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<!DOCTYPE html>
<head>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<meta content="utf-8" http-equiv="encoding">
</head>
<body>
<pre id=state></pre>
<button id="start" onclick="start_webaudio()">Start</button>
<button id="stop" onclick="stop_webaudio()">Stop</button>
<script type="text/javascript">
var ac = new AudioContext();
var dest = ac.destination;
var osc = ac.createOscillator();
osc.connect(dest);
osc.start();
document.querySelector("pre").innerText = ac.state;
ac.onstatechange = function() {
document.querySelector("pre").innerText = ac.state;
}
function start_webaudio() {
ac.resume();
}
function stop_webaudio() {
ac.suspend();
}
</script>
</body>
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