[Webkit-unassigned] [Bug 204228] New: HTMLAudioElement currentTime out of sync with actual audio when linked to AudioContext

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204228

            Bug ID: 204228
           Summary: HTMLAudioElement currentTime out of sync with actual
                    audio when linked to AudioContext
           Product: WebKit
           Version: Safari 13
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Audio
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sam at msgbox.me

It seems that when an HTMLAudioElement is linked up to AudioContext (via createMediaElementSource), the audio element's currentTime is out of sync with playback.

Steps to reproduce:

1. Go to https://codesandbox.io/s/safari-time-delay-9hokn
2. Click the play button in the audio control, confirm that the tones occur exactly on the second
3. Reload the page
4. Click the “Connect to AudioContext” button
5. Click the play button

You'll then see that the timing is off. This doesn't occur in Chrome nor Firefox.

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