[Webkit-unassigned] [Bug 255209] New: Safari not calling external audio

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255209

            Bug ID: 255209
           Summary: Safari not calling external audio
           Product: WebKit
           Version: Safari 16
          Hardware: Mac (Apple Silicon)
                OS: iOS 16
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: renee at altaicasting.com
                CC: youennf at gmail.com

When running broadcasting stream using webRTC in Safari, the external Audio Device will not broadcast audio. 

To reproduce:
In Safari 16.4 on webRTC when audio input is changed to external audio sources - (getUserMedia) is not getting the stream.

What we tried:
Google Meet WebRTC initially did not recognise the stream when audio input changed, however after 30 seconds the audio is recognised, albeit delayed. Audio syncs at the 1 minute mark.
Same device tested in Chrome without issue.

Devices:
MacBook M1 Pro
Ventura 13.3 
Safari 16.4
External device: Canon XA20 for Video/Audio connected via Yuan PD570 Pro Capture HDMI - A/V to USB capture device https://www.yuan.com.tw/products/capture/external/pd570_pro_hdmi.htm

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