Microsoft today detailed the Web Audio implementation in Microsoft Edge web browser. Web Audio provides tight time synchronization not possible with HTML5 Audio Elements, and includes audio filters and effects. Also, it includes Web Audio support for live audio streams using Media Capture and getUserMedia, and also works with an updated HTML5 Audio Element capable of gapless looping.
Web Audio is specified in the W3C Web Audio Specification, and continues to evolve under the guidance of the W3C Audio Working Group. This release adds Microsoft Edge to the list of browsers that support Web Audio today, and establishes the specification as a broadly supported, and substantially interoperable web spec.
Read more about it here.