The audio board hosts a firmware image which implements DSP and user interface functions.
On powerup, the audio board firmware version is the 2nd of the two version numbers in the VERSION splash screen.
For example, if VERSION is shown as "6.2/6.0" the audio board firmware is "6.0".

There are 2 audio board firmware branches, depending on the hardware configuration.

The radio board hosts a firmware image which implements frequency control functions.
On powerup, the radio board firmware version is the 1st of the two version numbers in the VERSION splash screen.
For example, if VERSION is shown as "6.2/6.0" the radio board firmware is "6.2".