<!DOCTYPE html>
<html class="reftest-wait">
<script>
var context = new AudioContext();

var source = context.createBufferSource();
source.buffer = context.createBuffer(1, 2.0 * context.sampleRate, context.sampleRate);
source.onended = function(e) {
  document.documentElement.removeAttribute("class");
}
source.start(0.0, 1.0);
setTimeout(
    function() {
        source.buffer = context.createBuffer(1, 1, context.sampleRate);
    }, 0);
</script>
