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[web-audio-api] (setTargetValueAtTime): AudioParam.setTargetValueAtTime is misleading and underdefined (#152)

From: Olivier Thereaux <notifications@github.com>
Date: Wed, 11 Sep 2013 07:28:38 -0700
To: WebAudio/web-audio-api <web-audio-api@noreply.github.com>
Message-ID: <WebAudio/web-audio-api/issues/152@github.com>
> Originally reported on W3C Bugzilla [ISSUE-17334](https://www.w3.org/Bugs/Public/show_bug.cgi?id=17334) Tue, 05 Jun 2012 11:25:34 GMT
> Reported by Philip Jägenstedt
> Assigned to 

Audio-ISSUE-38 (setTargetValueAtTime): AudioParam.setTargetValueAtTime is misleading and underdefined [Web Audio API]


Raised by: Philip Jägenstedt
On product: Web Audio API

The naming of this function is misleading, since it does not in fact set the target value at the given time.

timeConstant is underdefined, what is the exponent? A "first-order filter (exponential)" is mentioned, but not clarified further.

Finally, it is not well defined what the difference to exponentialRampToValueAtTime is, but we suspect that setTargetValueAtTime is something like v=1-e-kt. The equations involving the 3 parameters should be included in the spec, normatively.

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Received on Wednesday, 11 September 2013 14:29:03 UTC

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