[Webkit-unassigned] [Bug 210231] New: No support for stereo audio streams with getUserMedia. No "channelCount" constraint

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=210231

            Bug ID: 210231
           Summary: No support for stereo audio streams with getUserMedia.
                    No "channelCount" constraint
           Product: WebKit
           Version: Safari 13
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sam at inov.com.au
                CC: youennf at gmail.com

Two issues are presented when using multichannel audio devices with a getUserMedia request. 

1. getUserMedia is not supporting the "channelCount" constraint so a request for 2 channels can not be made.
2. If a stereo source is selected the media requests defaults to 1 channel and only takes the Left channel and does not sum Left and Right channels together.

The ability to have stereo audio streams is crucial to being able to broadcast live broadcasts with premium audio quality and webRTC.

https://w3c.github.io/mediacapture-main/#dom-mediadevices-getusermedia

I have attempted with the current work around to disable "echoCancelation" via the "applyConstraints" method. Which does disable the echoCancelation however this will still not produce a stereo audio stream from a stereo media device.

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