The descent audio is wind blowing across a mic while the probe is
rotating and also you can clearly hear what might be mechanical
operations of the probe.

The radar audio sounds like a old atari game sounds with bleeps and
chirps. Then the sounds starts a steady low steady tone that increase
in frequency as the probe gets closer to the surface. Soon as the probe
hits the ground the audio stops.

Neither audio file is informative to us on the outside. Those in ESA
and NASA probably can pull a alot of data from these audio files.