WCAG 3.0 is an active W3C Working Draft in development by the AGWG. Requirements, assertions, the conformance model and reporting tiers are still being developed and may change. The latest published draft is the 10 September 2026 Working Draft; this site follows the editorsโ draft, which also includes exploratory provisions.
developingCore requirement
Sounds Identified In Transcripts
Group: images-and-media • Guideline: transcripts
Summary in Plain English
Where sound carries meaning and the video is not decorative, the transcript records what the sound was, alongside the dialogue.
Why It Matters
For a reader who never hears the audio, an unmarked sound is simply an event that did not happen.
Sounds needed to understand the media are identified or described in transcripts.
:::ednote
This includes sound effects and other non-spoken audio content.
:::
:::applies-when
- there is sound.
:::
:::except-when
- the video is decorative.
:::