Once the hook was in place, the automation script grabbed window.as.el, muted it, slammed the playback rate to 16 (can’t go faster since that is the maximum supported by browsers), and sat back as the browser frantically decoded and fed chunks into the collection array. When the ended event fired, the chunks were stitched together with new Blob() and downloaded as an .m4a file.
// Async — when source or transforms may be asynchronous
，详情可参考同城约会
（九）接到要求制止违反治安管理行为的报警后，不及时出警的；，这一点在下载安装 谷歌浏览器 开启极速安全的 上网之旅。中也有详细论述
// process chunks