How are sound effects and music identified in captioning program?

How are sound effects and music identified in captioning program?

 

Descriptions of non-verbal sound effects and music can greatly enhance the narrative of a captioned program. Because these are not words contained in the audio, they are generally distinguished by brackets or parentheses. Sound-effect captions can also indicate the source of a sound or describe the way in which something is spoken by its placement in front of regular captioned text.