<!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>