Recent updates have focused on resolving "crackling" audio issues and improving the device's performance as a USB DAC for PC and Android. Step-by-Step Update Procedure
Here is a historical changelog compiled from FAudio release notes (based on common updates): faudio fa4 firmware upd
warn that it is intended for a rebranded "LIMETECC" version of the device. Installing this on a standard F.Audio FA4 Recent updates have focused on resolving "crackling" audio