When including audio clips, ensure that the native reading system controls are enabled by default (i.e.,
by setting the controls attribute on the audio element). This practice ensures
that the control are accessible even if scripting is not available. If custom controls are provided and
supported by the reading system, the native controls can be disabled by JavaScript.
Although the audio element allows child content for fallback purposes, such content is not
intended to serve as an accessible alternative. It is only made available to the reader if the
audio element is not supported by the reading system, which typically only occurs in
EPUB 2 reading systems.
The following methods for making audio content accessible are instead recommended in the HTML5 specification:
track element (i.e., using the
chapters track type).video element can be used to
play back the clip synchronously.<audio src="audio/clip01.mp3" controls="controls"/><div>
<audio src="audio/01.mp3" controls="controls"/>
<a href="transcript01.html">Transcript</a>
</div><audio src="audio/clip12.mp3" controls="controls">
<div class="err">
<p>
Sorry, it appears your system
does not support audio playback.
</p>
</div>
</audio>audio elementtrack element