125031 2013-11-30 11:44:28 -0800 No audioprocess event or byte frequency data when using HTML5 audio via createMediaElementSource() 2018-10-02 13:42:25 -0700 1 1 1 Unclassified WebKit Web Audio 528+ (Nightly build) Mac OS X 10.9 RESOLVED DUPLICATE 135042 P2 Normal --- 1 bugs webkit-unassigned cheron.leo crogers cwilso jer.noble lepinski mail t.decaux ultravistor webkitbugzilla oldest_to_newest 955078 0 bugs 2013-11-30 11:44:28 -0800 Purpose: Attempting to use Web Audio API to get data for visualization during playback of an HTML5 <audio> element. Observed: 'audioprocess' event does not fire (demo 1), getByteFrequencyData() returns array of zeroes (demo 2.) Demo 1: AudioContext() + createMediaElementSource() + createScriptProcessor() → audioprocess event http://isflashdeadyet.com/tests/web-audio-visualization/ Demo 2: AudioContext() + createMediaElementSource() + createAnalyser() / getByteFrequencyData() method http://isflashdeadyet.com/tests/web-audio-visualization/index-analyser.html 1039507 1 ultravistor 2014-10-04 09:50:44 -0700 It seems that createMediaElementSource() is actually not implemented (correct me if wrong). The method is there; we can call it w/o error, but it doesn't filter/analyze/produce actual sound if the audio is routed through this node. (Sounds come from media element even the method is not working, which makes it error-prone) would love to hear the plan. * Btw many documentations (including apple dev guide) mention it as usable function, Dev guide: https://developer.apple.com/library/safari/documentation/audiovideo/conceptual/using_html5_audio_video/PlayingandSynthesizingSounds/PlayingandSynthesizingSounds.html MDN: https://developer.mozilla.org/ja/docs/Web/API/AudioContext.createMediaElementSource 1047388 2 ultravistor 2014-11-09 07:11:51 -0800 Hello, is anyone paying attention to this issue? As a user/developer, use case of createMediaElementSource() was clear: visualise audio data (in iOS Safari). Since it's not working now, the application needs to download all the audio file first and execute decodeAudioData(), or cache spectrum data per audio file. Both appears not to be so smart/straightforward approach. 1056638 3 webkitbugzilla 2014-12-17 17:11:13 -0800 It would be awesome if this worked. I hope someone up there gets the time to look into it. Thanks 1056868 4 cwilso 2014-12-18 12:35:18 -0800 I believe this is essentially the same as http://crbug.com/419446. 1082352 5 jer.noble 2015-04-02 15:16:50 -0700 Dup of bug #135042. *** This bug has been marked as a duplicate of bug 135042 *** 1082355 6 jer.noble 2015-04-02 15:18:10 -0700 Please try this against a WebKit nightly build on Mac OS X Yosemite. 1465746 7 t.decaux 2018-10-02 13:42:25 -0700 It seems Safari 12 is still not working with the simple demo: "analyzer is not working with MediaElementAudioSourceNode, but it's working fine with AudioBufferSourceNode".