Within about two weeks in October 2026, three music hardware makers each put firmware code for their instruments on GitHub. Erica Synths opened the LXR-02 drum machine. Music Tribe, Behringer's parent company, published a source repository for the KICK (BE 0700-AAM) before the product reached retail. M-Vave released an official SDK and firmware package for its FM-1. On 28 October the independent trade blog Synthtopia asked whether open firmware will become the next big trend in electronic music gear.

Embedded developers should read the fine print before calling it a trend. These three releases differ in licence, in how much of the code is actually open, and in how much support the vendor promises. This piece goes through each one using the companies' own pages and repositories. Synthtopia is the only independent outlet we drew on.

Erica Synths: full firmware release, no warranty on your build

Erica Synths announced the change in a news post dated 23 October 2026: "The LXR-02 drum machine firmware is now open source and available on the Erica Synths GitHub!" The company presents this as opening the instrument to community experimentation, and it links the timing to what it calls "vibe hacking," meaning people modifying firmware with help from AI coding tools.

The support terms are clear. According to Erica Synths' announcement, the company officially supports only the original LXR-02 firmware. Modified or community firmware is installed at the user's own risk. A second post in the same news section, dated 29 October 2026, says the LXR-02 Eurorack module is now open source too.

The announcement does not name a licence, and Erica Synths' post does not list the MCU or toolchain. We are not going to guess at either. Check the repository itself before you plan a fork.

Behringer KICK: AGPL-3.0, published before the product ships

Music Tribe's release is unusual because the product is not in shops yet. The MusicTribeOpenSource/0700-AAM repository was created on 14 October 2026, last pushed on 23 October 2026, and is licensed under AGPL-3.0. That is the strongest copyleft licence among the three projects. If you distribute modified versions, you must release your source under the same terms.

The repository's description calls the KICK a "Professional Standalone Music Production Center with 7" Touch Screen, Sampler, Touch Strip and Music Tribe JAM DAW." The README lists these 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

Treat that list as provisional. Synthtopia says the KICK's eventual hardware specifications, software support and retail availability should not be assumed to be final. The repository is split into an application, an audio engine library, a hardware communication protocol and a Buildroot Linux image, with the Music Tribe code under AGPL-3.0-or-later. So this is a Linux-based device rather than a microcontroller drum box. The README gives no processor, RAM or storage details, so we will not speculate about them.

M-Vave FM-1: official SDK, closed sound engine

M-Vave's release is its response to developer interest in the FM-1. Synthtopia describes the FM-1 as a compact, affordable FM synthesizer whose hardware has become a target for independent developers, and says M-Vave's answer was to provide an official development platform. The result is the m-vave/fm1_open repository, labelled FM1 Open V14. It was created on 13 October 2026 and last pushed on 21 October 2026.

Of the three repositories, this one gives the most detail about the hardware. According to the README:

  • 8 tracks and 8 sample slots, with 16 FX demos
  • A binary SDK is included
  • A browser-based workbench, which the README places at open.m-vave.com/fm1-workbench
  • V14 features: a 128-voice DX7 library, per-track roles, step recording, internal tempo from 30 to 300 BPM, and delay with tempo sync plus fixed times of about 30 to 2040 ms
  • MIDI input over DIN, USB and BLE; MIDI output over USB and BLE
  • The eight sample slots share about 19.55 seconds of new sample storage

The build requirements show what toolchain is involved. Firmware builds require Windows x64 and JieLi Windows toolchain 2.5.3, which includes PI32v2 clang 4.0.1, and the README says the FM-1 continues to use the r3 CPU target. The repository does not say which JieLi part is used, so we will not name one.

The openness has limits. The README licenses the application code under GPLv3 with an FM1 SDK linking exception, while the device engine is supplied as a binary SDK under separate terms. Synthtopia makes the same point: the sound-engine library remains a binary component. You can change how the device behaves, how tracks are sequenced and how the interface works, but the synthesis core is a closed library you link against.

The others: Akai previews, Roland gets hacked

Synthtopia mentions two more cases that show the range. Akai Professional has previewed SampleKey, a keyboard with 25 keys, pitch and modulation wheels, a display and sampling, and an open-firmware approach for it. Akai's parent company, inMusic, has indicated its approach will include community access to hardware, open-sourcing some software, and a software development kit. The exact scope is still to be announced. For now that is a statement of intent, not a release.

Synthtopia also covers "DOOM OS" for the Roland SP-404MKII, by Klangfeld Labs. It is not an official Roland release, and its current published release is version 0.6.2-alpha, based on Roland firmware 5.52. This is the older pattern: the community modifies a device and the manufacturer stays out of it.

Three models of "open"

For embedded readers, the useful question is what each vendor actually released, not whether open firmware is a trend.

  • Erica Synths published firmware source for its LXR-02 drum machine and, later, its Eurorack sibling. It keeps a clear line between official and community builds, and the user carries the risk.
  • Music Tribe published AGPL-3.0 source for a product that is not yet at retail. This tells future forks to stay open, but the hardware spec is not final.
  • M-Vave published an official SDK with GPLv3 application code and a binary device engine, tied to a Windows-only JieLi toolchain.

Erica Synths says outright that "vibe hacking," AI-assisted modification of software, was part of its reasoning. M-Vave's SDK followed independent developer interest in the FM-1. Synthtopia's broader argument is that vendors are exploring official channels for modification, and that the releases are not identical in scope.

What It Means for Makers

Who it is for. These releases are aimed at firmware developers and tinkerers who own or plan to buy one of these devices. They are also useful study material for anyone learning how commercial audio firmware is structured, from sequencers to sample playback and MIDI handling. With the FM-1, developers can also work with a JieLi toolchain they are unlikely to have used before.

What it enables. On the LXR-02 you can build custom firmware from the vendor's own source instead of reverse-engineering binaries. The FM-1 SDK lets you modify the application layer, including tracks, roles and MIDI routing over DIN, USB and BLE, while the device engine stays a binary. The KICK repository lets you read the software for a device before it reaches retail, which is unusual. Under AGPL-3.0, any fork you distribute must stay open.

What to watch for. Erica Synths supports only its original firmware, and community builds are installed at your own risk. The FM-1 build chain needs Windows x64 and JieLi toolchain 2.5.3, so Linux and macOS developers will need a Windows machine or a VM. The M-Vave README also warns that firmware switching does not make project and sample formats interchangeable, so keep backups. The KICK's specs are not final.

Price and availability. None of the sources we reviewed give a price for the LXR-02, the KICK, the FM-1 or SampleKey, so we are not quoting any. Status as the sources describe it:

  • LXR-02 firmware: open source as of 23 October 2026. The Eurorack module followed on 29 October 2026.
  • Behringer KICK: source published before retail release. Hardware specs and availability are not final.
  • M-Vave FM1 Open: V14 is on GitHub with a binary SDK.
  • Akai SampleKey: previewed only, with scope still to be announced.

Sources