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Operating Systems OS X (Apple) Plotting A Sine Curve Inside A Bash Shell... Post 302914574 by wisecracker on Tuesday 26th of August 2014 05:47:42 PM
Old 08-26-2014
Hi Corona688...

Hmm, neat.

I never considered using 'awk' in its entirety.

Although I have used 'amplitude' and 'centreline' values to plot inside the terminal I intend to use character 32 (space) and 126 (tilde) as the pk-pk amplitude(s) and "N" or "O" as the centreline. This then makes the whole waveform fully editable in any text mode editor. ;o)

I never even considered how Windows would react under my version as I was more interested in a calculator as a 'bc' replacement for CygWin.

I seem to remember you pointing out how badly Windows reacts to many fork()s in a thread since gone.

Thanks for your creation. Once I have gotten to grips with it consider it stolen... ;oD
 

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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
5.07 06/23/2009 ENVEXT(1)
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