NEW 169849
Web Audio ScriptProcessorNode pauses, emits hum after switching audio output device 
https://bugs.webkit.org/show_bug.cgi?id=169849
Summary Web Audio ScriptProcessorNode pauses, emits hum after switching audio output ...
Brooke Vibber
Reported 2017-03-18 12:28:09 PDT
We're using Web Audio's ScriptProcessorNode to play audio files that have been decoded in JavaScript dynamically; it works quite well except when the audio output device is changed during playback. On my MacBook Pro running macOS 10.12.3, I can reproduce this by plugging or unplugging a USB speaker during playback; both directions produce similar results: * audio stops on the old device * on the new device, a humming noise may be emitted * audioprocessing events are no longer delivered When switching back to the original output device, audioprocessing events continue being delivered, and audio continues as expected. Simplified test case: https://brionv.com/misc/audio.html Same results with Safari 10 release version, Technical Preview, and WebKit Nightly.
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Radar WebKit Bug Importer
Comment 1 2017-03-19 13:47:25 PDT
<rdar://problem/31137513>
Jer Noble
Comment 2 2017-03-19 20:26:31 PDT
This sounds suspiciously like a bug we fixed in iOS last year; I must have done it in a platform specific area of the Web Audio code. Should be relatively easy to port over.
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