Charles Henry a écrit : > On Tue, Jun 10, 2008 at 4:43 AM, cyrille henry > <[EMAIL PROTECTED]> wrote: > >> i realized that the 4 points interpolation in tabread4~ (and tabosc4~) are >> not optimal. > > Please describe. I've analyze the interpolation formula too, and I > think that it is a true cubic interpolation. Is the numerical > accuracy bad?
well, i think the tabread4~ interpolation is a lagrange interpolator (but i'm may be wrong). at least with tabread4~, the 1st derivative is not continuous, while it should be with a cubic interpolation. i program a cubic interpolation, and the shape of the waveform is really different. please compile the object and look at the help patch to see the difference. i can also send waveforme picture if needed. cyrille > > Chuck > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > _______________________________________________ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
