Notes about the file format:

All firmware files are using the .bin file format but the download links are linking to .zip files. After downloading, make sure to unpack the .zip file to reveal the .bin file. On Mac, the OS will try to also unpack the .bin file and will give you an error message, simply ignore this message.

Dual ADSR/DCO/uDCO:

Dual LFO

  • 02/01/2023: Dual LFO Rev.B v1.1: Solved an issue with tapped sample and hold sync (download)

Dual ADSR

  • 14/04/2021: Dual ADSR v1.1: Solves issues with the cycle mode (download and extract), update if your module hangs when changing A or D times in cycle mode

DCO/uDCO

What you will need:

  • the module to update
  • your eurorack case with power supply
  • a USB-B printer type cable or micro-USB cable depending on the module
  • a windows or MAC computer

Where to find the BOOT button on my module:

The button is always located on the lower PCB where you can find the module’s eurorack power connector.

  • Dual ADSR early PCBs
  • Dual ADSR latest PCBs
  • DCO 2021 version: located on the right side of the module, on the side of the USB connector
  • Dual LFO Rev B: most right tactile switch on the top edge of the PCB

Samples/S-909/S-LD

!IMPORTANT!! Be gentle with the module internal parts and the USB-Micro connector. Only handle with care and put your fingers where absolutely necessary. Check the back of your init, for marking either RevB or RevC. Please note: RevB units might not update due to a USB spec issue with a delivered batch of stm32 micro-processors. Try at your own risk (although the risks are low). The firmware updates were only advertised for S-LD units. Also the “Samples” RevB units don’t have the slide switch, so you can’t acces the toms sounds or choke option. This messy situation is occuring mostly because of the chip shortage and the small batch sizes that came with it. If you really need to update to a different version, please return your RevB Samples or S-909 and order the S-LD instead.

For RevC hardware:

  • 06/06/2022: 606 firmware for Rev C hardware (download and extract)
  • 16/06/2022: S-LD firmware for Rev C hardware with hihat gate-based length, shorten the hihat sound by sending shorter trigger/gate signals (download and extract)
  • 07/07/2022: 707 firmware for Rev C hardware with hihat gate-based length (download and extract)
  • 27/05/2023: S-909 firmware for RevB hardware (download)
  • 27/05/2023: Samples (808) firmware for RevB hardware (download)

For RevB hardware:

Mac tutorial:

  1. Turn off your eurorack case power supply and check your module power cable is connected correctly
  2. Press GENTLY the BOOT button on the module, keep it pressed down
  3. Turn on your eurorack power supply
  4. After 2 seconds release the BOOT button
  5. Connect the USB cable to both the module and the computer
  6. Navigate with a recent version of Google Chrome to: https://devanlai.github.io/webdfu/dfu-util/
  7. And follow the instructions in the video below (always select the DFU: @Internal Flash /0x08000000):

Windows tutorial:

  1. Turn off your eurorack case power supply and check your module power cable is connected correctly
  2. Press GENTLY the BOOT button on the module, keep it pressed down
  3. Turn on your eurorack power supply
  4. After 2 seconds release the BOOT button
  5. Connect the USB cable to both the module and the computer
  6. If this is the first time you are updating, download the latest Zadig version: https://zadig.akeo.ie/ (skip to step 8 otherwise)
  7. And install the drivers for Windows as shown in the video below
  8. When the drivers are installed, navigate with a recent version of Google Chrome to: https://devanlai.github.io/webdfu/dfu-util/
  9. And follow the rest of instructions in the video below: