Coming from a movie background, I look at podcasts in a similar way. With film, you always have a visual that can take the attention from any audio shortcomings; you don't get that with podcasts. Casefile True Crime is all about ambience and setting the mood.
The top audio challenge is to balance the music and the voice of our anonymous host to help the listener immerse in the story. I address it with a selection of iZotope tools. RX 6 is my go-to solution, and I also use Neutron, Alloy 2, and Ozone 7 to create the best sounding experience I can. The podcast is still being recorded in a spare bedroom somewhere in Australia, and there are a lot of challenges that come with that such as background noise, barking dogs, and neighbors. It's safe to say that without iZotope I would be lost!
My setup is based on templates: I run various presets and modules that after eighteen months are adjusted to the microphone, the voice, and the environment in which the Host records the podcast. Still, each episode presents a new challenge, and I try to improve the templates every time.
I view podcasting as an intimate medium: once you put on the headphones and it’s just you and the story, it's crucial to make the experience as good as possible. Audio is tricky—you often only notice it when there’s something wrong. The minute listeners ask for more episodes, then I know we’re doing a good job.