[PD] How to navigate a long sound file in vanilla PD

Roman Haefeli reduzent at gmail.com
Tue Mar 31 11:35:33 CEST 2015

Hi Stefan

>From readsf~help.pd:

"Open takes a filename, an onset in sample frames, and, as an override,
you may also supply a header size to skip, a number of channels, bytes
per channel, and endianness."

So the second argument (the one after the filename) specifies the number
of audio samples to be skipped at the start when opening the file. 


On Tue, 2015-03-31 at 11:18 +0200, Stefan Tiedje wrote:
> Hello list,
> might well be the first post here, though I am well experienced in 
> Max/MSP...
> As there is no way to get Max patches run on mobile devices, I want to 
> do it in PD using the MobMuPlat apps for Android/iOS.
> The task would be to simply to play a stereo sound file, but of about 
> one hour lebgth. As MobMuPlat only supports vanilla PD I am restricted 
> to that as far as I know.
> In the docs and on the net I did not find any way to navigate within 
> that playback. (Its crucial for rehearsals.) The size is too big for 
> loading it into RAM (the mobile devices which are around often have less 
> than 1 GB of RAM), Is there a known way to tackle this seemingly simple 
> task???
> A tedious way, I want to avoid, would be to split the sound file into 
> pieces, which would at least let me jump in at specified places, but 
> that would eat up the space on the device, as each piece would have to 
> play until the end...
> Of course I would also love to find a way to play back an mp3 and freely 
> navigate within that as well...
> Any hints how to proceed are appriciated...
> Stefan Tiedje

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