The document discusses various auditory elements in a radio drama including pitch, cultural codes, generic verisimilitude, texture, and formality. It notes that pitch varies from low to high between characters, with a low pitch used for more serious parts and a high pitch used for comedic parts. Cultural codes like accent and dialect are used, with the accent becoming more informal in parts. Signifiers of comedy like made up words and an informal style are used to convey the generic verisimilitude of comedy. The texture of voices changes between characters, from rough and low pitched to smooth and high pitched. The language becomes less formal as different characters are introduced.