After a failed dolphin keyboard experiment, Seth Horowitz decided to change roles from dolphin trainer to biopsychologist, neuroscientist, aural therapist, and author. In this Composer Quest episode, Seth explains how echolocation works, and how he used his knowledge of bats to sound design an alien race for a sci-fi show by the producers of The Walking Dead and Heroes. We also talk about his aural therapy recordings engineered to induce sleep, improve focus, and even relieve pain.