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WCAG 1.2.9: Audio-only (Live) (Level AAA)

What if you couldn’t turn up the volume for a live audio stream? Whether it’s due to hearing loss or a noisy environment, audio-only content can be inaccessible.

Audio-only (Live) addresses this by ensuring there’s always a text option for those who can’t—or prefer not to—listen.

Who this impacts

  • People who are deaf or hard of hearing: They rely on real-time text to access live audio content.
  • People who process information better visually: Some people find it easier to read along than to listen.
  • Situations where audio can’t be played: Text options allow access in places where sound isn’t practical.

How to meet Audio-only (Live)

  1. Provide real-time text transcription: Use live captioning or transcription services to provide an accurate text version of the audio content.
  2. Ensure the text is in sync with the audio: The transcription should be displayed with minimal delay to keep up with the live broadcast.
  3. Place the transcription in an easy-to-read format: Use a font size and color that ensures readability, even from a distance.
  4. Consider professional transcription services: Automated services can help, but human transcribers offer higher accuracy.

Top tips

  • Hire experienced transcribers for important events: Human transcribers provide better quality than automated systems.
  • Use plain language: Keep the transcription accessible by avoiding overly complex terms.
  • Provide options for adjusting text size and contrast: This helps make the text easier to read for everyone.
  • Offer a recording of the text after the event: Making the transcription available later allows people to revisit the content.

Further reading

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