?Gitaar & ?TR606 & RC500

video upload by Gijs Gieskes

https://gieskes.nl/instruments/?file=...
https://gieskes.nl/instruments/?file=...

00:00 ..
02:17 The cassette player
02:34 ..
04:34 Drums and Guitar with distortion
07:03 I gave you my song

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Oberheim Matrix 1000 Clone Test (Voice 2 issue)

video upload by Martin Jan Köhler

synthiota CircuitPython Drone Synthesizer Demonstration

video upload by ReLiC

"Full demonstration of the synthiota Drone. 8 Oscillators, 3 LFOs, effects, and more!

Hardware: https://github.com/todbot/synthiota
Software: https://github.com/relic-se/CircuitPy...
CircuitPython: https://circuitpython.org/

Libraries:
https://circuitpython-synthvoice.read...
https://circuitpython-synthiota.readt...
https://circuitpython-waveform.readth..."

Also see "tbish" update on "synthiota" board

CircuitPython Drone Synthesizer Demo on synthiota

video upload by ReLiC

"8-voice drone synthesizer written in CircuitPython for the Synthiota."

Software: https://github.com/relic-se/CircuitPy...
Hardware: https://github.com/todbot/synthiota

KOSMOS – A Generative MIDI Sequencer for RP2040 (DIY Project)

You might recall KOSMOS from previous posts here. Plantssystem aka GreyScale wrote in to let us know the source code has been released. Details and link to the github repository follow.

"KOSMOS is a compact, self‑contained generative MIDI sequencer built on the Raspberry Pi Pico (RP2040).

Power it on, and it immediately begins producing evolving melodic patterns — no DAW, no clock source, no setup.

The project combines a Euclidean rhythm engine, Japanese‑mode melodic generation (Hirajoshi / Insen / Miyakobushi),
and a 240×240 LCD UI for real‑time visualization of steps, probabilities, and phrase movement.

A small instrument with a surprisingly expressive voice.

---

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Groovesizer MYNAH - Teaser

video upload by MoShang

"The MYNAH is a compact, DIY sampler that lets you record, chop, and perform your sounds anywhere.

Mynah is a compact, 6-voice polyphonic sampler you build yourself, powered by an ESP32 microcontroller and designed for musicians and sound explorers who want a truly tactile creative tool. Behind its approachable looks, Mynah hides a deep feature set including a 16-step sequencer, real-time and momentary effects like delay, reverb, filter, stutter, gate, and bit crusher. Mynah features dual audio inputs for recording from a microphone or line-in source. Samples are stored on SD card and loaded into RAM, giving you up to 16 samples per song and over two minutes of total sample capacity. Whether you’re programming beats, shaping textures, or performing live, Mynah puts serious sampling power in the palm of your hand.

Mynah‘s 16-bit, 32kHz ADPCM audio engine delivers the crunchy, characterful sound of classic samplers, while a companion web-based tool keeps your workflow modern and efficient. Manage your samples and songs, and export high-quality stems — all from your browser."

You can find more info at https://groovesizer.com/

MOD3 × Ferrofluid | DIY eurorack modular synth Actuator Driver

video upload by HAGIWO

"MOD3 is an open-source, multi-purpose actuator driver.
I use MOD3 to drive an electromagnet to control ferrofluid.
It is synchronized with the kick trigger signal.

working documents
https://note.com/solder_state/n/n160f...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod3-ge..."

Michigan Synth Works Introduces LRB-303 - a DIY TB-303 in Blue or Silver

via Michigan Synth Works

"This a complete kit to build the LRB-303 synthesizer.

This kit includes:

SMD populated LRB-303 Mainboard
SMD populated LRB-303 Switchboard
Alps Tact switches, LEDS, Standoffs
Switched DIN Socket
Mainboard Through hole parts (8 Pots, 2 Brackets, Slide Switch, Audio, DC, CV Jacks)
Precut and Tinned Ribbon Cables (4 Pcs)
Alps Rotary Switches
Precut interconnect wires
OS-303 Processor with MIDI harness
Dust Covers (4 pcs)
NOT Included:

Knob Set
Case Kit (available separately)
More details soon!

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Introducing Luna: A Lunetta style groovebox & eurorack synth module

video upload by mylarmelodies

Check with dealers on the right on pricing and availability.

"This is your official introduction to the Neutral Labs Luna - a new lunetta-style “groovebox” desktop & eurorack compatible synth. It’s patch programmable, letting you both create tones and rhythms from 5 oscillators (2 with step sequencers inside), logic and pattern generators, all at the same time. Three 'LPG's take the raw tones and let you gate and filter them. 13 effects in 2 blocks effect and shape sounds further.

Enormous thanks to Martin at Neutral Labs for commissioning me to make a vid of this. The world needs more shift registers. Note: I used my own red Tiptop Audio Stackcables in the video, but the desktop module comes with 12 braided patch cables."

Neutral Labs Luna – the first serious Lunetta synthesizer

video upload by nyppy

"Available as a DIY kit or assembled desktop synth or 42 HP Eurorack module.

Video by the amazing ‪ / ginko.ltd

#synthesizer #eurorack #diy"

Update:

What's a Lunetta synthesizer and why should you care? // LUNA from Neutral Labs

video upload by DivKid

"Join us for an exploration of what Lunetta Synthesizers are, what the new Luna from Neutral Labs is and why you should care.

The short answer is that it’s an interesting series of raw digital building blocks from a sonic sculptor (Stanley Lunetta) with lots of modern quality of life features that allow you to approach timbre as rhythm, rhythm as timbre then round that out with low pass gates and FX.

More info at https://neutral-labs.com"

*TIMING INDEX // CHAPTERS*

INTRO
00:00 Hello & previews
02:13 What is a Lunetta synthesizer?
02:54 What is Luna?
04:07 Luna feature run down
06:14 How this video is a bit different

PATCHES & SOUNDS
07:05 Comb filter drones for dark industrial soundtracks
07:55 Hypnotic drones & dual oscillator lead lines
11:20 Bouncing bass & low end swells
11:55 New rhythms from AND & XOR logic
16:05 Fireside crackles & sputtering motorbike engines
16:35 Characterful lo fi LPGs & FX for modular synth voices
19:04 Ambient gritty echoes for happy synth blips
19:29 Shift register rhythms - gate delayed musical canons for your rhythms
23:25 Metallic bass hits & interactive rhythms
23:56 Modulation ‘hooks’ from binary counter clock dividing
26:39 Experimental expressive noise wrangling
27:05 Binary counter sub octaves & external modulation of filter FX
29:12 Alien critters clashing into ambient space
29:48 Monstrous sounds from multiplexing
33:13 Metallic synthesis & bell like tones & swells
33:49 Metallic synthesis for cymbals + dynamic LPG modulation



"Logic, Unbound. Meet Luna. The first serious Lunetta synthesizer.

Look beyond clean waveforms and predictable polyphony. Luna will take you back to a time when digital didn’t mean perfect. It meant raw. Inspired by the subterranean DIY culture of the 70s and 80s, Luna is a love letter to the Lunetta machines of old: Living, breathing organisms built from CMOS logic chips. But where those machines were fragile experiments, Luna is a weaponized instrument of sonic confusion.

The Nervous System Exposed. True to the Neutral Labs philosophy, we don’t believe in hiding the magic behind an opaque face plate. Luna features exposed CMOS inputs and outputs right on the front panel. You're not just patching cables, you are rewiring the brain of the synthesizer itself. Combine signals, bend logic, and physically intervene in the computation to create sounds that shouldn't exist.

Rhythm is Timbre. Timbre is Rhythm. In the world of Luna, there is no difference between a sequencer and an oscillator. The same digital pulse that drives a bass line can be accelerated into a screeching lead or folded into a metallic drone.

5 oscillators provide the raw material. A chaotic array of logic blocks (XOR, NOT, AND, shift registers, counters, multiplexer) will chew up those signals and spit out complex, evolving mathematical noise.

Taming the Digital Mess. Raw logic can be harsh. To turn this binary chaos into music, Luna feeds its digital soul through 3 organic low-pass gates. These analog circuits impart a natural decay and percussive punch to the madness, transforming mathematical errors into bongos, plucks, and thumping basslines.

Drench it in Atmosphere. Once you’ve constructed your signal, destroy it again. Luna comes equipped with a suite of effects — distortion, delay, reverb, chorus, bitcrusher, phaser and more — to smear your logic into a wash of ambient bliss or gritty industrial texture.

5 oscillators
logic gates (2 XOR, 2 NOT, 2 AND)
5 logic blocks (5-step ring counter,4-bit binary counter, 2 shift registers, 4-channel multiplexer)
3 touchpads that generate logic signals
3 channels for audio manipulation (low-pass gates with adjustable decay and switchable trigger mode, gain, tilt EQ)
13 audio effects that can be freely assigned to 2 effect slots running in series (drive, delay, reverb, 6 filter types, bitcrusher, phaser, chorus, comb filter)
CV control for effects and 2 oscillators
MIDI control over 2 oscillators, all 3 low-pass gates, and 3 logic outputs (MIDI TRS A socket)
2 sequencers with up to 64 steps, syncable to clock or MIDI
audio output is headphone compatible
available as a desktop synth or 42 HP Eurorack module (desktop version comes with a 12-pack of black/gold braided patch cables)
See more videos and photos on Instagram.

Note: For sustainability reasons, the desktop version does not come with a USB power supply, just a USB-A to USB-C cable. You will need a 5V supply, such as a phone charger, power bank or laptop.

Note: The desktop version has a Eurorack power header and can be placed into a Eurorack. The desktop case however has 5V USB power and no Eurorack rails, you cannot use it as a 42 HP rack without modifications."

First 8-Voice Jupiter 8 Clone – Sound Demo (No Talking)

video upload by ACME SYNTHWORKS

"This is the world’s first fully 8-voice Roland JP8 clone.

Eight discrete voices.
Original voice architecture.
14 Bit Interface Board.
The circuit follows the original Jupiter-8 design.
All functions of the original instrument are supported.

The envelopes are implemented in analog form using different ICs, while preserving the original behavior.

The filter section uses IR3109 and BA662.

A large portion of the circuitry has been implemented in SMD to simplify assembly and improve manufacturability.
This video contains raw sound examples only.
Direct audio recording.
Only a subtle external delay was added."

Mudras Standalone Synth Prototype

video upload by IC Alchemy

"Mudras Standalone Synth Prototype
Uses the same LIDAR technology from the Mudras Eurorack module to control all parameters in a 4 voice standalone synthesizer.
Still very much in the experimental stage, but it works, and everything will be open source.
Also features our own custom magnetic encoder when you don't want to use the LIDAR.
LIDAR + Magnetic encoder = Something New?"

Mudras Eurorack Playlist


currently available at icalchemy.com

Playlist:

1. New Way to Sequence Eurorack Control Voltages
2. Mudras Eurorack Gesture Sequencer Demonstration
3. Quick Start Mudras Eurorack Gesture Sequencer
4. Live Looping Eurorack with Mudras Gesture Sequencer
5. Major Scale on an early Mudras protype
6. Using our Mudras Eurorack Module Live #eurorack
7.

Marcus Dunn aka lonesoulsurfer DIY Modules

video uploads by Marcus Dunn

Playlist:

1. 7 Channel Mixer For My Modular Synth.
2. Medusa - Sound Effects for Modular Synths
3. Buffered Multi for Modular Synths. Powered by Arduino
4. Digital Delay Module - Powered by Arduino
5. Bleep - Modular Drum Synth - powered by Arduino
6. Solar - A Modular Synth, Powered by Arduino
7. Groove Box Modular Synth - Arduino Nano
8. Freaq FM Synth. My Take on the Awesome MeeBleeps Synth
9. Mutant Generative Synth - Powered by Arduino

Additional details on each:

CLICK FOR MORE »

"tbish" update on "synthiota" board, jam starting at 1:20

video upload by todbot

"Start at 1:20 for a little fun jam.
Got some time to work on "tbish" TB-303 emulator in CircuitPython.
This video shows some of the updates.
The updates include:
new mapped_pot_controller to allow the pots to have different modes
sequencer has separate lane for slides so that accent & slide can happen on same step
tbish_synth now has 4 different waveforms to choose from
can edit the sequence steps, both notes and accents/slides/mutes
can switch between sequences
can adjust bpm & steps_per_beat
actually using the LEDs

code and schematics: https://github.com/todbot/synthiota

#tb303 #circuitpython #raspberrypipico"

previously:

"tbish" almost on "synthiota" board

video upload by todbot

An eyebrow-raising MIDI controller for $35

video upload by Floyd Steinberg

"Mediapipe + OpenCV caused a big stir some 4 years ago, but I never got around trying it myself. Until today, and of course I'm sharing my results with you. This Open Source software can detect gestures, poses and facial expressions and transform them to so called landmarks that can easily be used for all kinds of shenanigans (in this example: controlling your synths).

00:00 introduction: what's this?
00:38 demo 01: playing chords + bass + controlling filters
01:32 hardware needed
02:12 installation
02:56 what are OpenCV and Mediapipe?
03:55 this example explained: reading landmarks, converting to MIDI
06:35 demo 02: controlling an arpeggiator
07:37 demo 03: controlling filter cutoff frequency and pitch bend with my eyebrows
09:21 demo 04: playing pads on Akai MPC Live 3 with backing track
10:10 conclusion / do the YouTube thing!"

Where to get the stuff: [affiliate links]
Mini camera: Amazon DE | Amazon US
RasPi Zero 2: Amazon DE | Amazon US
SD card: Amazon DE | Amazon US

Installation instructions

sudo apt update
sudo apt upgrade
pip install mediapipe opencv-python --break-system-packages
git clone https://github.com/mrfloydst/eyebrowr...

then python3 ./hand.py or python3 ./eyebrow.py

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

GreyScale – A Standalone MIDI Sequencer KOSMOS Powered by Raspberry Pi Pico (RP2040)

This one is in via GreyScale aka plantssystem whose videos you have likely seen on the site.

"GreyScale is a compact, self‑contained MIDI sequencer built entirely around the Raspberry Pi Pico (RP2040).

Its minimal hardware footprint hides a surprisingly deep generative engine, combining Euclidean rhythm generation, step sequencing, probability control, and evolving melodic behavior.

The clean GreyScale UI provides immediate visual feedback — step activity, Euclid parameters, probability states — all rendered on a crisp LCD. A joystick and four dedicated buttons offer fast, tactile control, keeping the workflow musical and instrument‑like rather than menu‑driven.

GreyScale runs completely standalone with standard MIDI output, making it an ideal partner for hardware synths, desktop modules, or DAW setups.

Designed for spontaneity and long‑form generative performance, it encourages exploration and rewards experimentation. A small instrument with a refined feel, GreyScale blends DIY charm with a polished, modern sequencing experience."

Update: demo here.

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Yuyo cmos synth - First try Attiny85 dco with analog cmos shaping and twin t filter

video upload by JIANT

"everything is from the synth to the zoom recorder, twin t drums, xor snare, pt2399, and cmos stuff.

attiny85 reseting the phase of 40106 oscilators, the digital control accepts 1voct from keysetp and go to the 40106 inputs through resistors, a little rc for filtering the pwm, and for this reason when you change the oscillator frequency you can get intervals and crazy stuff. is not orthodox but suits my need for Rich timbres. the dco goes to 40106 buffers , and then 4040 dividers, twin t filters, one for each of the two voices, one goes to env, vca, filter, delay, and the other one to clock divider and filter, to get the sub osc.

firmware super simple only for checking the conversion from filtered frecuency of the attiny85 to my 40106 non exponencial vcos.
currently is tracking 10 octaves really good, the trick is put a voltage divider in the cv in of the attiny because keystep has 0 to 10v and the attiny accepts 0 to 5v tehn the tracking inside the attiny converts o.5v oct to 1 volt oct. i dont know anything about coding but i made it with chat gpt and my design . source code will be in the coments ."

Previous videos:

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8 Track MIDI Sequencer on Adafruit PyGamer

video upload by ugufru

"This is a short demo of an eight track MIDI sequencer that I created on the Adafruit PyGamer."

via Adafruit

"What fits in your pocket, is fully Open Source, and can run CircuitPython, MakeCode Arcade or Arduino games you write yourself? That's right, it's the Adafruit PyGamer! We wanted to make an entry-level gaming handheld for DIY gaming, and maybe a little retro-emulation. It's not the fastest and best of everything but it is an all-in-one dev board with a lot of possibilities!

The PyGamer is powered by our favorite chip, the ATSAMD51, with 512KB of flash and 192KB of RAM. We add 8 MB of QSPI flash for file storage, handy for images, fonts, sounds, or game assets."

Building the ReZyklus - Vangelis' Zyklus MPS1 Clone

This one is in via Jeroen of https://zyklus-mps.com/

"A while ago a group of enthausiasts set out to create a clone of the Zyklus MPS-1 that was made famous by Vangelis for its use on Direct (this was also the inspiration for the actual 'Direct' system he used until ca 1994). The original creators of this machine, Pete Kellock and Bill Marshall graciously allowed us to use the schematics and software to create this clone and have given us their permission to set it free for everyone who wants to make their own. So here goes:

In this GIT repo is everything you need to create your own machine. You will have to source your own parts, but there is a list for that. The parts are basic components, nothing custom, but some items may become slightly rare (like small EPROMs).

Its basically just a Z80 based computer.
There are also files to have the circuit boards and panels created (we used jlcpcb for that), and some 3d printing files for various panel work. A lot of the buttons etc you can get cheaply from Aliexpress and the like. Bin files for the EPROMs are also avialable. I've been also given permission to open source the actual source code, and I will do that too, at some point, but I'm still working on a few small issues before I can do that.

https://github.com/jeroenhn/zykl

There is a discord server you can join where you can chat with other builders.

The clone as we made it, is a dedicated to the memory of Vangelis and it's noted as such on the main circuit board."

See this previous post for a Demo tape on the original Zyklus. See the Zyklus label at the bottom of this post for additional posts including a documentary with Vangelis.

Pictured: Paul's white ReZyklus in the making.

Original grey Zyklus below from this post. Only 40 were made.

Drone Scope by Tim Kaiser

video upload by Tim Kaiser

Craig Barnes Jupiter 8 editor/assigner

video upload by Craig Barnes

"Building a cheap Jupiter 8 from two JP-08 modules I rarely use. I've tried to emulate as much of the original Jupiter 8 onto the front panel, although I've made some concessions because of the way the JP-08 is controlled over MIDI."

Automatique LFO Synth

video upload by Tim Kaiser