NEW 175112
AudioParam.setValueCurveAtTime should use linear interpolation, not nearest neighbor 
https://bugs.webkit.org/show_bug.cgi?id=175112
Summary AudioParam.setValueCurveAtTime should use linear interpolation, not nearest n...
Ricci Adams
Reported 2017-08-02 20:00:39 PDT
Based on testing and a brief code examination of AudioParamTimeline.cpp, AudioParam.setValueCurveAtTime is performing nearest neighbor sampling for missing values, rather than linear interpolation. Per the WebAudio specification, linear interpolation should be used: https://webaudio.github.io/web-audio-api/#widl-AudioParam-setValueCurveAtTime-AudioParam-sequence-float--values-double-startTime-double-duration Chrome 46+ and Firefox use linear interpolation. My test case involved making a Float32 array with 2 values: 1.0 and 0.0. I then used this on a GainNode to perform a fadeout. Expected behavior was a fadeout, actual behavior was immediate silence.
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Radar WebKit Bug Importer
Comment 1 2017-08-02 22:25:24 PDT
<rdar://problem/33693466>
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