elekloader kit 0.4.0

The kit is elekloader's builder for websites: the TypeScript engine, a builder worker, a client for the page and a catalog format. A site serves the kit and a catalog, and its visitors build custom OS files in their own browser. Their stock OS file never leaves it.

This is a pre-release for websites, not an app release. The Windows and macOS apps, their cores and the web page stay on v0.4.0.

Files

File	sha256
elekloader-kit-0.4.0.zip	576b7d44639d4abeb1351a7771b4e3a1ef91f0b7cbcc69f64db9bb5255bf70ad
elekloader-catalog.json	06d8308f029bdc5e50f6f030e62b4e0be55c5da8d85f0f5fb8d3fe39957491e5

• The kit, from commit a1be3ce (#48):
  • src/: the engine and the kit in TypeScript, for a site with a bundler;
  • dist/: the same as plain JavaScript, for a site without one;
  • tools/kit.ts: feed, sync, verify and lock;
  • examples/minimal/: the smallest site;
  • LICENSE (GPL-3.0-or-later), NOTICE, README.md (the integration guide) and kit.json (version 0.4.0, protocol 1, every file's sha256).
• Reproducible. python packaging/build_kit.py --out build/kit at a1be3ce, with Node 24.19, gives the same zip, byte for byte.
• The catalog is the mod shop's list in the kit's format (schema 1, revision a1be3ce). It has 6 cores and 55 mods, for the Digitakt (19), the Digitone (2) and the Octatrack (34). Each file is pinned by sha256 to its author's release or commit, and feed read every one with the engine.

Use it

1. Check the zip against its sha256 above.
2. Follow its README.md (docs/INTEGRATING.md): serve dist/ or bundle src/, then copy the devices you offer from the catalog:

   node tools/kit.ts sync elekloader-catalog.json public/elekloader-catalog --device digitakt-mk1 --device digitone-mk1

3. Pin both with tools/kit.ts lock, and check what you deploy with tools/kit.ts verify --lock.

A site written for protocol 1 should refuse another: init's reply carries it. Nothing from Elektron is in either file.

elekloader 0.4.0

A mod loader for Elektron firmware. You pick mods and supply the stock OS file Elektron publishes for your device. elekloader builds a custom OS file on your own machine, and you flash it the way you flash any OS update.

• Nothing from Elektron is distributed. A mod (.elemod) carries only its author's bytes, plus hashes of the stock bytes it expects.
• The bootloader is never touched. Every output is re-read and verified before it is written, so the stock OS file always recovers the device.
• Mods are checked against each other before anything is built: overlapping bytes, memory, named resources and requirements.

Install

In your browser, nothing to install: https://irpina.github.io/elekloader/. Drop in your stock OS file, add mods or browse the mod shop, build, and download the result. Your files never leave your machine.

Windows: download elekloader-0.4.0-windows.exe below and run it. There is nothing to install and no Python needed. The exe is not signed, so Windows may say it protected your PC: choose More info, then Run anyway.

macOS: download elekloader-0.4.0-macos.dmg below, open it, and drag elekloader to Applications. It runs on Apple silicon and Intel Macs, and it is signed and notarized by Apple.

The first time, the app asks for your stock OS file, exactly as Elektron publishes it (the .zip works as it is). Add mods with + Install from file..., tick them, and BUILD FIRMWARE. Every device's core is built in and ticked for you with any mod that needs it. On Linux, run from source (Python 3.9 or newer): see the README.

Supported

Device	OS
Digitakt (mk1)	1.53, 1.54	linkable mods and whole builds
Digitone (mk1) and Digitone Keys	1.43, 1.44	new: linkable mods and whole builds
Octatrack (MKI and MKII)	1.40C	whole builds; new: linkable mods with its own core (checked in an emulator, not yet on a unit)

A mod is made for one OS version: one built for 1.53 is refused with a 1.54 stock file. Use the file its author made for your OS.

New in 0.4.0

• Digitakt OS 1.54 and Digitone OS 1.44, Elektron's releases of 2026-09-30 (Outbox 8 routing). Each has its own core.
  • The Digitakt's core 2.1 on 1.54 was checked in digikit's emulator against stock 1.54: every screen identical.
  • The Digitone's 1.44 core is the same code with 1.44's addresses. It lints, links and verifies, but the emulator does not boot stock 1.44 yet.
• The Digitone mk1 and Digitone Keys: whole builds, and linkable mods with the Digitone's core. digihealth 1.1 brings SYSTEM INFO to it.
• Core 2.1 (Digitakt): SRC machine slots. Mods add SRC machines past the stock four: digislicer's DIGISLICER and digineighbor's NEIGHBOR, together.
• The Octatrack's core reserves RAM for mods and copies their code there at boot. octabam's ColdFire modules convert to linkable mods (elekloader.sdk.octabam).
• elekloader in the browser, on GitHub Pages, with a mod shop of curated mods from their authors' releases.
• The macOS app, signed and notarized.
• For mod authors:
  • mod.json's ports builds one mod for several OS versions from one folder (ADAPTING.md, 3.10).
  • Code can be placed at a fixed address (fixed).
• Licence: GPL-2.0-or-later.
• The window opens at a size that shows everything, and it says "for other firmware" for mods made for another device or OS version.

Files

file	sha256
elekloader-0.4.0-windows.exe	d19d0656b0b6965c88f9fecf873c4fd9535f73a767ea6d0a9e51760a5d11a3a4 (built from v0.4.0 by the windows-build workflow)
elekloader-0.4.0-macos.dmg	385241d88723ecfb551a67455ae0bc50de8ea96699fe1e84f7217a2f3ecd403e (built from v0.4.0, signed and notarized by the macos-build workflow)
core-2.1.elemod	f38b0c193677a060b3fdb28fe71b9332be8a5e7d36ecaf91a3c86a61bab558eb: Digitakt mk1 1.53
core-2.1-os1.54.elemod	8c1fe78ccd1427d6a93f181eaad9f064efb65cf6dd683192dbcc33e83dc548b9: Digitakt mk1 1.54
core-dn1-2.0a.elemod	c6d9dbed28965bce4a827c292f499c8f5309187bf136ffb52e237bd01186b54f: Digitone mk1 1.43
core-dn1-2.0a-os1.44.elemod	5707a38e98047854eb12e5870430fb323126224f25b2a10b725badb93b97a41a: Digitone mk1 1.44
core-ot-0.1.elemod	e7b3054fba52bbd5fc88fe6c766d08bcc825fcb7e9ca968fd37c714225d8942f: Octatrack 1.40C

The cores are built into both apps, and built from v0.4.0's mods/ with the SDK. core-2.1.elemod is the same code as the core 2.1 that digislicer 2.0 shipped; only its build record differs.

Mods

• digislicer 2.1: DIGISLICER, the SLICE machine with a slice editor, AUTO, PIPO and trig slice mode (Digitakt 1.53, 1.54).
• digihealth 1.1: FAST AUDIO and SYSTEM INFO (Digitakt 1.53, 1.54), SYSTEM INFO (Digitone 1.43).
• digineighbor 0.6: a NEIGHBOR machine, a prototype (Digitakt 1.53, 1.54).

Custom firmware is at your own risk. elekloader is not affiliated with Elektron.

elekloader 0.3.0

A mod loader for Elektron firmware. You pick mods and supply the stock OS file Elektron publishes for your device. elekloader builds a custom OS file on your own machine, and you flash it the way you flash any OS update.

• Nothing from Elektron is distributed. A mod (.elemod) carries only its author's bytes, plus hashes of the stock bytes it expects.
• The bootloader is never touched. Every output is re-read and verified before it is written, so the stock OS file always recovers the device.
• Mods are checked against each other before anything is built: overlapping bytes, memory, named resources and requirements.

Install (Windows)

1. Download elekloader-0.3.0-windows.exe below and run it. There is nothing to install and no Python needed.
2. The first time, it asks for your stock OS file, exactly as Elektron publishes it. The .zip from Elektron's site works as it is.
   • Digitakt mk1: Digitakt_OS1.53.syx
   • Octatrack MKI or MKII: OCTATRACK_OS1.40C.syx or .bin
3. Add mods with + Install from file..., tick them, and BUILD FIRMWARE.

The exe is not signed, so Windows may say it protected your PC: choose More info, then Run anyway. The core mod is built in and ticked for you with any mod that needs it. On Linux, run from source (Python 3.9 or newer): see the README.

Install (macOS)

1. Download elekloader-0.3.0-macos.dmg below, open it, and drag elekloader to Applications. It runs on Apple silicon and Intel Macs, with no Python needed, and it is signed and notarized by Apple.
2. Then as on Windows: the first time, it asks for your stock OS file; add mods with + Install from file..., tick them, and BUILD FIRMWARE. The core mod is built in.

Supported

Device	OS
Digitakt (mk1)	1.53	linkable mods and whole builds
Octatrack (MKI and MKII)	1.40C	new: whole builds (format-1 mods). A build writes the .syx and the card file .bin

New in 0.3.0

• The Windows app, with core built in. On the first run, or when the remembered file has moved, it asks for the stock OS file. When a file is not one it knows, it says why and offers another try.
• The Octatrack, OS 1.40C. elekloader reads, rebuilds and verifies its .syx (legacy SysEx) and .bin (card file), and reproduces both stock files byte for byte. The copy of the bootloader that the OS can re-flash stays stock. README: flashing it from the card, and recovery.
• mkmod --diff turns a custom build into a whole-build mod by comparing it with stock, e.g. an Octatrack build from octabam.
• The window hides mods for other devices (they come back with Show mods for other devices) and shows each mod's licence (the new license field).
• Ticking a mod also ticks the mods it requires.

Files

file	sha256
elekloader-0.3.0-windows.exe	177159b90a36baae748d72c89216ea2586acd29eb0452e6891c2278042b6f859 (built from v0.3.0 by the windows-build workflow)
elekloader-0.3.0-macos.dmg	e33a2c16acd07f619420be1b48356c603a94b1274b2f66c9d287d0dfcead6090 (added later: v0.3.0's code, built, signed and notarized by the macos-build workflow)
core-2.0a.elemod	21f868b9ecf5e765fe2b813c430ad269ad599fa1493f9220a7e20267bd2801d0 (unchanged since 0.2.0; built into the exe)

Mods

• digislicer: a slice editor for the SLICE machine (Digitakt).
• digihealth: FAST AUDIO (a lower DSP load, the same audio) and SYSTEM INFO (Digitakt).

Custom firmware is at your own risk. elekloader is not affiliated with Elektron.

elekloader 0.2.0

A mod loader for Elektron firmware. You pick mods and supply the stock OS file Elektron publishes for your device. elekloader builds a custom OS file on your own machine, and you flash it the way you flash any OS update.

• Nothing from Elektron is distributed. A mod (.elemod) carries only its author's bytes, plus hashes of the stock bytes it expects.
• The bootloader is never touched. Every output is re-read and verified before it is written, so the stock OS file always recovers the device.
• Mods are checked against each other before anything is built: overlapping bytes, memory, named resources and requirements.

Supported: Digitakt (mk1), OS 1.53. Python 3.9 or newer, nothing else to install:

python -m elekloader                 # the window
python -m elekloader.patch --stock Digitakt_OS1.53.syx --mod core-2.0a.elemod --mod a.elemod --out custom.syx --version 2.0a

New in 0.2.0

• The .elemod format. Files from before it, .dtmod, still load.
• Tools for mod authors: the SDK (python -m elekloader.sdk.build: sources to .elemod), python -m elekloader.lint, and docs/ADAPTING.md, with rules, commands, every refusal and its fix, and a definition of done.
• The core mod's sources in mods/core. Core is the boot copier and the hook bus every linkable mod needs. It is attached here, built.

Files

file	sha256
core-2.0a.elemod	21f868b9ecf5e765fe2b813c430ad269ad599fa1493f9220a7e20267bd2801d0

Checked alone in digikit's emulator, with a cold boot through the real bootloader. Its screens and audio are identical to stock's; only where the recording ends moves, by one silent 1 ms block.

Mods

• digislicer: a slice editor for the SLICE machine.
• digihealth: FAST AUDIO (a lower DSP load, the same audio) and SYSTEM INFO.

Custom firmware is at your own risk. elekloader is not affiliated with Elektron.