[PD] readanysf_duration_speed

[oskoff lovich]

  Hi August,

  thanks for the clarifications and the formula..

  only for comments; I like to force readanysf~ with
  high valors to the speed i mean 20 o 25 ( up of these valors crash the dsP:)
  It generate interesting textures (with longer files)
  Did it some kind of time-stretching when its running with this high
speeds ??  or something similar..

  best,

  oscar





t


2010/10/11, august <august at alien.mur.at>:
>
> Hi Oscar,
>
> 	According to the way readansyf~ interprets the file on disk (not a
> 	stream from the web) the length is fixed .
>
> 	If you have PD running at 44100 Hz and load a file that is 42
> 	seconds long but has a samplerate of 22050 Hz, the output of
> 	readanysf will still say that the file is 42 seconds long.  It will
> 	also automatically adjust the speed (resampling) to 0.5 so that it
> 	sounds "correct" when playing at PD's rate of 44100Hz.
>
> 	Also, the float output marked as "length in seconds that have been
> 	played so far" in the help file  and which incrementally updates as
> 	you play the file....really is "position in seconds" inside the file
> 	relative to the sound file's internal samplerate.   This might be a
> 	bit confusiong.
>
> 	So, you have 4 variables to deal with.
>
> 		1) samplerate of audio file
> 		2) samplerate of pd
> 		3) speed of readanysf that can adjust the audiofile samplerate
> 		4) length of file in seconds
>
> 	If I am not mistaken, to get the total perceived duration of
> 	playtime, the formula should then be:
>
> 	1/speed * length of file in seconds * youraudiofile_samplerate/pdsamplerate
>
>
> 		-august.
>
>
>> Hi list,
>>
>> I am using the audio player readanysf~ from August Black
>> and i have some question:
>>
>>  for the last outlet we have (samplerate, lenght in seconds, and others..)
>>
>>   the length in seconds of the player is related to speed=1
>>
>>
>>   if i change the speed for example   speed=0.20 obsviously the
>>   length of the file played is going to be more big..
>>
>>   how much ?   how can i calculate the new lenght in seconds for a
>> 44100 audio file?
>>   this speed means 20% of 44100 samples per second?
>>
>> any help is welcome!!
>>
>>  best,
>>
>>  oscar
>>
>> --
>> >>>http://noconventions.mobi/noish
>>
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