How to Install an XMOS Firmware Update

Installing Firmware Updates

These instructions are compatible with all JDS Labs XMOS based DACs, including Element II, Element III, EL DAC II(+), and Atom DAC(+).

You may install any version of firmware for your DAC; there is no need to install versions sequentially. Version numbers are used for identification purposes only.

We encourage updating through the XMOS DFU app for Windows 10/11. Installing in macOS and Linux is supported by the jdslabs/xmos_dfu loader, which is a command line tool.

WARNING

These tools only check for a valid JDS Labs device before loading firmware to your DAC. The software does not check the .bin file you supply, nor can it check that the DAC matches the .bin file you provide. Thus, triple check that you are loading the right firmware for the right model! In the event that you accidentally load firmware for the wrong JDS Labs DAC, you can possibly recover by flashing the intended firmware. If not, please reach out for help.

General Tips

A direct connection to a USB 2.0/3.0 port is required. USB hubs and some Type C or USB 3.1 ports may prevent DFU communication.
Only connect one (1) JDS Labs DAC at a time.
Your DAC will automatically restart upon completion.
In the rare event that an update fails, it is safe to power cycle. Your DAC will fallback to factory firmware. Please reach out to support if you are unable to upgrade and we will be glad to assist further.

Windows

Instructions for Win 10/11

Begin by installing the latest XMOS Drivers for your DAC if you have not done so already (v5.62.0 for Win 10/11).
Connect your DAC directly to a USB port on your computer. Connecting through a USB hub or USB port on your monitor can prevent the update app from establishing a connection.
Download, unzip, and open the XMOS Firmware Update Utility. This download contains both x64 and x32 versions. Open the appropriate version for your system
Download a new firmware from jdslabs.com. If the file is compressed in a .zip archive, be sure to extract the .zip file to obtain the firmware .bin file.
Click Browse and select the .bin file you have downloaded from jdslabs.com.
Start Start. You should see the version number change upon completion.

Instructions for Win 7/8

Begin by installing the latest XMOS Drivers for your DAC if you have not done so already (v4.13.0 for Win 7/8).
Connect your DAC directly to a USB port on your computer. Connecting through a USB hub or USB port on your monitor can prevent the update app from establishing a connection.
In older XMOS driver v4.13.0, the DFU update is found in the directory where you installed the XMOS drivers, by default:
Element II
C:\Program Files\XMOS\USBAudioStDriver_30DA\W10_x64\xmosusbaudiost30DA_dfuapp.exe
EL DAC II(+)
C:\Program Files\XMOS\USBAudioStDriver_30E0\W10_x64\xmosusbaudiost30E0_dfuapp.exe
Atom DAC(+)
C:\Program Files\XMOS\USBAudioStDriver_30E1\W10_x64\xmosusbaudiost30E1_dfuapp.exe
Click Browse and select the .bin file you have downloaded from jdslabs.com
Start Start. You should see the version number change upon completion.

macOS

Instructions for macOS Big Sur and Monterey

Installing firmware updates is possible in macOS by command line.

Prerequisites

Install XCode Command Line Tools, from a command line: xcode-select --install
Install Homebrew, and be sure to follow the suggestion at the end to add Homebrew to your PATH.
Install libusb: brew install libusb

Loading Firmware in macOS Big Sur

Open Terminal and clone the jdslabs/xmos_dfu firmware utility:
```
git clone https://github.com/jdslabs/xmos_dfu.git
```
Navigate to the cloned directory:
```
cd xmos_dfu/xmos_dfu
```
Run the following command to compile, using the appropriate target for your system. You may ignore the warnings.

Intel based Macs:
```
make -f Makefile mac
```
Apple Silicon M1 based Macs:
```
make -f Makefile mac-m1
```
Obtain permission to run the script by entering these commands:
```
chmod +x setup.sh 
chmod +x xmosdfu 
source setup.sh
```
Make sure your DAC is connected by USB, then run the following command to verify the connection and check the current firmware version. Your DAC will appear as “VID = 0x20b1” or “VID = 0x152A”:
```
./xmosdfu --listdevices
```
To flash new firmware, download a desired .bin, then run the command below. You will need to edit the command to reflect the full path of your downloaded firmware file: select the downloaded file in Finder, then right click on its path in the bottom of the window and choose Copy <filename> as Pathname.
```
sudo ./xmosdfu --download "/replace/this/path/ReplaceThisFirmwareFilename.bin"
```
After a few seconds, your DAC will reboot and you will see the following confirmations:

Linux

Instructions for Ubuntu 20.0.4

Installing firmware updates in Linux is accomplished by command line.