To update the ToneMatch audio engine firmware, follow these steps:
Updating firmware
Applies to:
- Connect the mixer to a power source (ToneMatch power supply for T4S/T8S or an L1 Model 1S/II for T4S only).
 - Plug one end of the USB cable into the mixer’s USB 2.0 Type-B port.
 - Plug the other end of the USB cable into a USB port on your computer.
 - Turn on the mixer.
 - Open the ToneMatch Updater application
 - Follow the instructions in the updater software program.
 
ToneMatch Updater application. (two versions available)
v2.1 for windows
v2.1 for macOS