Maybe I'm opening a can of worms, but I could imagine tabread etc taking an argument to specify which algorithm to use among a (small) list of those available. The current algorithm would be the default so as not to break existing patches. :)
I'm no expert, but if there are a known set of tried-and-true approaches, maybe they could added through a simple API. This is sort of how I refactored the soundfile type handling in the (as yet unmerged) soundfile object update branch: https://github.com/pure-data/pure-data/blob/0061a083e85ba2548668825b693a72fdf98ceef3/src/d_soundfile.h#L47 <https://github.com/pure-data/pure-data/blob/0061a083e85ba2548668825b693a72fdf98ceef3/src/d_soundfile.h#L47> > On May 3, 2021, at 3:37 PM, pd-list-requ...@lists.iem.at wrote: > > Message: 2 > Date: Mon, 3 May 2021 15:24:10 +0200 > From: Clemens Wegener <clemens@chair.audio <mailto:clemens@chair.audio>> > To: Charles Z Henry <czhe...@gmail.com <mailto:czhe...@gmail.com>> > Cc: Pd-List <pd-list@lists.iem.at <mailto:pd-list@lists.iem.at>> > Subject: Re: [PD] 4-point interpolation changes timbre depending on > sample rate > Message-ID: <B6FDFF69-EE54-4F59-8234-5A53D086229C@chair.audio > <mailto:B6FDFF69-EE54-4F59-8234-5A53D086229C@chair.audio>> > Content-Type: text/plain; charset="utf-8" > > I think now would be a good place to pause the implementation and discuss > if there is a need for this kind of algorithm in the PD community. > > We saw some use cases for the Whittaker-Shannon interpolation where > we gain in quality and/or speed. Namely waveguides and pitch shifters. > > Is there anything else, where we would like to use this interpolation kernel? > Like in general resampling? > In the tabread~ for sample playback? > Are there really quality or speed issues that we could solve there? > > For our use case the code I submitted is good enough. But I would be happy > to spend more time optimizing if there is a need / a broad use of that > algorithm. > In that case we need another restructuring and some help from somebody > who is very proficient in writing pd source code. :) -------- Dan Wilcox @danomatika <http://twitter.com/danomatika> danomatika.com <http://danomatika.com/> robotcowboy.com <http://robotcowboy.com/>
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