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Re: [web-audio-api] (OscillatorFolding): Oscillator folding considerations (#127)

From: Olivier Thereaux <notifications@github.com>
Date: Wed, 11 Sep 2013 07:29:45 -0700
To: WebAudio/web-audio-api <web-audio-api@noreply.github.com>
Message-ID: <WebAudio/web-audio-api/issues/127/24244378@github.com>
> [Original comment](https://www.w3.org/Bugs/Public/show_bug.cgi?id=17404#4) by Marcus Geelnard (Opera) on W3C Bugzilla. Tue, 16 Oct 2012 12:39:10 GMT

> But, I consider it ok for a basic implementation, especially if
> it's used as a performance optimization for low-end hardware.

My main concern here is the wording in the spec. As it is now, the only "must" in the text is used in conjunction with a sections that *seems* to be non-normative. If interpreted as a normative statement (which would currently be a correct interpretation of the spec), an implementation MUST filter out frequencies above the Nyquist frequency.

Suggestion: Make the first part of section 2.23 non-normative (the text before "Both .frequency and .detune are a-rate parameters..."), and drop the "must" from the sentence "care must be taken to discard (filter out) the high-frequency information".

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Reply to this email directly or view it on GitHub:
https://github.com/WebAudio/web-audio-api/issues/127#issuecomment-24244378
Received on Wednesday, 11 September 2013 14:30:36 UTC

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