Why is the sound distorted on episode nine of The Whisperer in Darkness?

BBC Radio 4 | Update

The audio of episode nine of Radio 4's The Lovecraft Investigations: The Whisperer in Darkness is intentionally distorted to add to the theme of corruption and sense of mystery of the podcast.

Episode ten references the audio distortion heard in episode nine. 

The podcast title for this episode also appears with the wrong episode number. Again, this is a decision made by the programme team to add to the theme of corruption. 

Programme image of Whisperer in Darkness showing a woman wearing a red scarf in the woods with an orange and red background