Audio & Video tracks + audioSession

[stubbornella]

Description

This proposal includes 3 APIs

• The audioTracks and videoTracks APIs for media elements switch audio and video tracks during playback.
• The navigator.audioSession API controls how audio playback interacts with other applications. For example, playing music can pause audio from other applications, while ambient audio can play at the same time.

Specification

https://w3c.github.io/audio-session/

Additional Signals

No response

[gsnedders]

https://wpt.fyi/results/media-source?label=master&label=experimental&aligned&q=mediasource-avtracks.html%20or%20mediasource-activesourcebuffers.html seem to cover the first two, and I can't see any WPT tests for the last?