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Full Discussion: Experimental awk audio converter for CygWin and AudioScope.sh
Top Forums Shell Programming and Scripting Experimental awk audio converter for CygWin and AudioScope.sh Post 302923352 by wisecracker on Sunday 2nd of November 2014 01:02:54 PM
Old 11-02-2014
Hi Corona688...

Along with a few others, you have been extremely helpful with AudioScope.sh over its 21 month lifetime.

All I can say is many thanks.

I will try this baby of yours out and see how it goes on CygWin, as that is the platform that it is aimed at...

Bazza.

---------- Post updated 02-11-14 at 01:44 PM ---------- Previous update was 01-11-14 at 06:59 PM ----------

Hi Corona688...
Just this minute tried your code.
Had to add a '(' in red below to get it to run but ot only delivers 1 byte instead of 48000.
Code:
#!/bin/bash
# 16to8bit_new.sh
> /tmp/sample.raw
> /tmp/leftbinary
> /tmp/signed16bit.txt
dd if=/dev/urandom of=/tmp/sample.raw bs=1 count=192000 > /dev/null 2>&1
od -td2 -An /tmp/sample.raw > /tmp/signed16bit.txt
awk --characters-as-bytes 'NR%2 { printf("%c", (($1+32768)/256)) > OUT }' RS="[ \r\n\t]+" BINMODE=3 OUT="/tmp/leftbinary" /tmp/signed16bit.txt

Results:-
Code:
Last login: Sun Nov  2 13:30:37 on console
AMIGA:barrywalker~> cd Desktop
AMIGA:barrywalker~/Desktop> cd Code
AMIGA:barrywalker~/Desktop/Code> cd Awk
AMIGA:barrywalker~/Desktop/Code/Awk> ./16to8bit_new_c688.sh
awk: extra ) at source line 1
 context is
	NR%2 { printf("%c", >>>  ($1+32768)/256)) <<< 
awk: syntax error at source line 1
awk: illegal statement at source line 1
	extra )
AMIGA:barrywalker~/Desktop/Code/Awk> ./16to8bit_new_c688.sh
AMIGA:barrywalker~/Desktop/Code/Awk> ls -l /tmp/leftbinary
-rw-r--r--  1 barrywalker  wheel  1  2 Nov 13:39 /tmp/leftbinary
AMIGA:barrywalker~/Desktop/Code/Awk> _

---------- Post updated at 06:02 PM ---------- Previous update was at 01:44 PM ----------

This is an even smaller version for the LHS only and works a real treat in CygWin...
Thanks C688 for mentioning the removal BEGIN ...
Code:
#!/bin/bash
# 16to8bit_new.sh
> /tmp/sample.raw
> /tmp/leftbinary
> /tmp/signed16bit.txt
dd if=/dev/urandom of=/tmp/sample.raw bs=1 count=192000 > /dev/null 2>&1
od -td2 -An /tmp/sample.raw > /tmp/signed16bit.txt
awk --characters-as-bytes '
{
	BINMODE=3;
	FS=" ";
}
{
	if ($1=="") exit(0);
	$1=(int(($1+32768)/256));
	$3=(int(($3+32768)/256));
	$5=(int(($5+32768)/256));
	$7=(int(($7+32768)/256));
	printf("%c%c%c%c",$1,$3,$5,$7) > "/tmp/leftbinary";
}' < /tmp/signed16bit.txt

Listening tests were more than good, now I have to attempt to obtain a conversion to 8000Hz sampling rate for the frequency counter part of AudioScope.sh...

I have a simple idea to test and will post here when done.
 

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LEARN ABOUT XFREE86

dh_movefiles

DH_MOVEFILES(1) 						     Debhelper							   DH_MOVEFILES(1)

NAME
       dh_movefiles - move files out of debian/tmp into subpackages

SYNOPSIS
       dh_movefiles [debhelperoptions] [--sourcedir=dir] [-Xitem] [file...]

DESCRIPTION
       dh_movefiles is a debhelper program that is responsible for moving files out of debian/tmp or some other directory and into other package
       build directories. This may be useful if your package has a Makefile that installs everything into debian/tmp, and you need to break that
       up into subpackages.

       Note: dh_install is a much better program, and you are recommended to use it instead of dh_movefiles.

FILES
       debian/package.files
	   Lists the files to be moved into a package, separated by whitespace. The filenames listed should be relative to debian/tmp/. You can
	   also list directory names, and the whole directory will be moved.

OPTIONS
       --sourcedir=dir
	   Instead of moving files out of debian/tmp (the default), this option makes it move files out of some other directory. Since the entire
	   contents of the sourcedir is moved, specifying something like --sourcedir=/ is very unsafe, so to prevent mistakes, the sourcedir must
	   be a relative filename; it cannot begin with a `/'.

       -Xitem, --exclude=item
	   Exclude files that contain item anywhere in their filename from being installed.

       file ...
	   Lists files to move. The filenames listed should be relative to debian/tmp/. You can also list directory names, and the whole directory
	   will be moved. It is an error to list files here unless you use -p, -i, or -a to tell dh_movefiles which subpackage to put them in.

NOTES
       Note that files are always moved out of debian/tmp by default (even if you have instructed debhelper to use a compatibility level higher
       than one, which does not otherwise use debian/tmp for anything at all). The idea behind this is that the package that is being built can be
       told to install into debian/tmp, and then files can be moved by dh_movefiles from that directory. Any files or directories that remain are
       ignored, and get deleted by dh_clean later.

SEE ALSO
       debhelper(7)

       This program is a part of debhelper.

AUTHOR
       Joey Hess <joeyh@debian.org>

11.1.6ubuntu2							    2018-05-10							   DH_MOVEFILES(1)
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