Thank you for posting the audio.
Subsequent news reports say the flight diverted to KHSP due to an emergency, but there was no mention of that or any queries from the controller about anything, so I wonder if that was true, or if Hot Springs was really the final destination all along. It seems like, if there really was an emergency, they would have chosen to divert to Roanoke, or even Charlotte where they started their descent, so I wonder... As usual, we will have to wait for the NTSB report to really know anything.
Edit: Later news reports clarified that Hot Springs was the intended destination, and there was no emergency.
My heart goes out to the families of the 5 people on board.