The   Media Working Group   has published the First Public Working Draft of   Audio Session . This API defines an API surface for controlling how audio is rendered and interacts with other audio playing applications, allowing for better audio mixing or exclusive playback, depending on the context, to provide a more consistent and integrated media experience across devices.

  The   Media Working Group   has published a First Public Working Draft of   Autoplay Policy Detection . This specification provides web developers the ability to detect if automatically starting the playback of a media file is allowed in different situations. The Working Group welcomes comments via the  GitHub repository issues .

  The  Media Working Group  has published a First Public Working Draft of  Media Source Extensions™ . This specification extends  HTMLMediaElement  [ HTML ] to allow JavaScript to generate media streams for playback. Allowing JavaScript to generate streams facilitates a variety of use cases like adaptive streaming and time shifting live streams.