Perceivable / 1.2 Time-based Media
1.2.9Audio-only (Live)
Level AAAProvide a text alternative, such as real-time captions, conveying the content of live radio or audio-only live streams. Unlike 1.2.4, which covers live video with audio, this Level AAA criterion targets audio-only live content specifically.
Note
A detailed commentary for this success criterion is not yet available. In the meantime, this page lists related patterns, techniques, and links to the normative sources.
Related Techniques
Specific implementation techniques for meeting this success criterion. This site doesn't include the full text, so follow the links to the original W3C documents.
Sufficient Techniques(3)
- G150: Providing text based alternatives for live audio-only content(opens in a new tab)waic.jp(opens in a new tab)
- G151: Providing a link to a text transcript of a prepared statement or script if the script is followed(opens in a new tab)waic.jp(opens in a new tab)
- G157: Incorporating a live audio captioning service into a web page(opens in a new tab)waic.jp(opens in a new tab)
Normative References
- Success Criterion 1.2.9 Audio-only (Live) — WCAG 2.2(opens in a new tab)The normative requirement text.
- Understanding Audio-only (Live) — W3C(opens in a new tab)Official guidance on intent, examples, and techniques.