Novation Circuit Tracks Firmware Hack

It finally happened! Circuit Tracks Hacked! video upload by Guinan

"Thread is here,
/ circuithacks_is_out_now_unofficial_custom

Official Github,
https://github.com/Ghillermo/CIRCUITS..."

via Redit:

"NEW UPDATE: Beta1 is finishing internal testing and will be released soon. You can update with the upload tool. Thanks everybody for their input. I tried to include most of your requests (and some of my own) when it was possible, some of them I did my own take, trying to satisfy similar goals into a single approach. Now we have a couple new effects, you can save synth engine's patches, customize your macro Knobs from the device, pattern link, scene repeat, copy and re-arrange stuff inside or between packs... Check GitHub for a full list. All stock functions remain the same. Message me, submit a request on the GitHub or reply to this thread for fixes, new features or clarifications. A demo will maybe come, after a rest. If anyone wants to share theirs, be my guest."

Features for the archives, via Github:

CLICK FOR MORE »

Fluyt - Felucca synth engines for Korg drumlogue & microKORG2

And via Regroove | RGRV on reddit:

"This is generated code, but mostly with my own code as reference (such as examples, build infra).

Don't want the FM-1 to have all the fun by themselves. Let's join them ..."

via https://rgrvdotnl.itch.io/fluyt-logue

"Fluyt - Felucca's engines for logue

Felucca is an open firmware for the M-VAVE FM-1, a small synthesizer built around a JieLi pi32v2 DSP. Its sound engines are plain integer C, self-contained, and each one is a different way of 'whistling'. Fluyt takes nine of them and ships each as its own KORG drumlogue or KORG microKORG2 unit.

This is based on Felucca and associated FM-1 firmware which is mostly AI-assisted code. Personal examples, units, and build-infra code were used to create these units.

Why Fluyt?
The name is symbolic, as fluyt is a kind of Dutch vessel, mostly used for trade during the 16th century. Just like in the old days, I hope this 'trading' will happen between the communities. And, the word also means whistle."

Side note: Felucca is by Hügelton Instruments. You can find additional posts mentioning Felucca here.

3rd Party Unofficial Sequential Prophet‑5 / Prophet‑10 Rev4 Firmware Mods

via GitHub

prophet-rev4-mods

version 2.3.0

An arpeggiator and a polyphonic step sequencer for the Sequential Prophet‑5 / Prophet‑10 Rev4, added to Sequential's own Main OS 2.1.0 as a firmware patch. You apply the patch to your copy of the official OS in your browser and install the result over USB like any OS update. Everything is controlled from the front panel.

Built on someone else's idea. The notion of patching the Rev4's firmware, and the proof that it works, belong to another person: an arpeggiator mod that circulated privately showed the way and set the control conventions this project keeps (A440 as the arp button, Bank/Group for modes, Glide Rate for tempo). This project began as additions chained in front of that mod and makes several additions — the polyphonic sequencer with rests and ties, the keyboard octave shift, tap tempo, patch memory, tempo divisions, and more.

New here? The walkthrough takes you through every feature at the instrument, step by step; the manual below is the reference.

Not affiliated with Sequential. This is a hobby project that modifies the instrument's firmware. Installing a modified OS is at your own risk and may void your warranty. Only the project's own code, tooling and notes are published here; Sequential's OS files are not redistributed, which is why you supply your own copy.

What it adds

CLICK FOR MORE »

KASSER SYNTHS: Data science on 93,000+ Sega Genesis FM presets | Ludo2026 talk

video upload by KASSER SYNTHS

"In August we presented at Ludo2026: a data science look at more than 93,000 Sega Genesis / Mega Drive FM presets for the YM2612.

What we found:
Algorithm 4 with max feedback dominates.
Games leave algorithm fingerprints.
GEMS speaks a different grammar.

Explore all seven sonic realms in DAFMExplorer, our open source preset explorer:
https://dafm-explorer.vercel.app
Source code: https://github.com/kassersynths/DAFME...

Read the full write-up on our blog:
https://kassersynths.com/ludo2026-seg...

Want to hear a bank on real hardware? Load a DefleMask .dmp on a real YM2612:
https://kassersynths.com/load-deflema...

Kasser Synths makes FM synthesizers with real Yamaha chips, built in Santander, Spain.
https://kassersynths.com"

He Ripped a Synth Out of an Organ! Riha Orchestra 1978 Organ Rehomed

video upload by Vintage Keys Studio

"Steve Christie demonstrates the wonderful Riha Synthesizer which was taken from a large Riha Orchestra organ, and has now been fitted into a new standalone enclosure."

AI250 BXR Eurorack Test Equipment Mangling CV Edition

video upload by AI Synthesis

"A quick Demo video running an envelope and sine wave LFO into the BXR and getting variations of mangled control voltage. The audio is a static Sawtooth wave being filtered, and the filter being modulated by the mangled CV. For context, the CV input sources are all either a simple Saw style ADSR or sine wave.

The AI250 BXR is a eurorack module inspired by vintage nuclear test equipment. It can be used as an audio mangler, cv generator, and VCO. The BXR is a nod to vintage Boxcar Averagers, which were designed to acquire and analyze fast signals. The AI250 specifically replicates the real-time mathematical portion of a Boxcar Averager System, and processes audio or cv signals against either another signal or its internal v/o variable wave-shape VCO."

PlantsSystem-CHRONOS v1.0.0

video upload by plantssystem

"CHRONOS – a tiny granular synth built on a Raspberry Pi Pico2

CHRONOS is a DIY granular synthesizer running on a Raspberry Pi Pico 2(RP2350), with a Waveshare Pico-Audio DAC and a 1.3" Pico-LCD. It layers long, overlapping grains (roughly 0.7 to 3 seconds each) into slow, soft, ambient textures.

Features:

Grains are drawn from four waveforms: Sine, Triangle, Soft Saw and Bell

Four selectable scales: Hirajoshi, Miyako-bushi, Ryukyu and a Maj7 progression, with the chord changing automatically

Stereo ping-pong delay with feedback

Auto-pan that lets each grain drift across the stereo field

5-step tone control (low-pass), plus a Freeze function that sustains the current grains

The LCD shows every grain live: height is pitch, horizontal position is stereo placement, and size/brightness follows each grain's envelope"

Designing a Module - Prototype itteration with Instruō

video upload by Instruō

"In 2015/16 Instruō began as a video project. Specifically a time-lapse of me designing the original troika module.
Ten years later, I’ve returned to that idea with ceithir, a winter holiday project I designed with video documentation in mind.

Before the first full sized (58HP quad) ceithir hardware prototype, I focussed on a single filter channel version. This video covers the second prototype iteration of this single channel version. It was a pretty significant revision from the first one, but paved the way for the quad design.
The filter core board was designed with this design, which remained almost fully unchanged in its final form (I changed one resistor value).

CLICK FOR MORE »

8 voice poly to 12 voices

video upload by Craig Barnes

"This is the synth I made last year which was an 8 voice bi-timbral analogue polysynth with AS3340 VCOs and AS3372 filters in matrix 12 configuration. As happy as I was with the synth I thought it would be great to make use of what I've learnt on my last 12 voice DCO polysynth and apply it to this build. So I created some smaller 6 voice cards, made the LFOs in software on the PICOs and rewrote all the controller software. Early days, but it's sort of working, one voice card is slight louder than the other and it's effects don't work. I'm sure there is a lot more to do yet."

Roland SH-101 Session thru DIY Distortion TB-303 like ! By Element 4

video upload by tubeuser303

Lab 60 In Depth Walkthrough

video upload by Labyrinth Of Spirits

"Here is basically walk through the synth and how it works and sounds.

I will get another video up soon that has a no-talking preset sound demo to help show its versatility"

Follow-up to this post.

RECOSYNTH TUBE BASS

video upload by Arthur Joly

The 1010music Blackbox OG Just Got SP-1200 Mode, Chords and Sidechain (Unofficial Firmware Mod)

video upload by Justin Joe

"Twelve new features on the original 1010music Blackbox, added with an unofficial firmware mod: solo, chords, Elektron-style note conditions, SP-1200 / SP-12 / S950 lo-fi modes, a 24 dB filter, a sidechain ducker, slice start/end on the knobs, and a granular delay. It's free, the code is open, and it runs on top of stock firmware 3.1.9.

🔧 GET THE MOD (free) + get an email when new builds drop:
https://justinjoe.com/blackbox-mod

No compiling needed: download 3.1.9 from 1010music, run it through the browser patcher, copy it to your card.

⚠️ Unofficial. Not affiliated with, endorsed by, or supported by 1010music. Original Blackbox only (not Blackbox 2). At your own risk. The mod does not include 1010music's firmware; you bring your own copy."

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..."

SS1 #lmz #lmzvuk #analog #synth

video upload by LMZ

NM3

Pocket Viewer Wavetable Synth

video upload by Tim Kaiser

Overlooked Module #19: AI Synthesis X Filter (AI024)

video upload by Musical Miscellany & More

"Here's another Overlooked Module in the world of Eurorack. I built this one during Knobcon 14 (2026) at one of the DIY workshops. It's a great sounding 3320 filter that is reminiscent of many iconic 80's synths.

Buy Me a Coffee: https://buymeacoffee.com/musicalmisce...
Join my Discord Community: / discord"

See the introduction post here.

CHOMPI is Open Source!

video upload by chase bliss and CHOMPI CLUB

"Our little pal CHOMPI is officially being discontinued.

That's the bad news.

The good news is that we've decided to make it open source as a result. You now have everything you need to edit firmware, create your own firmware from scratch, and even physically build a DIY CHOMPI of your own.

We're also releasing a new beta firmware called WAVE – a wavetable synth – that's available for everyone to play with, and an ideal starting point for open source work.

You can find everything you need to get started on the CHOMPI website.

Open source info here:
https://www.chompiclub.com/opensource

WAVE firmware here:
https://www.chompiclub.com/firmware"

Reco-Modular & Phaser

video upload by Arthur Joly

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.