[LAU] (no subject)

[LAU] (no subject)

[Kevin Cosgrove]

Hi,

Is there a program which will convert a sound file into a text
(.txt) or comma separated value (.csv) file?  I'm thinking that
would be a good route to go in order to import the data from a
sound file into a math manipulation program, e.g. octave, maxima,
Matlab, Mathcad, Gnumeric, etc.   If not, this would seem to be
a good enhancement for SoX, or Audacity, or any sound file editor.

Thanks....

--
Kevin

Re: (no subject)

[David Graff]

kevinc@doink.com said:
> Is there a program which will convert a sound file into a text (.txt)
> or comma separated value (.csv) file?  I'm thinking that would be a
> good route to go in order to import the data from a sound file into a
> math manipulation program, e.g. octave, maxima, Matlab, Mathcad,
> Gnumeric, etc.

Someone else will probably know of existing tools for importing audio 
sample data into one or another math package, but if I had to convert 
from binary to ascii numerics, I'd probably use sox to convert the 
input file to a raw single-channel output of appropriate endian-ness, 
and run a perl one-liner to reformat the binary numbers into strings; 
e.g.:

 sox 1chn_pcm.wav -t raw - | 
  perl -e 'while(read(STDIN,$_,2)==2){printf("%d\n",unpack("v",$_))}' > 1ch_pcm.txt


(You probably want to elaborate the perl script to produce a different
output format, depending on what your math package wants as input.)

	Dave Graff



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Re: (no subject)

[Vijay Gaur]

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Hi,
  Did anyone used sox to convert mp3 to wav.
  I would greatly appreciate if someone can post me the instructions.
  I need to convert mp3 file to wav(16KHz, 16bit, mono).

Thanks a bunch in advance.
Vijay


On 7/25/07, David Graff <graff@ldc.upenn.edu> wrote:
>
>
> kevinc@doink.com said:
> > Is there a program which will convert a sound file into a text (.txt)
> > or comma separated value (.csv) file?  I'm thinking that would be a
> > good route to go in order to import the data from a sound file into a
> > math manipulation program, e.g. octave, maxima, Matlab, Mathcad,
> > Gnumeric, etc.
>
> Someone else will probably know of existing tools for importing audio
> sample data into one or another math package, but if I had to convert
> from binary to ascii numerics, I'd probably use sox to convert the
> input file to a raw single-channel output of appropriate endian-ness,
> and run a perl one-liner to reformat the binary numbers into strings;
> e.g.:
>
> sox 1chn_pcm.wav -t raw - |
> perl -e 'while(read(STDIN,$_,2)==2){printf("%d\n",unpack("v",$_))}' >
> 1ch_pcm.txt
>
>
> (You probably want to elaborate the perl script to produce a different
> output format, depending on what your math package wants as input.)
>
>        Dave Graff
>
>
>
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-- 
Regards,
Vijay Gaur
Do you green?
www.LimeAll.com

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Re: (no subject)

[Rafal Maszkowski]

On Wed, Jul 25, 2007 at 10:02:21AM -0700, Kevin Cosgrove wrote:
> Is there a program which will convert a sound file into a text
> (.txt) or comma separated value (.csv) file?  I'm thinking that

.dat format.

R.
-- 
Jeżeli upadnie cywilizacja zachodnia, to będzie szansa na odbudowę cywilizacji
      chrześcijańskiej. (dr Stanisław Krajski, Radio Maryja, 10 X 2001)

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Re: (no subject)

[David Graff]

Sorry -- there was a mistake in that perl script -- it should have been:

  perl -e 'while(read(STDIN,$_,2)==2){printf("%d\n",unpack("s",$_))}'

Note the "s" (for signed short int in native byte order), instead "v"
(unsigned short int in "VAX" (little-endian) byte order) -- the "s"
assumes that you're using a little-endian machine.  If you aren't, use
the "-x" (xinu) option on sox to invert the byte order of ms-wav pcm
files.

	Dave Graff




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