[Webkit-unassigned] [Bug 190644] onaudioprocess Occasionally Has Buffers With Zeroes as Data

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190644

--- Comment #5 from Jer Noble <jer.noble at apple.com> ---
So first things first, I see that you're using a ScriptProcessorNode to pull data out of the AnalyserNode. This is going to be incredibly inefficient. The entire purpose of the AnalyserNode is to collect frequency information and make it available outside of the high-priority audio thread.  You're also using a SPN to draw to canvas! That's crazy pants!  Both of these things are the kind of thing you should be doing in a requestAnimationFrame() callback.  By adding a ScriptProcessorNode, you're degrading the performance of the entire audio graph, and you're making upstream nodes susceptible to main thread starvation and drop-outs.  First, try eliminating the ScriptProcessorNodes from Recorder.js; I think that might solve your mic dropouts.

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