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 5.07 06/23/2009 ENVEXT(1)
Check Out this Related Man Page
SNDINFO(1) The Canonical Csound Reference SNDINFO(1)NAME
sndinfo - Displays information about a soundfile. .
DESCRIPTION
Get basic information about one or more soundfiles.
SYNTAX
csound -U sndinfo [options] soundfilenames ...
sndinfo [options] soundfilenames ...
INITIALIZATION
sndinfo will attempt to find each named file, open it for reading, read in the soundfile header, then print a report on the basic
information it finds. The order of search across soundfile directories is as described above. If the file is of type AIFF, some further
details are listed first.
There are two option types:
1. -i or -i1 will print instrument information, which includes looping. The option continues until a -i0 option.
2. The other option is -b which prints the broadcast information for WAV files. It can similarly be negated with -b0.
EXAMPLES
csound -U sndinfo test Bosendorfer/"BOSEN mf A0 st" foo foo2
where the environment variables SFDIR = /u/bv/sound, and SSDIR = /so/bv/Samples, might produce the following:
util SNDINFO:
/u/bv/sound/test:
srate 22050, monaural, 16 bit shorts, 1.10 seconds
headersiz 1024, datasiz 48500 (24250 sample frames)
/so/bv/Samples/Bosendorfer/BOSEN mf A0 st: AIFF, 197586 stereo samples, base Frq 261.6 (MIDI 60), sustnLp: mode 1, 121642 to 197454, relesLp: mode 0
AIFF soundfile, looping with modes 1, 0
srate 44100, stereo, 16 bit shorts, 4.48 seconds
headersiz 402, datasiz 790344 (197586 sample frames)
/u/bv/sound/foo:
no recognizable soundfile header
/u/bv/sound/foo2:
couldn't find
AUTHORS
Barry Vercoe
MIT Media Lab
Author.
Dan Ellis
MIT Media Lab,
Cambridge
Massachussetts
Author.
COPYRIGHT 5.07 06/23/2009 SNDINFO(1)
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