Hello,

Contact emails
sung...@microsoft.com<mailto:sung...@microsoft.com>, 
stev...@microsoft.com<mailto:stev...@microsoft.com>

Explainer
https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/SetPreferredSinkId/explainer.md

Specification
https://docs.google.com/document/d/1xVn0VwLa8w7jwXl6aeOfYn0mYK7zEc4pSmHelHAbi2g/edit?usp=sharing

Design docs

https://docs.google.com/document/d/1xVn0VwLa8w7jwXl6aeOfYn0mYK7zEc4pSmHelHAbi2g/edit?usp=sharing

Summary
This feature adds setDefaultSinkId() to MediaDevices, which enables the 
top-level frame to change the default audio output device used by its subframes.


Blink component
Blink>AudioOutputDevices<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EAudioOutputDevices%22>

TAG review
None

TAG review status
Pending

Origin Trial documentation link
https://github.com/MicrosoftEdge/MSEdgeExplainers/tree/main/SetPreferredSinkId

Risks


Interoperability and Compatibility
None


Gecko: No signal

WebKit: No signal

Web developers: No signals

Other signals: We have partners interested in the API.

WebView application risks
Does this intent deprecate or change behavior of existing APIs, such that it 
has potentially high risk for Android WebView-based applications?
None


Goals for experimentation


Ongoing technical constraints
None


Debuggability
None


Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, 
ChromeOS, Android, and Android WebView)?
Yes

Is this feature fully tested by 
web-platform-tests<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
No
It will be tested in wpt


DevTrial instructions
https://docs.google.com/document/d/1XAUj09z56dYPapg559eU3SbvNe0IS2_J-K9MVZ--xS8/edit?usp=sharing

Flag name on about://flags
None

Finch feature name
PreferredAudioOutputDevices

Requires code in //chrome?
False

Estimated milestones
Origin trial desktop first
135
Origin trial desktop last
141
DevTrial on desktop
133
Origin trial Android first
135
Origin trial Android last
141


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5098834847072256

Links to previous Intent discussions
Intent to Prototype: 
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/SA2PR00MB09884AC97A430070824E06ECA2102%40SA2PR00MB0988.namprd00.prod.outlook.com


This intent message was generated by Chrome Platform 
Status<https://chromestatus.com/>.


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