Access: [1.1.6.2]: audio missing text transcript (au)
(Priority 1)

Cause:

Web documents that contain audio files must also provide a text transcript that describes the sound or reproduces the content contained in the file. If the audio file contains an extensive amount of information, establish a link within the document that points to a complete text transcript of the sound file. This technique is suitable for reproducing song lyrics and excerpts from speeches.

Testfile:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
	"http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en">
<head>
<title>aert1.0/1.1.6</title>
</head>
<body>
<a href="clap.au">The sound of one hand clapping (au)</a>
</body>
</html>

References:

W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/