204228 2019-11-15 09:16:10 -0800 HTMLAudioElement currentTime out of sync with actual audio when linked to AudioContext 2022-05-18 02:00:03 -0700 1 1 1 Unclassified WebKit Web Audio Safari 13 Mac macOS 10.14 NEW InRadar P2 Normal --- 1 sam webkit-unassigned brianpeiris chrisguttandin tero thomas.blackmon webkit-bug-importer oldest_to_newest 1590524 0 sam 2019-11-15 09:16:10 -0800 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. 1591751 1 webkit-bug-importer 2019-11-19 16:22:00 -0800 <rdar://problem/57341556> 1601044 2 brianpeiris 2019-12-20 17:43:31 -0800 We're running into this problem on https://hubs.mozilla.com/ with videos as well. We use createMediaElementSource to implement 3D positional audio in our WebGL app. I've adapted Sam's test to demonstrate the bug with videos as well, where the delay is much more prominent. https://brianpeiris.github.io/safari-video-source-test/ I reproduce on a 2018 13-inch MacBook Pro, with macOS 10.14.6 and Safari 13.0.4. 1812556 3 tero 2021-11-08 01:33:18 -0800 This is still an issue. Tested on Safari 15.1 on Monterey, and iOS 15.0.2.