[PD] tabread4~ interpolation revisited

[cyrille henry]

Le 02/06/2019 à 17:46, Christof Ressi a écrit :
>> bleeding from the interpolation artefacts audible in almost every second
>> composition.
> 
> in your specific cases, are the artifacts really caused by the interpolation scheme or rather a product of indexing [tabread4~] with large floats (instead of using the second inlet)?
> 
> if it is really the interpolation, would you mind sharing sound examples? I'm genuinely curious.

you can have a look at tabread4c~ help file in nusmuk-audio lib (that can be installed thanks to deken)
cheers
Cyrille

> 
>> At that time a lot of list members agreed that it might be great to
>> switch interpolation algorithms in tabread4~ with an argument or
>> message to the object.
> 
> Sounds like a nice feature!
> 
> Only tangentially related, but we might want to add a [rate( message for [tabplay~]. [tabplay~] can play arbitrarly large arrays without precision issues while with [tabread4~] this is only possible with complicated abstractions. I've made my personal version of [tabplay~] which allows to change the playback speed at message rate and I've found it *very* useful.
> 
> Christof
> 
>> Gesendet: Sonntag, 02. Juni 2019 um 16:58 Uhr
>> Von: "Peter P." <peterparker at fastmail.com>
>> An: pd-list <pd-list at iem.at>
>> Betreff: [PD] tabread4~ interpolation revisited
>>
>> Hi list,
>>
>> having asked my students to compose pieces in Pd using audio data in
>> tables and reading them via tabread4~ my ears are still slightly
>> bleeding from the interpolation artefacts audible in almost every second
>> composition. Surely, everyone likes to slow down playback and I think it
>> should be possible without too many audible artifacts in Pd.
>>
>> There is this legendary discussion on this list
>> https://lists.puredata.info/pipermail/pd-list/2008-06/062864.html
>> after Cyrille kindly posted about his tabread4c~ external. He also
>> pointed out more elaborate interpolation schemes such as in
>> https://lists.puredata.info/pipermail/pd-list/2008-06/063221.html
>> At that time a lot of list members agreed that it might be great to
>> switch interpolation algorithms in tabread4~ with an argument or
>> message to the object. As far as I can tell no additional interpolation
>> got implemented until today. Am I correct here?
>>
>> The issue got briefly revisited two years later in 2010
>> https://lists.puredata.info/pipermail/pd-list/2010-03/077232.html
>> and raised by me again in 2015
>> https://lists.puredata.info/pipermail/pd-list/2015-05/110312.html
>> https://lists.puredata.info/pipermail/pd-list/2015-06/110751.html
>> after which I switched to supercollider for the specific project I was
>> working on at that time as it performed better at slow playback.
>>
>> What could be a possible way to get slow playback from tables with less
>> artifacts? (I am tempted to add "in 2019") ;)
>>
>> Thank you for all ideas and comments!
>> P
>>
>>
>>
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