What Audio Description Adds To A Program

Audio description is a spoken track conveying what happens on screen for viewers who cannot see it. Its central constraint is that it must fit into the spaces the program leaves.

It fills gaps rather than replacing sound

Description is placed in pauses between dialogue and away from significant sound effects. Speaking over the program would remove information rather than adding it.

Those gaps are short and unevenly distributed. Dense dialogue scenes may offer almost no room, while action sequences offer plenty.

Writing therefore begins with mapping the available space and deciding what fits, which frequently means conveying a complex visual moment in a handful of words.

Selection is the hardest part

Far more happens visually than can be described. The writer must decide what a viewer needs to follow the story and what is decoration.

Priority generally goes to information without which later events make no sense: who is present, where they are, what changed, and on-screen text.

Describing something before the program reveals it spoils the moment. Describing it too late leaves the viewer confused during the scene that depends on it.

The register is deliberately neutral

Description states what is visible rather than interpreting it. Saying a character looks devastated substitutes the writer's reading for the viewer's.

Present tense and plain vocabulary keep it unobtrusive. The aim is that it recedes into the program rather than standing apart from it.

Delivery is similarly restrained. A narrator performing the description competes with the performances in the program.

Delivery formats vary in flexibility

Description may be mixed into an alternate soundtrack the viewer selects, which is simple to deliver and fixed once produced.

It may instead be a separate track the player mixes at playback, which lets the viewer adjust its level relative to the program.

Where gaps are genuinely insufficient, some approaches pause the program briefly to allow a longer description. That works for on-demand viewing and not for live or broadcast.

Provision requirements exist and differ

Rules in the United States require audio description on certain broadcast and distributed programming, with the scope depending on the distributor and the type of content.

The obligations have expanded over time and continue to be revised, so the current position must be checked rather than assumed.

Beyond compliance, description makes a program usable in situations where the screen cannot be watched, which is a larger audience than the requirement contemplates.