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4ms Meta Module firmware

4ms active Device launched 2024
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Latest firmware

2.4.0
released 2 Oct 2026
Download firmware from metamodule.info

What's new in 2.4.0

## What's Changed For discussion and overview of changes see: https://forum.4ms.info/t/firmware-v2-4-0-vcv-expanders-load-balance-panel/2822 ## Details * Midi Expander support by @danngreen in https://github.com/4ms/metamodule/pull/613 * CPU Load Re-balancing by @danngreen in https://github.com/4ms/metamodule/pull/616 * Fix simulator build with MIDI off and headless link errors by @thorinside in https://github.com/4ms/metamodule/pull/617 * Support VCV expander modules by @gabriel-roth in https://github.com/4ms/metamodule/pull/615 * Plugin .fini_array destructors by @danngreen in https://github.com/4ms/metamodule/pull/619 * Allow MIDI CC mappings to be in Toggle mode by @danngreen in https://github.com/4ms/metamodule/pull/618 * Littlefs cleanup by @danngreen in https://github.com/4ms/metamodule/pull/620 * Implement native module context menus by @gabriel-roth in https://github.com/4ms/metamodule/pull/605 * Patch View: zoom and re-arrange modules freely, and use VCV patch layout: https://github.com/4ms/metamodule/pull/622 * Grouping, ordering and custom name for params and jacks in element roller: https://github.com/4ms/metamodule/pull/606 * Add Befaco Mex module * Add groups, orders, and names for some multi-channel 4ms modules * Add `make jprog-assets`, `make flash-stlink-assets` and `make flash-t32-assets` to update the assets.uimg in RAM with a JTAG debugger * Improve developer console with a prompt `> ` and backspace support. * Fix LEDs hidden behind a mapped button * Add "Step" mode to button, MIDI CC and MIDI Note Gate mappings * Handle I2C dropouts with expanders more robustly. * Add button expander support in simulator (Shift + number) * Fix crash when reloading a plugin via Dev Drive ## New Contributors * @thorinside made their first contribution in https://github.com/4ms/metamodule/pull/617 **Full Changelog**: https://github.com/4ms/metamodule/compare/firmware-v2.3.1...firmware-v2.4.0

Last checked 27 Oct 2026

Release notes on github.com ↗

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How to update the 4ms Meta Module

Download the firmware from metamodule.info/downloads and save the metamodule-firmware folder to a USB drive or microSD card. On the MetaModule, open Settings from the Main Menu and select Update. Insert the drive and click Update Firmware; the module detects the drive and shows the version and contents (main firmware, Wi-Fi firmware, bootloader, assets) before you start. Keep the module powered on for the whole update, about one minute. If you are also updating plugins, update the firmware first: power up with no drives inserted so no plugins are pre-loaded, insert the drive, update the firmware, then reboot with the drive still inserted.

Just for reference. For complete and up-to-date instructions, always refer to the manufacturer's official firmware page.

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4ms Meta Module firmware update history

8 releases since Apr 2026, roughly one a month.

Changelogs summarised from the manufacturer's release notes.

Version 2.4.0 — 2 Oct 2026

Release notes for this version are listed above.

Release notesopens in a new tab — github.com

Version 2.3.1 — 26 Aug 2026

## What's Changed * Usb composite device: MIDI + console: https://github.com/4ms/metamodule/pull/610 * Usb Developer Mode: enables MSC drive for loading plugins during development by @danngreen in https://github.com/4ms/metamodule/pull/612 * Improve param z-order (support for Iroi's stacked knobs): https://github.com/4ms/metamodule/pull/609 * Add Befaco Iroi to metamodule by @hemmer in https://github.com/4ms/metamodule/pull/577 * MIDI PC patch change stays on JackMap or KnobSet pages if already there: https://github.com/4ms/metamodule/pull/608 - Recover from more types of plugin errors (Data Abort, uncaught exceptions) * Use less memory when loading plugins by lazily populating element list for VCV plugins by @danngreen in https://github.com/4ms/metamodule/pull/611 * Fix some USB devices with large config descriptors not loading by @danngreen in https://github.com/4ms/metamodule/pull/614 **Full Changelog**: https://github.com/4ms/metamodule/compare/firmware-v2.3.0...firmware-v2.3.1-rc3
Release notesopens in a new tab — github.com

Version 2.3.0 — 3 Aug 2026

## What's Changed ### New Features * Memory allocation system refactored in order to recover when plugins run out of memory or crash by @danngreen in https://github.com/4ms/metamodule/pull/601 * Firmware runs with c++ exceptions enabled * All firmware allocations that might result in out-of-memory are caught and reported to the user, without crashing. * Plugin heap is separate from firmware heap, so a plugin can safely be removed without crashing the firmware. * Plugins that throw an exception (e.g. out of memory) can can be caught by firmware, and cleaned up. * Plugins that crash (e.g. an uncaught exception, or ends up calling std::terminate or abort()) can be recovered, but not cleaned up (there may be memory leaks in the plugin heap). * Firmware is self-extracting (smaller binary, loads faster) * Splash screen while firmware is booting and extracting * Support sliders in Module menu (context menu for modules) by @danngreen in https://github.com/4ms/metamodule/pull/598 * Simulator extplugin quality-of-life improvements by @danngreen in https://github.com/4ms/metamodule/pull/602 * Simulator: Support multiple key bindings per action, add Enter and Backspace by @KotMorderca in https://github.com/4ms/metamodule/pull/599 * Compress firmware and self-extract on boot and add splash-screen by @danngreen in https://github.com/4ms/metamodule/pull/604 ### New USB Features * Major refactor of USB manager by @danngreen in https://github.com/4ms/metamodule/pull/597 * Add USB Device mode: Can function as a USB Device, or Host, or auto-detect host/device. * MIDI Device mode: Can connect to a computer as a MIDI Device. * UVC Video device: Can function as a webcam device to mirror the screen to a computer. * Console device: Can function as a CDC console for debugging or reading logs * SDK API for USB and USB-MIDI queries: modules can query the USB connection status, and probe into available USB MIDI jacks and cables. [...]
Release notesopens in a new tab — github.com

Version 2.2.1 — 15 Jul 2026

## What's Changed * Module image generation tests by @danngreen in https://github.com/4ms/metamodule/pull/593 * Midi CC 14bit by @danngreen in https://github.com/4ms/metamodule/pull/589 * Fix headless simulator: restore the build, register built-in plugins, separate build dirs by @gabriel-roth in https://github.com/4ms/metamodule/pull/587 * Register bundled vcv_ports brands in the headless simulator by @gabriel-roth in https://github.com/4ms/metamodule/pull/588 * Simulator MIDI support by @danngreen in https://github.com/4ms/metamodule/pull/594 * CPU load tests: test plugins one at a time by @danngreen in https://github.com/4ms/metamodule/pull/596 - Add missing RackCore module metadata - Fix small memory leak in addLightSlider() - Fix Plateau not updating allpass size when lfo depth set to 0 - Fix Feline crash at 24kHz - Fix display issue with very small numbers using sci notation in Manual Adjust pop-up - Fix scrolling issue on Jack Maps page - Fix MIDI poly voices stealing from other channels **Full Changelog**: https://github.com/4ms/metamodule/compare/firmware-v2.2.0...firmware-v2.2.1
Release notesopens in a new tab — github.com

Version 2.2.0 — 22 Jun 2026

## New Features * Support polyphonic cables, with a maximum of 4 voices per cable - Modules derived from rack::engine::Module (i.e. plugins ported from VCV Rack) will usually "just work" with a max of 4 voices. - New helper classes CoreProcessorPoly and SmartCoreProcessorPoly for native plugins - API is backwards compatible with all v2.x plugins (original CoreProcessor base class is untouched -- only new types are added) - Full support for cables with summed input nodes, splits, poly->mono conversions, etc with poly cables. - Poly cables are drawn thicker in the Patch View * Add built-in MIDI support for 4-voice polyphony per cable - Max 8 voices using 2 poly cables (each poly MIDI cable can be voices 1-4 or voices 5-8) - Can set the MIDI poly number directly in the Patch Info dialog box (default is Auto = auto-detect based on cables in the patch) ## Modules 4ms CoreModules: * Update most 4ms modules to use polyphony. Some modules that aren't updated will likely never be made poly (because they are inherently a mono module, or due to memory usage concerns) RackCore: * Add RackCore Sum, Merge, and Split modules for poly support. * Remaining VCV Core MIDI modules added (Gate_MIDI, MIDI_Gate, MIDICC_CV ## Improvements and Fixes * Build simulator DSP at -O2 so the audio callback meets its real-time deadline by @gabriel-roth in https://github.com/4ms/metamodule/pull/585 * Default simulator LOG_LEVEL to WARN so errors are visible with plain cmake by @gabriel-roth in https://github.com/4ms/metamodule/pull/584 * Define no-op `plugin` target in simulator's create_plugin() to match real SDK by @gabriel-roth in https://github.com/4ms/metamodule/pull/586 * Fix New Panel Cable showing outputs for a connected module input by @gabriel-roth in https://github.com/4ms/metamodule/pull/590 * Fix cable node list on ModuleView page and Jack Maps page by @danngreen in https://github.com/4ms/metamodule/pull/591 * Fix MIDI voice allocations [...]
Release notesopens in a new tab — github.com

Version 2.1.17 — 1 Jun 2026

## What's Changed * MIDI PC messages can be assigned to load patches (https://github.com/4ms/metamodule/pull/576) * Can replace or substitute a module in a running patch (https://github.com/4ms/metamodule/pull/575) * Option to "Wrap navigation" in Module View in https://github.com/4ms/metamodule/pull/571 * Midi sysex and USB cable ID support in https://github.com/4ms/metamodule/pull/572 * Improve CPU performance by compacting toggler params * Patch cpu tests in https://github.com/4ms/metamodule/pull/574 * Heap increase to 300MB in https://github.com/4ms/metamodule/pull/573 * Fix bug with jack alias keyboard not hiding * Fix MIDI note allocation in legacy poly mode * Fix possible crash at boot if aux core re-inits MMU while main core is running * Fix occasional erroneous "A new version was just transferred but you have unsaved changes..." message when saving **Full Changelog**: https://github.com/4ms/metamodule/compare/firmware-v2.1.16...firmware-v2.1.17
Release notesopens in a new tab — github.com

Version 2.1.16 — 22 Apr 2026

Version 2.1.15 — 21 Apr 2026

## What's Changed * MetaButton Expander can change knobset by @danngreen in https://github.com/4ms/metamodule/pull/566 * Reduce Notifications by @danngreen in https://github.com/4ms/metamodule/pull/567 * Display firmware update version and contents on Firmware Update tab by @danngreen in https://github.com/4ms/metamodule/pull/568 * Fix various memory errors by @danngreen in https://github.com/4ms/metamodule/pull/569 **Full Changelog**: https://github.com/4ms/metamodule/compare/firmware-v2.1.14...firmware-v2.1.15
Release notesopens in a new tab — github.com

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4ms Meta Module firmware FAQ

What is the latest firmware for the 4ms Meta Module?

The latest firmware for the 4ms Meta Module is version 2.4.0, released on 2 Oct 2026. FW//RADAR last checked 4ms's official page on 27 Oct 2026.

How do I update the 4ms Meta Module?

Download the firmware from metamodule.info/downloads and save the metamodule-firmware folder to a USB drive or microSD card. On the MetaModule, open Settings from the Main Menu and select Update. Full instructions on 4ms's official firmware page.

Where can I download 4ms Meta Module firmware and drivers?

Directly from 4ms's official firmware page — FW//RADAR links to the source and never hosts firmware files. Official firmware page →

Where can I find the 4ms Meta Module manual?

The official 4ms user manual is published on metamodule.4ms.info. 4ms Meta Module user manual →