<!DOCTYPE html>
<html>
<body>
<h3>A demonstration of how to access a AUDIO element</h3>
<audio id="myAudio" controls>
<source src="horse.ogg" type="audio/ogg">
<source src="horse.mp3" type="audio/mpeg">
Your browser does not support the audio element.
</audio>
<p>Click the button to get the duration of the audio, in seconds.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myAudio").duration;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>