[PD] tabread4~ interpolation revisited

[Christof Ressi]

> I have to apologize, yes the artifacts were produced by the indexing

I've thought so :-) Interpolation artifacts are *usually* very subtle while the indexing artifacts might be quite harsh.

> will use the second inlet from now on.

note that zexy has an (undocumented) [tabread4~~] object where the second inlet works at audio rate. this is useful for doing (sub)sample-accurate granular synthesis on long tables.

> Interesting! How do you do that? Would you mind sharing an example?

it's an external :-) I can add the logic to [tabplay~] and make a PR, maybe Miller is interested in this.

Christof

> Gesendet: Montag, 03. Juni 2019 um 11:19 Uhr
> Von: "Peter P." <peterparker at fastmail.com>
> An: pd-list <pd-list at iem.at>
> Betreff: Re: [PD] tabread4~ interpolation revisited
>
> Dear Christof, dear list,
>
> * Christof Ressi <christof.ressi at gmx.at> [2019-06-02 17:46]:
> > > 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)?
> I have to apologize, yes the artifacts were produced by the indexing
> indeed. It turned out that 90 seconds into a 120 seconds file at 44k1
> would already be too much for tabread4~'s indexing. Sorry for the noise,
> will use the second inlet from now on. And make a promise to myself to
> write a wrapper around tabread4~
>
> > 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.
> Interesting! How do you do that? Would you mind sharing an example?
>
> Thanks!
> Peter
>
>
>
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