Documents and Firmware

The NDLR User Manual v1.7 English (Feb 2020)
Applies to Firmware version 1.1.064 or later

The NDLR User Manual  v1.6 Française (July 2019)
Special thanks to Benoit Ruelle for the review and translation!

 The NDLR User Manual v1.8 Deutsche (May 2020)
Special thanks to Michael Menze for the German translation!

The NDLR User Manual v1.7 Español (Dec 2020)
Special thanks to Jaime Fuentes Pérez for the Spanish translation!

The NDLR Quick Start Guide English (May 2020)

 Jesse’s Chord Seq Tutorial English (April 2021)

The NDLR Firmware Updates

When a new firmware update is available, follow the instructions below for downloading and installing The NDLR firmware and firmware update utility for your PC operating system. Windows, Mac or Linux.

The latest NDLR Firmware Update: NDLR_v1.1.073.ino.hex (Oct 26, 2020)

Note: more recent “beta” releases may be found on the Conductive Labs forums. You must be a registered user and logged in to download them. Release notes are on the beta forum.

The NDLR firmware version 1.1.066 is shipped on the 3rd batch of NDLRs. Those wishing to update from earlier versions should be aware that it will require resetting The NDLR to factory defaults. Get it (or a later beta version) from the forum as noted above. 

You can check the firmware version by going to the System 3 menu on The NDLR.


  1. Install the Teensy Loader program
    Download the Teensy Loader for Windows from PJRC.COM: or for Mac:
    Save it to someplace convenient where you can find it, like to the desktop.
    Note: more details for using the Teensy Loader on various supported platforms can be found here:   PJRC Teensy Loader page
  2. Download the latest The NDLR firmware and Unzip it Download The NDLR firmware file and save it to your desktop or another convenient location where you can find it.Un-zip the .hex file from the .ZIP file (that you downloaded above) to your desktop or another convenient location where you can find it.
  1. Load the Firmware on The NDLR Connect The NDLR to your computer with a USB cable.
    Run the Teensy Loader program
    by double clicking it.
    Click on File, then Open HEX File. Select the  .hex file you extracted above.

    Alternatively, find the .hex file with Windows File Explorer, or on the Mac, click on the Downloads icon and choose “Open in Finder”. Then drag and drop the .hex file onto the Teensy Loader program. Click the green Auto button so it is lit:

    Then use a pen or paper clip to briefly press the recessed FW button on The NDLR. It’s between the pairs of MIDI ports on the back.
    It takes about 1 second to program. The NDLR will restart once it is programmed.
    If you get a message that the file is too large, it typically indicates that the Teensy Loader program does not recognize which version of Teensy it is connected to. First make sure you clicked on the green Auto button as shown above. You can ignore the error and try pressing the FW button on The NDLR to see if it will work. If it fails, the .hex file may be corrupt. Try downloading and extracting the .hex file from the ZIP file again.

Subscribe to the forums for announcements including new firmware updates and release notes.

 EU Declaration of Conformity for The NDLR