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ENVEXT(1) The Canonical Csound Reference ENVEXT(1)

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.

COPYRIGHT

08/01/2011 5.10