Audio dramas (and their forerunners, radio plays) have always incorporated sound effects. Usually these effects were just embellishments to help set the mood. In contrast, ADX sound design is an integral part of storytelling. Far from mere decoration, the soundscape of an ADX is vast and deep, with many layers of sounds. Stand in a city and close your eyes; what do you hear? Traffic, people walking and talking, an occasional distant siren or car alarm, wind, an approaching bus, hurried footsteps, the sound of someone dropping a coin as they squeeze through the sliding doors and up the steps. In fact, there can be entire ADX scenes that have no dialogue at all. The story is in the sound. The sound is the story.