<!DOCTYPE html> <html class="reftest-wait"> <script> var context = new window.AudioContext(); var source = context.createBufferSource(); source.connect(context.destination); source.playbackRate.value = 0.01; source.buffer = context.createBuffer(2, 32, context.sampleRate); source.start(0); setTimeout( function() { source.buffer = context.createBuffer(1, 10, context.sampleRate); source.playbackRate.value = 1; source.onended = function() { document.documentElement.removeAttribute("class"); }; }, 0); </script> </html>