with bare PCBs around $10 and full kits around 400–500 RMB, or roughly $50–60.

Availability is currently mainly China and Southeast Asia."

ACID FREQ synth

video upload by e j

"9V DIY ACID SYNTH! 🧪🎛️

A little box of squelchy, unpredictable acid goodness, perfect for synth DIY workshops, electronic music enthusiasts, and curious sonic explorers!

Features:

PLL-based VCO (square wave)
Squeaky, squelchy VCF
Random shift-register-based CV sequencer
Built-in VCA

Controls:

Frequency and glide
Filter cutoff and resonance
VCA control (modulated or fully open)

All powered by a humble 9V battery, ready to unleash some wonderfully weird sonic adventures.

Twist the knobs, push the resonance, embrace the randomness...

ACIIIIIIIIID! 🧪🔊"

Can you build a playable synthesizer in a single afternoon?

video upload by Illegal State Of Mind

"Can you build a playable synthesizer in a single afternoon? Here's my attempt: a DIY synth built from a basic ESP32 I had lying around.

At its heart is a DCO: a digitally controlled oscillator. The waveform isn't generated in code. It comes straight from the PWM outputs, while the code only sets the pitch, pulse width and modulation. The result is a fat, raw, monophonic sound with accurate notes and no tuning headaches.

How this ESP32 synth works:
• Two PWM signals from GPIO 18 and 19
• A simple resistor mixer and a capacitor on the output
• MIDI input built around a 6N137 optocoupler, three resistors and a socket (powered from the ESP32 board)
• Pitch Bend and Modulation over MIDI
• Pulse width and detune of the second oscillator controlled by knobs

What this synthesizer doesn't have (yet): an envelope, polyphony and a filter. They can all be added later in the analog part of the signal path, and I'll start working on them soon."

Is Behringer Responding to the FM-1 Revolution?

video upload by PhilipsKnobs

"behringer has put the KICK source code on github, and it got me wondering if the FM-1 has helped kick off something bigger in the synth world.

in this video, i take a look at what they've actually released and why i think it's interesting. is open-source software the future of music hardware, or am i reading too much into it?

obviously, we don't know if this has anything to do with the FM-1, but i'd love to hear what you think.

github: https://github.com/MusicTribeOpenSour..."

Behringer's Open Source Synth will Change Everything | THAT SYNTH SHOW

video upload by SYNTH SAMURAI

UGLY MPC by Behringer…does anyone want this?

video upload by SON WU

"A NEW and UGLY MPC, but not made by AKAI! It seems like Behringer has the first prototype of their MPC One clone ready and is asking for your help to bring it to life by open-sourcing the firmware. What do you think about this sampler? And how long will it take until they actually release it?"

"Behringer KICK (BE 0700-AAM)

Source code for the Behringer KICK.

Key features

AI camera for gesture control
Touchscreen
16 RGB pads, 8 banks
Sampler with sample editing, step sequencer and looper
Over 300 built-in effects
4 assignable knobs and a jog wheel
MIDI in/out, USB and 4 CV / Gate jacks"

CLICK FOR MORE »

Erica Synths LXR-02 Firmware is Now Open Source

via Erica Synths

"The LXR-02 drum machine firmware is now open source and available on the Erica Synths GitHub! We live in an era of "vibe hacking", where Al-assisted tools let musicians and developers alike reshape software in ways that were hard to imagine only a few months ago. With that in mind, we have decided to open the LXR-02 firmware to the community. We are curious to see what new ideas, features and approaches emerge, and where this experiment will take the instrument. We invite you to explore the code, experiment with it, and share your results with the community."

Expander for the M-Vave FM-1: firmware switching, song library, MIDI out & sync (demo)

video upload by Oficina de Sonido

00:00 Intro
00:27 Firmware install
03:12 Song library & live sets
05:16 MIDI out: sequencing a MicroFreak
07:39 Sync out: FM-1 as master
09:28 Sync in: Clave as master
10:29 Wrap-up

You can find the M-VAVE FM-1 on Amazon.


"The Expander is a small companion box for the M-Vave FM-1, by Oficina de Sonido. It plugs into the FM-1's USB port and adds what the FM-1 can't do on its own:

▸ Install and switch firmwares (SLOOP, X0X, CTL-1, stock…) with no computer, from its microSD card

▸ Song library: back up and reload songs on firmwares that support it. Switching firmware no longer costs you your work, and you can play a whole set live without a laptop

▸ Two TRS MIDI outputs: sequence other synths from the FM-1, with MIDI channel filtering for devices that receive on all channels

▸ Sync in and sync out: the FM-1 can lead or follow Volcas, Pocket Operators, modular synths and drum machines

In this demo: firmware install, loading songs, sequencing a MicroFreak, and syncing both ways with Clave, the Euclidean drum machine by Oficina de Sonido.

What you see is a prototype, user interface included: we're already working on the PCB, the front panel, the enclosure design and the UI.

It will be open source: schematics, PCB and firmware will be published once it's finished.

More info: https://www.oficinadesonido.org/expan...

Built on the great work of the developers of SLOOP, Felucca, X0X and CTL-1. Thank you!"

Hop Tactile - touch and play- Brooklyn SPEXPO 26

video upload by sonicstate

"Saima from Hop gave us a look at Tactile, an open-source standalone synth from Hop, developed from work in classrooms at Daniel's Music Foundation, a nonprofit working with disabled musicians.

Tactile is wireless, includes its own speaker and comes in light and dark colourways. The playing surface is pressure sensitive and has nine zones. The edges play a major scale, while the centre acts as a random sequencer. Additional areas control half-step bend, octave bend and a single-stage looper.

Patch changes use physical texture pads, with each pad linking a tactile surface to a matching sound character, including smoother and more bit-crushed responses. Key cards transpose the instrument; it defaults to A and changes key when a card is inserted.

Tactile is available from Hop's website. A separate Tactile Sidekick is in prototype and adds CV and MIDI interfacing for Eurorack and controller use.

More Info: https://hop-sounds.com"

Recusion DEMO

video upload by Arthur Joly

OPEN-1 Concept

video upload by RedtailWorks

"OPEN-1: one synth, every firmware.

OPEN-1 is an idea for an open, entry-level synth: a 37-key instrument that becomes a new machine every time you pick a firmware from the SD card. In this concept video it runs a simulated HYP-1, in time with a real HYP-1 live take.

IDEAS PHASE: OPEN-1 is not a product yet. Nothing is for sale, the renders are concept art, and every spec and price below is a target, not a promise. I'm sharing it early to find out what you'd want from it.

TARGET SPECS
480 MHz Cortex-M7 (STM32H750), open toolchain (the FM-1 runs at 240 MHz)
32 MB of working memory for long delays, loops and samples (the FM-1 has about 432 KB)
16 MB of firmware flash plus a microSD library: keep several firmwares installed, swap from the menu
24-bit stereo audio in AND out, so it can be an effects box too
MIDI in and out (3.5 mm TRS), USB-C device and USB-C host
37 RGB-lit silicone keys, 8 velocity pads, 8 endless encoders, a thumbstick and 2 spring levers
4" 480×320 IPS screen, built-in speaker, headphone out, 3000 mAh battery
Wired only, no Bluetooth: lower latency, simpler to build
Target price: under $200

OPEN BY DESIGN
An open SDK and a browser emulator, so developers can build firmware before the hardware ships
A firmware jam before launch, with a community-voted firmware pack preloaded on every unit
Launch firmware ported from the FM-1 family: HYP-1, LOF-1, ECO-1 and GRAV-1

CLICK FOR MORE »

TyCoon Sequencer Part 1: Teach In

video upload by TheAnalogmonster

"First video of my newest development, an Oberheim Two Voice Pro Sequencer inspired MIDI and CV sequencer for my TyCoon system. Smartass I am I added improvements and additional features:

• The sequencer manages several sequences in parallel, limited by the EEPROM size only.

• There is no sequence maximum length. The sequence lengths are limited by EEPROM size only.

• The sequencer operates with two different sequence types: Voltage sequences and MIDI sequences. Voltage steps are created via CV / NOTE potentiometer and STEP STORE trigger, MIDI steps via TEACH IN. The last records a MIDI sequence from an external source (other MIDI sequencer, keyboard etc.).

The steps are defined as voltage step or MIDI step by a corresponding step attribute bit.

The sequences are defined as voltage sequence or MIDI sequence by the corresponding attribute bit if its first steps.

• All sequence(r) data are kept in EEPROM automatically."

Kraftor Performer: custom MIDI control with SpeakJet

video upload by Polaxis

"A custom MIDI controller driving Kraftor with a SpeakJet voice board.

This is one example of the Kraftor Performer approach: complete instruments and custom controllers designed together around your way of playing. Controls can be integrated into the instrument or housed separately and connected through 3.5 mm TRS MIDI Type B.

Custom builds:
https://www.polaxis.be/product/krafto...

Kraftor:
https://www.polaxis.be/product/kraftor/

SpeakJet firmware and information:
https://www.polaxis.be/kraftor-speakj...

#SpeakJet #Kraftor #Polaxis"

"Kraftor Performer is a family of custom speech instruments and MIDI controllers developed with each customer for performance, installations and experimental sound. The voice engine, controls, display, connections and enclosure are chosen for your project.

Choose an integrated instrument or a separate controller connected to Kraftor through 3.5 mm TRS MIDI Type B. The photographs show example builds; your instrument can take a different form.

Built to order. Price on request.
Pricing and lead time are agreed once the design and scope are defined."

Additional designed pictured below.

CLICK FOR MORE »

He built a synth - Introducing the Lab 60

video upload by Labyrinth Of Spirits

"I have been working on this for a while and it is finally, mostly, done. I might add an effects circuit into it and swap the guitar stomp pedal switch out to a softer latching switch...but we shall see.

This is a modified Tsynth, built inside of a Casio CT-670, with a Juno Chorus clone added for good measure.

Resources worth checking out: https://github.com/gligli/juno-chorus... -- especially the issues page

https://groupdiy.com/ -- this is a great forum (Huge thank you to DMP, c1184701, and Midphase for all their insight and help)

https://www.tindie.com/products/elect..."

Synthesizers.com Introduces Q108 Amplifier DIY KIT

"We're so excited to share with you the new Q108 Amplifier DIY KIT!!

The Q108 Voltage Controlled Amplifier is a staple of any synthesizer system.

The amplitude of any waveform can be controlled by another signal such as an envelope generator, sequencer, oscillator, etc.

An Initial Gain control allows manual adjustment of the amplitude and a Level Control determines the impact of the control signal.

Both Linear and Exponential responses are available to simulate a variety of real-world sounds. Positive and negative output signal polarities are provided.

Two inputs are provided for mixing."

You can find posts featuring the Synthesizers.com Q108 here.

Open Source Programmable Guitar Pedal using STM32

video upload by GuitarML

"Project Link: https://github.com/GuitarML/GuitarPed...
Walkthough of my custom STM32 based digital guitar pedal. I give an overview of the features, and then dive into the project hardware and software. I also show a demo of the included Reverb/Delay.

00:00 - Pedal Features
4:25 - Open Source Project Overview
5:58 - KiCad Schematic
10:35 - KiCad PCB layout
16:55 - STM32CubeIDE and code
23:05 - Reverb/Delay Effect Demo

Patreon:
/ guitarml"