Subject: Re: [linux-audio-dev] Dithering idiots
From: rm (async_AT_cc.gatech.edu)
Date: Mon Jun 17 2002 - 16:44:34 EEST
On Mon, Jun 17, 2002 at 02:27:29PM +0100, Richard Bown wrote:
> Steve Harris wrote:
>
> > Right, I misread the question, but my PS point is appropriate. In order to
> > find the amplitude at a given, fractional sample point you should be using
> > sinc interpolation.
>
> There appears to be plenty of references to sinc interpolation on the web
> but are there any decent implementations lying around that I could learn
> from?
>
> And I s'pose a bigger question is "why is it this way" ?
it's from sampling theory:
http://www-ccrma.stanford.edu/~jos/mdft/Reconstruction_Samples_The_Math.html
>
> And where does "peak data" come into things then? Are those peak files that
> an audio app produces the stored result of this interpolation or is that
> something different? And if so, again, why?
----
Robert Melby
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp: ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gt4255a
Internet: async_AT_cc.gatech.edu
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