A.4 WCAG 2.1 Success Criterion 1.2.9 − Audio-only (Live)
For live audio, offer an alternative that contains equivalent information. For example, make speech notes available if a speech is being delivered.
Before Rectification
This live presentation is not accessible to people beset with hearing impairment.
After Rectification
The image above shows that a simple link directing users to the speech notes means that all users can access this content.
WCAG 2.1 Reference:
https://www.w3.org/WAI/WCAG21/Understanding/audio-only-live