[Bug 17404] (OscillatorFolding): Oscillator folding considerations

https://www.w3.org/Bugs/Public/show_bug.cgi?id=17404

--- Comment #5 from Marcus Geelnard (Opera) <mage@opera.com> ---
> 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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