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

[cyrille henry]

Matteo Sisti Sette a écrit :
> By the way tabread4c~ is not in Pd Extended, is it?
no. 
it is there : 
http://www.chnry.net/ch/?083-Nusmuk-audio

c

> 
> Roman Haefeli escribió:
>> On Mon, 2010-03-29 at 13:49 +0200, Matteo Sisti Sette wrote:
>>
>>> Claude wrote:
>>>  > If you use [tabread4] to interpolate graphical
>>>  > parameters for animations, the discontinuities in the derivatives are
>>>  > really obvious.
>>> [....]
>>>  > But IMHO if you're doing piecewise cubic interpolation, it's a bit
>>>  > of a nonsense to have a cubic that goes through all 4 points when
>>>  > it's only being used between the inner-most 2 points
>>>
>>> Well using 4 points to interpolate the curve that goes between the 
>>> two inner points should guarantee the absence of discontinuities in 
>>> the first (and second?) derivative; that should be the purpose. Now 
>>> if there actually are discontinuities then there must be some trivial 
>>> error in the equation,  no????
>>>
>>> Or am I missing something???
>>
>> Check this thread:
>> http://lists.puredata.info/pipermail/pd-list/2008-06/062878.html
>>
>> Roman
>>
>>
> 
>