The Pulse unit has three internal points for firmware. The display board or MCU is responsible for your Menu, Display, Volume control, and IR port. This can only get updated in-house.

MCU Display



The USB firmware is responsible for the musical data communication. It controls the USB sampling, DSD over PCM, PureDSD and all other music data formats. This can be seen using the Light Harmonic Control Panel.

The Main firmware is the overall architecture for the display, processor, and DAC communication. The only firmware that cannot get updated in the field is the MCU or Display Board.

By using the Device Firmware Update utility or DFU you can flash your Pulse with the latest updates via USB.

Main Display

Our Firmware breakdown table will show you all of our current firmware for all three major points.