To claim Single A conformance, all of your pages and documents must meet all Single A requirements
To claim Double A, all of your pages and documents must meet all Single A and all Double A requirements
To claim Triple A, all of your pages and documents must meet all Single A, Double A and Triple A requirements
Making pre-recorded audio accessible can benefit people with hearing or cognitive disabilties, or for whome english is their second language.
There needs to be an alternative representation of audio-only content, unless the audio file is a media alternative to text and clearly labelled as such.
Because an audio file is not text, it cannot be 'read' by a screen reader. Therefore, it must have a text alternative that serves the same purpose. This alternative must also be identified so people know it is non-text content. This alternative can be
Or, a brief description of the audio, or a descriptive label of the audio and:
People must be able to operate the audio by any input device. Therefore, just providing functionality for the mouse is not enough, although the mouse should be able to access any content on the page. The keyboard must be able to operate the all functionality of the audio including pausing and restarting.
Don't enable autoplay, because the audio file will 'speak' over the top of the screen reader and sound confusing, but if sound is played automatically, the
Also,
The controls to operate the audio should be accessible with a keyboard, and should be visible (highlighted) when they receive focus. Therefore it is best to keep it simple, so
The foreground audio, for example, speech, must be 20 decibels louder that any background noise. This can be achieved during recording or by mixing the audio file to maximise the audibility of forground sound