<!DOCTYPE html>
<html class="reftest-wait">
<script>
function createContext() {
  var context = new window.AudioContext();
  var source = context.createOscillator();
  source.onended = function(e) {
    document.documentElement.removeAttribute("class");
  };
  source.connect(context.destination);
  source.start(0.49);
  source.stop(0.5);
}
createContext();
</script>
