<html>
    <head>
        <script>
            function pageLoaded() {
                // Speed up the audio 3x so the test doesn't take 10 seconds.
                var audio = document.getElementById("audio");
                audio.playbackRate = 3;
                audio.play();
            }
        </script>
    </head>
    <body onload="pageLoaded()">
        <audio id="audio" src="silence-long.m4a" />
    </body>
</html>