Elektron Octatrack MKII firmware
Latest firmware
- Type of release
- Maintenance
- Manual
- User manual (PDF)
What's new in 1.40C
Last checked 27 Oct 2026
Looking for custom firmware for the Octatrack MKII?
The community is building alternative firmware for it. The best known:
- octabamby Sam Banks
- Modwerkby Jannik Aßfalg
- OCTAMAXby Maxolydian
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- An alert the day a new Octatrack MKII firmware ships, by email, Telegram or push
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Sign in, it’s free →Elektron Octatrack MKII manual & official pages
- Elektron Octatrack MKII user manual (PDF)opens in a new tab — elektron.se
- Elektron Octatrack MKII on elektron.seopens in a new tab — elektron.se
- Download Elektron Octatrack MKII firmware from Elektronopens in a new tab — elektron.se
Before you update the Elektron Octatrack MKII
- Secure your project to the Compact Flash card with PROJECT CARD SYNC. Setting a restore point or backing up the project to your computer is even better.
- Download the Octatrack OS file from the Octatrack MKII support page on the Elektron website.
- Connect the Octatrack to your computer with a USB cable. In the PROJECT menu, go to SYSTEM > USB DISK MODE and press [ENTER/YES] so the Compact Flash card appears as a drive.
- Copy the .bin OS file to the root of the Compact Flash card, not inside any folder.
- Unmount the Octatrack from your computer to exit USB DISK MODE.
- In the PROJECT menu, go to SYSTEM > OS UPGRADE, press [ENTER/YES], then press [ENTER/YES] again at the prompt to start the upgrade.
- Do not turn the Octatrack off until it has completed its startup sequence or tells you to restart. The OS may also upgrade the bootstrap after the upgrade.
- Restore your project with CHANGE PROJECT.
Sources: elektron.se (3 pages) · updated 24 Sep 2026
Requirements & compatibility
| Update method | Preferred: a .bin file copied to the Compact Flash card in USB DISK MODE, then SYSTEM > OS UPGRADE. Alternative: a .syx file sent over MIDI. |
|---|---|
| SysEx method | Connect the Octatrack's MIDI ports to a computer MIDI interface and send the .syx file with a program that can send SysEx files. The OS cannot be sent over the Octatrack's USB port. |
| SysEx software | Elektron's C6 is 32-bit and does not run on macOS 10.15 Catalina or later. Elektron names SysEx Librarian (non-Elektron) as a replacement. |
| Downgrade | Not supported by Elektron. Downgrading is at your own risk and user content may be lost. |
How to update the Elektron Octatrack MKII
Just for reference. For complete and up-to-date instructions, always refer to the manufacturer's official firmware page.
Elektron Octatrack MKII firmware update history
5 releases since Apr 2019, roughly one every 18 months.
Changelogs summarised from the manufacturer's release notes.
Version 1.40C — 27 Mar 2025 Maintenance
Release notes for this version are listed above.
Release notesopens in a new tab — elektron.seVersion 1.40B — 25 Jan 2023
Version 1.40A — 17 Dec 2020
Version 1.40 — 3 Dec 2020
Version 1.31 — 24 Apr 2019
Tracked in 27 rigs on FW//RADAR.
Common problems after updating
Octatrack OS upgrade over USB MIDI does not work
The SysEx OS upgrade cannot be sent over the Octatrack's USB port. Connect the Octatrack's MIDI ports to a computer MIDI interface, or use the .bin method with USB DISK MODE instead.
Octatrack SysEx OS upgrade is taking a long time
This is expected: the SysEx upgrade takes a while. The [TRIG] LEDs light up one after another as the OS is received, then the screen shows PREPARING FLASH followed by UPDATING FLASH. The OS is updated when that finishes.
Elektron Octatrack MKII firmware FAQ
What is the latest Octatrack MKII firmware?
The latest Octatrack OS is 1.40C, released March 27, 2025. It adds support for an updated production process. The 1.40 release it builds on added Parameter Randomization, Tempo Per Pattern, MIDI Trig Modes, parameter locking of multiple trigs at once and Trig Preview.
How do I update the Octatrack MKII OS?
Secure your project with PROJECT CARD SYNC, then put the Octatrack in USB DISK MODE, copy the .bin OS file to the root of the Compact Flash card, unmount, and run SYSTEM > OS UPGRADE from the PROJECT menu. Restore your project with CHANGE PROJECT afterwards.
Can I use Elektron Transfer to update the Octatrack MKII?
Elektron's support FAQ states that Transfer does not support the Octatrack MKI/MKII, and the Transfer page does not list it, although the OS readme mentions Transfer for the SysEx method. The .bin method needs no updater software.
Where can I download the Octatrack MKII manual PDF?
The Manuals section of the Octatrack MKII support and downloads page on the Elektron website has the User Manual and the Quick Guide, each in English and Japanese.
Can I downgrade the Octatrack MKII firmware?
Elektron does not support downgrading the Octatrack OS. If you do it anyway, it is at your own risk and user content may be lost.
How do I get the Octatrack MKII factory content back?
If you lost the factory content, for example after formatting the Compact Flash card, register your Octatrack MKII on the My Registered Machines page of your Elektron account. The factory content is then available on the My Sound Packs page.