Claude Heiland-Allen a écrit :
Alexandre Porres wrote:
"I feel Max produce a smoother audio than Pd. Didit"
Well, if you use [tabread4~] or any of the many other Pd objects that use the same broken interpolation algorithm (copy/paste programming), you get horrible noise. If you use [tabread4] to interpolate graphical parameters for animations, the discontinuities in the derivatives are really obvious.
See attached patch - it would be interesting to see if a Max/MSP port of this patch exhibits the same problem.
well, the cos~ object does not internally use a 4 points interpolation. see code : *out++ = f1 + frac * (f2 - f1); it's a 2 points linear interpolation.
nusmuk audio tabread4c~ uses the correct interpolation algorithm, correct me if I'm wrong.
i don't think there is a correct interpolation algorythm. I heard that software like reaktor use very diferent algorythm, with lot's more points, in order to have a band limited interpolation.
cyrille
See also this long discussion: http://lists.puredata.info/pipermail/pd-list/2008-06/062878.html
Claude
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