Cobalah sendiri - JavaScript Reference audio

<!DOCTYPE html>
<html>
<body>

<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><br>

<button onclick="getPlaySpeed()" type="button">What is the default playback speed?</button>
<button onclick="setPlaySpeed()" type="button">Set video to be play in slow motion</button>

<script>
var x = document.getElementById("myAudio");
function getPlaySpeed() {
   alert(x.defaultPlaybackRate);
}

function setPlaySpeed() {
   x.defaultPlaybackRate = 0.5;
   x.load();
}
</script>

</body>
</html>