According to WCAG 2.0 guidelines, captions are similar to dialogue-only subtitles. Captions convey not only the content of spoken dialogue, but also non-dialogue audio information needed to understand content. Non-dialogue audio includes sound effects, music, laughter, speaker identification and location. Therefore, any meaningful words or sounds will have to be captioned.
Non-vocal sounds that convey meaning, such as music or sound effects, may be objectively described to help viewers understand the content. For example, an orchestral suite may be captioned as “calm melody with a slow tempo”.
In short, send your video in for captioning if it is required for student viewing and contains the following:
When in doubt, please contact your eLearning Instructional Designer.