# Firmware v4.0.0 for mkII **URL:** \ **Category:** Releases\ **Created:** [May 10, 2025, 5:20pm UTC](https://forum.electra.one/t/firmware-v4-0-0-for-mkii/3681 "2025-05-10T17:20:06Z")\ **Posts on this page:** 1\ **Showing post:** 20
**Author:** ![martin](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.electra.one/martin/32/145_2.png) [@martin](https://forum.electra.one/u/martin)\ **Post date:** [May 17, 2025, 6:23am UTC](https://forum.electra.one/t/firmware-v4-0-0-for-mkii/3681/20 "2025-05-17T06:23:13Z")
> [@patchen](#): > > This is great! I’m looking for a “what’s new” document or the like but can’t seem to find it. Could you send me in the right direction or perhaps list what’s changed? Almost everything was touched. I recommend taking look at the new documentation at [https://docs.electra.one/](https://docs.electra.one/). This is a brief overview of the most important changes: **Customizable Hardware Buttons** - You can now fully customize what each hardware button does. - **Standard** and **Alt** modes allow each button to perform **two different actions** , effectively doubling the number of available commands. docs: [Settings - buttons](https://docs.electra.one/userguide/settings.html#buttons) **USB Host** - Electra One can now fully route MIDI from USB MIDI devices to its internal ports. - Up to **16 MIDI ports per USB device** are supported, and **two USB devices** can be connected at the same time. docs: [Menu - USB Host](https://docs.electra.one/userguide/menu.html#usb-host) **Remote Knobs (CC Mapping)** - Use external MIDI controllers or DAW automation to control any on-screen parameters on Electra One. - Supports **bi-directional** communication: Electra can also send CC messages when controls are changed on the controller using knobs or a touchscreen. - Great for extending your control surface or automating parameters using standard MIDI CC. docs: [Settings - Remote Knobs](https://docs.electra.one/userguide/settings.html#remote-knobs) **MIDI Control for internal actions** - Electra actions (like page switching or preset loading) can now be triggered using **MIDI CC, Note, or Program Change messages** from external gear or software. - Offers the same level of control as hardware buttons, but via MIDI. docs: [Settings - MIDI control](https://docs.electra.one/userguide/settings.html#midi-control) **MIDI Routing** - A completely reworked **MIDI Router** lets you send MIDI between **any combination of USB, USB Host, and 5-pin MIDI ports**. - Each port and interface can be routed independently in both directions. docs: [Menu - Router](https://docs.electra.one/userguide/menu.html#router) **On-Device Configuration** - All device settings can now be accessed and adjusted directly on the controller using the new **Menu screen**. - No need for a computer to manage most functionality. docs: [Menu](https://docs.electra.one/userguide/menu.html) and [Settings](https://docs.electra.one/userguide/settings.html) **Snapshots reworked** - The Snapshots feature has been fully rebuilt. - Now supports **morphing** between two snapshots and **randomizing** parameter values. docs: [Snapshots](https://docs.electra.one/userguide/menu.html#snapshots) **Captures** - **Captures** let you record and replay individual **SysEx messages**. - Perfect for saving patch data or working with gear that uses SysEx dumps. In future generic MIDI message recording will be added. docs: [Captures](https://docs.electra.one/userguide/menu.html#captures) **New Controls and Variants** - **XY Pad** - **ADSSR / AHDSR / AR envelopes** - **Checkbox** docs: [Controls](https://docs.electra.one/userguide/concept.html) and [Editor sidebar](https://docs.electra.one/userguide/editor.html#the-sidebar) **User Interface Customization** - Disable knob-touch actions (e.g., for page or preset selection). - Define what happens on **double-tap** and **long-touch** gestures. - **Adjust display brightness** for stage or studio environments. docs: [Settings - Interface](https://docs.electra.one/userguide/settings.html#interface) **Bottom Menu Mode** - A new option allows the **page buttons to be shown permanently** at the bottom of the screen docs: [Bottom menu](https://docs.electra.one/userguide/firststeps.html#the-bottom-bar) **Preset Menu Screen** - Sending all control values - Randomizing parameters - Running custom Lua-defined functions docs: [Preset menu](https://docs.electra.one/userguide/presetmenu.html) **Preset Pinning** - Presets can now be **pinned** to keep running in the background while you switch to another one. - This enables **parallel operation** of multiple presets — ideal for setups with LFOs, sequencers, or MIDI generator presets. docs: [Pinning](https://docs.electra.one/userguide/presetmenu.html#pin-preset) **Preset Devices MIDI Settings Editable on the controller** - You can now adjust **MIDI port and channel assignments** for each device in a preset directly from the controller. - No need to edit original presets if only a MIDI port and/or MIDI channel needs to be adjusted. docs: [Device overrides](https://docs.electra.one/userguide/menu.html#devices) **Firmware Updates via Web Browser** - You can now update the firmware **directly from the Electra One web app** starting from 4.0.0 on, no need for bootloader mode or manual file copying. **Coming Soon in the Web Editor** These features are already implemented in the firmware, but editor support is still in development: **Multi-File Lua Scripts** - Presets can now include **multiple Lua files** , making it easier to organize complex code. - The web editor will soon support editing and managing these files directly. **Performance Page (with Macro Controls)** - **Performance Page** gives you a customizable extra page for key controls. - Supports: - **Simple references** to existing controls - **Macro-style controls** (multi-references) that affect multiple parameters at once - **Modulations and dynamic mappings** There has be many bug fixes included as well. --- _[View the full topic](https://forum.electra.one/t/firmware-v4-0-0-for-mkii/3681)._