Optional accessible audio lab
This original sound has two gentle tones, first lower and then higher. Listening is optional. It contains no speech, and its full information is also written below.
Text alternative
A short lower-pitched tone sounds, there is a pause, and then a short higher-pitched tone sounds. No other information is conveyed.
How the markup works
<audio controls preload="none">
<source src="two-tones.wav" type="audio/wav">
<a href="two-tones.wav">Download the two-tone WAV example</a>.
</audio>controls asks the browser to provide native play, pause, and volume controls. preload="none" asks it not to preload the media; the browser may apply its own loading policy. The source identifies the file and media type. There is no autoplay. A transcript for real speech would reproduce the spoken meaning and relevant sounds. This small example is not a substitute for a captioned video lesson.