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neutron-manager

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Unofficial Windows tool for the Behringer Neutron: settings editor, tuner, safe firmware backup/install and r15f guide

neutron-manager is custom firmware for the Behringer Neutron, by @nexushouser92. Latest release v1.0.0 (October 2026).

forBehringer Neutron·by@nexushouser92

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Custom license· nexushouser92/neutron-manager·downloads come from the creator’s GitHub releases

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Neutron Manager (unofficial)

A Windows tool for the Behringer Neutron: global settings editor, live tuner, safe firmware backup and install (including the alternative firmware r15f by mrf-r), and a reference of r15f's panel combinations.

[!NOTE] This is an unofficial project, not affiliated with or endorsed by Behringer or Music Tribe. The settings protocol was documented in clean-room fashion (see SPEC.md): no code or assets from the official editor are included.

Neutron Manager window

Download

Get Neutron Manager.exe from the latest release (Windows 10/11, no installation needed). Its SHA-256 is published next to it as SHA256.txt.

Features

  • Automatic linking over USB-MIDI: the Neutron is found as soon as it is plugged in.
  • All 37 global settings of the factory firmware (2.0.2 or later), grouped as Oscillators, LFO, Filter, MIDI and Keyboard. Each change is applied a moment after your last edit and read back to verify it. Changes made on the Neutron's own panel show up in the window.
  • Live tuner for both oscillators, from the readings the Neutron streams by itself.
  • Firmware tab through the chip's ROM bootloader (DFU):
    • full 128 KB backup first, always;
    • erases only the pages the new firmware uses, never the whole chip (so data stored elsewhere, such as calibration, is not wiped by the install itself);
    • every write is read back and compared;
    • refuses anything that is not an STM32F072 with the Neutron's flash layout.
  • r15f guide: every button combination of the alternative firmware, since r15f has no USB or SysEx.
  • Save and open settings as JSON. Spanish and English, from the Windows language.

Tuner

Documents

FileWhat it contains
SPEC.mdThe SysEx protocol, verified against a real Neutron 2.0.2
HARDWARE.mdWhat the Neutron's hardware can and cannot do
FIRMWARE_ANALYSIS.mdWhere r15f spends its CPU (947 of 1000 cycles) and how to measure and reduce it

Run from source

python -m pip install -r requirements.txt
python main.py

Tests (no Neutron needed: they use a simulated Neutron and a simulated bootloader):

python -m unittest discover -s tests -t . -v

Credits

Alternative firmware r15f and its manual: Evgeny "mrf" Chernykh, GPL-3, https://github.com/mrf-r/Neutron. Firmware files are not distributed in this repository.

MIT License.