[PD] editing pd silence

[saskia diez]

im not using adc~ , if i create an empty sound file (silence)
with writesf~  and then if i  listen to that file i listen
silence, i dont listen anything, but if i open that file in a
sound editor and then i save again as wav, it adds a hiss , a
very subtle hiss, you need to boost up volumen to be able to
listen it.


I just discover this since i bought a nice speakers, before i
havent realize that sound editors add that hiss.

Why is that? is it possible to avoid that?


cheers

--
saskia diez
[1]saskia_diez at fastmail.fm

On Saturday, October 22, 2011 2:12 PM, "tim vets"
<timvets at gmail.com> wrote:

2011/10/22 saskia diez <[2]saskia_diez at fastmail.fm>

With silence i mean "no sound" , Im using writesf~ because im my
patch also generates sound , its not just silence.
The compositions im working on are 90 % silence and the rest
subtle sounds.


Do the silent areas in your soundfile *look* like silence?
are all the samples  0?
Also, if you say subtle sounds, I suppose those are at a rather
low volume. I would suggest to make them as loud as possible (so
that the loudest of them is normalized to maximum amplitude (1))
and lower the volume in the end stage (the amplifier you play it
back on). In other words, optimize the signal-to-noise ratio.
Tim





--
saskia diez
[3]saskia_diez at fastmail.fm


On Saturday, October 22, 2011 8:19 PM, "i go bananas"
<[4]hard.off at gmail.com> wrote:

  what do you mean 'record silence' ??
  do you have an adc~ connected or something?
  if not, then why bother with [writesf~]  ?  just make an empty
  table and save the table's contents with a write message to
  [soundfiler].

On Sat, Oct 22, 2011 at 7:53 PM, saskia diez
<[5]saskia_diez at fastmail.fm> wrote:

  Hello, maybe this is a bit out of topic:
   Im using the object writesf~ to record silence , the problem
  i have is
   when i open the .wav file in a sound editor as audacity and i
  edit the
   silence.
  When i export my silence it adds a hiss noise, its almost
  unperceptible,
  only you can listen to it when you boost up the volumen very
  much, but
  its there.
  I was wondering how can i edit a pd silence without that hiss?
  Is there
  a specific software for this?
  Or maybe this hiss is something specific to 16 bit .wavs?
  thanks
  Sas.
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   [6]saskia_diez at fastmail.fm
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References

1. mailto:saskia_diez at fastmail.fm
2. mailto:saskia_diez at fastmail.fm
3. mailto:saskia_diez at fastmail.fm
4. mailto:hard.off at gmail.com
5. mailto:saskia_diez at fastmail.fm
6. mailto:saskia_diez at fastmail.fm
7. http://www.fastmail.fm/
8. mailto:Pd-list at iem.at
9. http://lists.puredata.info/listinfo/pd-list
  10. http://www.fastmail.fm/
  11. mailto:Pd-list at iem.at
  12. http://lists.puredata.info/listinfo/pd-list

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