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envext

Langue: en

Version: 06/05/2009 (debian - 07/07/09)

Section: 1 (Commandes utilisateur)

NAME

envext - Extracts the envelope of a file to a text file. . 

SYNTAX

 envext [-flags] soundfile
 
 csound -U envext [-flags] soundfile
 

INITIALIZATION

soundfile - Name of the input soundfile.

The following flags are available for envext (The default values are stated in parenthesis):

-o fnam Name of output filename (newenv)
-w size (in seconds) of analysis window (0.25)

The envext utility generates a text file containing time and amplitude pairs by finding the absolute peak within each window.

EXAMPLE

Using the command (while in the manual directory):

 csound -U envext examples/mary.wav
 

will produce the a text file containing the following:

   0.000   0.000
   0.000   0.000
   0.250   0.000
   0.500   0.000
   0.750   0.000
   1.249   0.170
   1.499   0.269
   1.530   0.307
   1.872   0.263
   2.056   0.304
   2.294   0.241
   2.570   0.216
   2.761   0.178
   3.077   0.011
   3.251   0.001
   3.500   0.000
 

Which shows the time for the peak amplitude within each measured window.

CREDITS

Author: John ffitch

1995

AUTHORS

Barry Vercoe
MIT Media Lab
          

Author.

Dan Ellis
MIT Media Lab,
          Cambridge
          Massachussetts
        

Author.

Mais les esprits faux ne sont jamais ni fins ni géomètres.
-+- Blaise Pascal (1623-1662), Pensées I.1 -+-