• SoundCloud
  • YouTube
  • Instagram
  • Twitter

Firmware Update Procedure

1. Backup your presets & download the appropriate Teensy Loader software for your operating system:

OSX:         https://www.pjrc.com/teensy/teensy.dmg

Windows: https://www.pjrc.com/teensy/teensy.exe


2. Open the Teensy loader application, the interface will look like this:




3. Download the latest Flux firmware zip from this page (V1.03), open the zip and extract the HEX file to somewhere that is easy to find (desktop etc).


4. With your modular case powered down, remove Flux from your case but leave the power cable connected between Flux and your case. 


5. Connect a USB cable between the Micro-B USB port on the Teensy and your computer taking care to insert the Micro-B end in the correct orientation:





6. Power up Flux by switching on your case and in the Teensy loader software click File->Open HEX File. Navigate to where you extracted the HEX file and click Open. Press the program button shown below on the Teensy (the Flux display will freeze):

7. In the Teensy loader application, click the curved arrow to upload the firmware: 





If Flux does not auto re-boot after the firmware is uploaded, click the straight arrow to reboot:






Power down your case, remove the USB cable, re-screw Flux back into your case and the update is complete. EZPZ!

Firmware Release Versions

Open Beta V1.03, UI Updates & Bug Fixes:






Click To Download



  • ALL now blinks and blinking is now synced to the downbeat.

  • New uSD param added - LOAD SYNC. When you press play, master clocks are running in the background to keep all channels tightly synced. This param allows you to schedule a preset to load, synced to the master clocks. For smoothest musical transitions, it is recommended to use a 16th value that matches the dominant sequence length of your rhythm. Options are 1-64 16ths (default = 16). Leaving the preset screen before the scheduled load activates, cancels the load.

  • Preset name now loads with the preset for easy overwriting/editing of previously saved presets.

  • The letter Z is now selectable for preset names.

  • Fixed an issue with CV inputs affecting all channels in some circumstances.

  • Temporarily disabled screen saver to investigate user reports of an audible artifact when waking up from sleep.



Open Beta V1.02, UI Update:



Click To Download

General UI Updates

  • The box that indicates the active step on the UI is now thicker and blinks to make it easier to see which step is currently being edited

  • Holding the * button while navigating the main UI now jumps between pages

  • Main UI pages now show the active channel and step at the top of the page

  • Changed the on screen text for coarse parameter change from 'X10' to '*' to match the interface button

  • The Green and Blue colours of channels 2 & 3 are now much brighter (if this is still not bright enough I will edit again in the next update)

  • Fixed an issue with step outlines disappearing while selecting a step to edit when long steps are active

  • The active page dots are now larger

​Preset UI Updates

  • All actions in the preset UI are now confirmed by clicking the right encoder button. 

  • The right encoder button now has 3 modes selectable at the top of the UI: SaveDelete & Load

  • Deleting a file is now instant and achieved by scrolling to it in Delete mode and right clicking (no need to enter the name)

  • Loading a file is now achieved by scrolling to it and right clicking in Load mode

  • Left click is no longer used 

  • The UI skips the Name params when in Delete or Load mode (much faster to navigate) 

  • Automatically overwrite preset added to Save mode (much quicker to save iterations)

  • UI text updated

  • The UI now remembers which parameter was last active when switching between the main UI and uSD screen making switching between the two to make edits, iterations, loads and saves much faster

Open Beta V1.01:

  • Fixed an issue when using clock dividers on more than 1 channel.

Click to download


2K Queens Road

Titanic Quarter



United Kingdom


Please allow up to 48 hours

for a response to



Stay up to date

© 2020 IOLabs LTD. All rights reserved.