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

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Oct 4 13:48:29 PDT 2021


Takahiro Aoyagi <taoyagi at mozilla.com> changed:

           What    |Removed                     |Added
                 CC|                            |taoyagi at mozilla.com

--- Comment #11 from Takahiro Aoyagi <taoyagi at mozilla.com> ---
> I have tried https://takahirox.github.io/ios-webaudio-test/ with WebAudio (with createBufferSource()) on iOS 15 (iPhone) and could not reproduce after playing for several minutes. No issue on macOS Monterey either.

To clarify, I noticed (at least) three audio problems.

1. WebAudio createMediaElementSource() audio noise problem. Audio which is made with WebAudio createMediaElementSource() can cause noise. https://takahirox.github.io/ios-webaudio-test/ is the test to check it. I faced this problem on my iPhoneX iOS 14.8 Safari, but the problem seems to have been resolved in iOS 15.

2. WebAudio PannerNode distorted audio problem. As Brian and others mentioned, PannerNode causes distorted audio after a few minutes. This problem doesn't seem to have been resolved yet even in iOS 15. You can reproduce the problem on a Three.js example https://threejs.org/examples/#webaudio_orientation Sounds like https://bugs.webkit.org/show_bug.cgi?id=230950 can resolve the problem. I will update my iOS and test again.

3. Audio of video media (and others?) is crackling if you get user media with echo cancellation option. It seems this problem is reproducible only on old or low-end models. I opened the issue https://bugs.webkit.org/show_bug.cgi?id=231191 please refer to it for the details.

And one more issue. Our member reported audio can cause noise on his iPhoneSE2 iOS 15 Safari. https://github.com/mozilla/hubs/issues/4411#issuecomment-933539778 We couldn't find the root issue yet but I have an impression that noise can happen especially if CPU usage is high (or other resources, eg. memory, is consumed a lot). I'm not really sure yet whether it is another problem or related to 2 or 3 above.

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