[Webkit-unassigned] [Bug 221334] Audio passed through WebAudio is delayed and glitchy on Safari

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221334

--- Comment #9 from Chris Dumez <cdumez at apple.com> ---
I just tried the car review demo on iOS 14 with AirPods, the audio is initially out-of-sync by <1sec. However, if I request microphone permission, then audio gets louder and starts getting very glitchy. I have no idea why the microphone request permission is having such an impact. Some of the media experts in CC may have an idea.

I have also tried on macOS (with AirPods) and I can indeed reproduce the audio being out of sync by <1sec. Audio is sometimes a little bit glitchy. Requesting microphone permission makes audio louder.

I know this is tagged as WebAudio but this is likely at MediaElementAudioSourceNode (or lower level like AudioSourceProvider) level so assistance from media people would be appreciated.

It does not appear those are recent regression as I can reproduce on older builds, before we refactored WebAudio.

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