Stories are a form of communication and communication succeeds by appealing to ones senses. Audio storytelling means getting a message across by solely appealing to the sense of hearing. Moon Graffiti achieved this. It explained itself with words, it used eerie space music to set the tone and mood. They tossed in radio static for realism. Sound gives the sensation of a place even if we cannot see it. When we do see the place, sound adds a unique color to it.