[PD] tabread4~ "broken" interpolation algorithm - was Re: Max Smoother Audio than Pd?

[Mathieu Bouchard]

> I checked it out (not read the _whole_ thread to the end) but, In what 
> way can the current tabread4~ interpolation, which is discontinuous even 
> in its 1st derivative, be superior to true cubic interpolation? Even at 
> transpositions near to zero, I can't see what's the advantage, nor what 
> it is supposed to minimize.

both are truly cubic interpolations.

IIRC, one kind of cubic interpolation is designed to go through all four 
points, and the other kind is designed to be pieced with other cubic 
interpolations, and Miller confused the two and left the bug there.

  _ _ __ ___ _____ ________ _____________ _____________________ ...
| Mathieu Bouchard, Montréal, Québec. téléphone: +1.514.383.3801