(function () {
  function neuter(proto) {
    if (!proto) return;
    proto.createBufferSource = function () {
      return { connect: function () {}, disconnect: function () {}, start: function () {}, stop: function () {}, buffer: null };
    };
  }
  neuter(window.AudioContext && window.AudioContext.prototype);
  neuter(window.webkitAudioContext && window.webkitAudioContext.prototype);
  window.playAudio = function () { return Promise.resolve(); };
})();