[PD] How to scratch large sound file ?

[Christof Ressi]

> but making a table big enough at first and load without -resize flag works.

why don't you use the "-maxsize" flag?

> So I set the play speed to 44100 and here the troubles begin....

can you explain or provide a test patch? in Miller's example I set the speed to 44100, filled the table with a 440 Hz sine wave (since I wouldn't be able to hear that 22050 Hz tone at original speed) and it worked fine.
 
 

Gesendet: Freitag, 21. April 2017 um 23:07 Uhr
Von: "Antoine Villeret" <antoine.villeret at gmail.com>
An: "Christof Ressi" <christof.ressi at gmx.at>
Cc: Pd-List <pd-list at lists.iem.at>
Betreff: Re: Re: [PD] How to scratch large sound file ?

yes, -resize flag and truncated output annoyed me, but making a table big enough at first and load without -resize flag works.
 
btw I do have a lots of high frequency artifacts.
in the example, the playback speed is limited to 1000 sample/sec.
But I need to play a 22 minutes long sound file with 44100 samples per second.
So I set the play speed to 44100 and here the troubles begin....
 
 

--
do it yourself                      
http://antoine.villeret.free.fr 
2017-04-21 22:58 GMT+02:00 Christof Ressi <christof.ressi at gmx.at[mailto:christof.ressi at gmx.at]>:ah, I see. you probably mean the "soundfiler_read: truncated to 4000000 elements" message in the Pd console. use the "-maxsize" flag to increase the maximum number of samples. on 64-bit Pd there's practically no limitation. with 32-bit you are limited to about 500 000 000 samples (~3 hours of mono audio)

> Gesendet: Freitag, 21. April 2017 um 22:51 Uhr
> Von: "Christof Ressi" <christof.ressi at gmx.at[mailto:christof.ressi at gmx.at]>
> An: "Antoine Villeret" <antoine.villeret at gmail.com[mailto:antoine.villeret at gmail.com]>

> Cc: Pd-List <pd-list at lists.iem.at[mailto:pd-list at lists.iem.at]>
> Betreff: Re: [PD] How to scratch large sound file ?
>
> > but how to fill a table with a sound with more than 4000000 samples ?
>
> what is the problem with that?
>
> > also I need high fidelity playback at nominal speed.
>
> Miller's varispeed example does achieve that. it uses the right inlet of [tabread4~] to prevent loss of precision.
>  
>  
>
> Gesendet: Freitag, 21. April 2017 um 22:45 Uhr
> Von: "Antoine Villeret" <antoine.villeret at gmail.com[mailto:antoine.villeret at gmail.com]>
> An: David <dfkettle at gmail.com[mailto:dfkettle at gmail.com]>
> Cc: Pd-List <pd-list at lists.iem.at[mailto:pd-list at lists.iem.at]>
> Betreff: Re: [PD] How to scratch large sound file ?
>
> Thanks for the hint, 
>  
> but how to fill a table with a sound with more than 4000000 samples ?
> is there a direct-from-disk solution for that ?
> also I need high fidelity playback at nominal speed.
>  
> Thanks 
>  
> Antoine
>  
>
> --
> do it yourself                      
> http://antoine.villeret.free.fr[http://antoine.villeret.free.fr] 
> 2017-04-21 22:38 GMT+02:00 David <dfkettle at gmail.com[mailto:dfkettle at gmail.com][mailto:dfkettle at gmail.com[mailto:dfkettle at gmail.com]]>:
>
> Which one? 
>  It's supposed to be possible with tabread4~, by using the onset inlet.
> There's an example in one of the help files. I looked at it a year ago and
> it was incomprehensible. YMMV.
>
> If you figure it out, please post a simple example patch. This is my
> greatest joy-killer in Pd, because I really want to work with audio files
> which may be 1-2 hrs long.
>
> On Friday, April 21, 2017, Antoine Villeret <antoine.villeret at gmail.com[mailto:antoine.villeret at gmail.com][mailto:antoine.villeret at gmail.com[mailto:antoine.villeret at gmail.com]]>
> wrote:
>
> > Hi,
> >
> > I'm looking for the best practice to scratch (change playback speed
> > quickly) large sound file.
> >
> > I've already tried :
> > - table and tabread4~ but table length is too limited
> > - readsf~ : can't change playback speed easily (I didn't try resampling
> > with block~ yet)
> > - august/readanysf~ : seems pretty great but can't play backward, it also
> > has a great feature : the return
> > - moonlib/sfread2~ : works with both positive and negative speed but only
> > with 16bit audio file and quite buggy (strange output when it can't find
> > file)
> > - moonlib/readsfv~ : works only with positive speed
> >
> > Does someone know how to play large sound file with playback speed control
> > (positive and negative) ?
> >
> > Thanks
> >
> > Antoine
> > --
> > do it yourself
> > http://antoine.villeret.free.fr[http://antoine.villeret.free.fr][http://antoine.villeret.free.fr[http://antoine.villeret.free.fr]]
> >
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