<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<button onclick="accelerate()">加速</button>
<button onclick="playVideo()">播放</button>
<button onclick="slow()">减速</button>
<script>
var src = 'https://m801.music.126.net/20190516150553/1e0321bcf7046f8052a43eedc978e33a/jdyyaac/005f/0f5b/030b/751fc2b41b81fa17dac24a81e2934c2f.m4a';
var myVid=document.createElement('audio');
console.log(myVid)
myVid.autoplay = true;
myVid.src = src;
myVid.playbackRate=0.5;
function accelerate(){
myVid.playbackRate = myVid.playbackRate + 0.1
console.log(myVid.playbackRate)
}
function slow() {
myVid.playbackRate = myVid.playbackRate - 0.1
console.log(myVid.playbackRate)
}
function playVideo() {
myVid.play();
}
</script>
</body>
</html>