[Webkit-unassigned] [Bug 227199] Progressively worsening crackling / distortion under high load (Resonance Audio + Augmented Reality)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=227199

--- Comment #12 from Chris Dumez <cdumez at apple.com> ---
(In reply to Brian Peiris from comment #2)
> I'm confirming this issue in Safari 14.1.1 on both iOS 14.6 (iPhone 11) and
> macOS 11.4 (MacBook Air M1 2020).
>  
> The issue can be reproduced with a simpler WebAudio test and does not
> require high load or WebGL content. All you need is a spatial PannerNode
> that updates its position and orientation continuously. Here is a simplified
> demo: https://brianpeiris.github.io/spatial-audio-test/
> 
> The demo shows that the issue occurs even if you use ramped transform
> changes with an AudioParam (linearRampToValueAtTime) or with instantaneous
> transform changes (setPosition and setOrientation).
> 
> The issue reproduces faster with instantaneous changes, and it reproduces at
> different rates in different Safari browsers. I've found that it takes ~50
> minutes of playback to reproduce in Safari Technology Preview (15.0) using
> ramped transform changes, but only a few minutes with instantaneous
> transform changes. Safari 14.1.1 reproduces in 15 minutes with ramped
> transforms, and a few minutes with instantaneous transforms. Safari 14.1.1
> on iOS reproduces within a minute in either method.
> 
> The issue does not reproduce in Firefox or Chrome on the same MacBook.

Thank you for the reduced test case. I am able to reproduce with this test case on shipping Safari 15. However, it no longer reproduces on WebKit trunk. It is almost certainly the same issue as Bug 230950, which I have fixed a few days ago.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20211004/3a96afa6/attachment.htm>