SoX (Sound eXchange) - Revision history

161.253.47.104: /* Concatenating two .wav files */

2005-11-29T14:56:59Z

Concatenating two .wav files

161.253.47.104: /* Concatenating multiple sound files */

2005-11-29T14:55:40Z

Concatenating multiple sound files

161.253.47.104: /* Uses */

2005-11-26T05:52:36Z

Uses

161.253.47.104: /* Converting to raw */

2005-11-26T04:18:21Z

Converting to raw

161.253.47.104 at 19:49, 14 November 2005

2005-11-14T19:49:44Z

161.253.47.104: /* Generating silence */

2005-11-14T19:45:28Z

Generating silence

161.253.47.104: /* Generating silence */

2005-11-14T19:19:21Z

Generating silence

161.253.47.104 at 09:10, 10 November 2005

2005-11-10T09:10:42Z

161.253.47.104 at 23:48, 9 November 2005

2005-11-09T23:48:30Z

161.253.47.104 at 22:41, 9 November 2005

2005-11-09T22:41:46Z

New page

''SoX (Sound eXchange)'' is a GPL command-line sound processor available from http://sox.sourceforge.net/.

I haven't used it yet, but I wanted to start taking notes on it; it may become useful for writing sound scripts. :-)

=boutell.com scripts=

==Concatenating two .wav files==

This is from http://www.boutell.com/scripts/catwav.html.

<nowiki>
#!/bin/sh
sox $1 -r 44100 -c 2 -s -w /tmp/$$-1.raw
sox $2 -r 44100 -c 2 -s -w /tmp/$$-2.raw
cat /tmp/$$-1.raw /tmp/$$-2.raw > /tmp/$$.raw
sox -r 44100 -c 2 -s -w /tmp/$$.raw $3
rm /tmp/$$*.raw</nowiki>

==Generating silence==

This is from http://www.boutell.com/scripts/silence.html. Even though I like Perl a whole lot, I'd probably be inclined to just dd from /dev/null and sox it as a raw file.

<nowiki>
#!/usr/bin/perl

$seconds = $ARGV[0];
$file = $ARGV[1];
if ((!$seconds) || ($file eq "")) {
die "Usage: silence seconds newfilename.wav\n";
}

open(OUT, ">/tmp/$$.dat");
print OUT "; SampleRate 8000\n";
$samples = $seconds * 8000;
for ($i = 0; ($i < $samples); $i++) {
print OUT $i / 8000, "\t0\n";
}
close(OUT);

system("sox /tmp/$$.dat -b -r 44100 -c 2 -s -w $file");
unlink("/tmp/$$.dat");</nowiki>

@@ Line 7: / Line 7: @@
 ==Concatenating multiple sound files==
-SoX is reportedly capable of concatenating up to 32 files at a time.  (I assume the output format to be the same as the format of the first input file, but I can't be certain.)
+SoX is reportedly capable of concatenating up to 32 files at a time.  As an error message will tell you if you attempt otherwise, input files must have the same rate, channels, data size, and encoding.
   sox infile1.au infile2.au infile3.au [...] outfile.au

← Older revision		Revision as of 05:52, 26 November 2005
Line 4:		Line 4:

	For my purposes, SoX will probably become most useful for converting WAV files between formats, and for converting to and from raw data files (which could then be concatenated using stuff like cat or perl, then converted back).		For my purposes, SoX will probably become most useful for converting WAV files between formats, and for converting to and from raw data files (which could then be concatenated using stuff like cat or perl, then converted back).
		+
		+	==Concatenating multiple sound files==
		+
		+	SoX is reportedly capable of concatenating up to 32 files at a time. (I assume the output format to be the same as the format of the first input file, but I can't be certain.)
		+
		+	sox infile1.au infile2.au infile3.au [...] outfile.au
		+
		+	This is useful for recovering data from Audacity sessions. The [[Audacity recovery script]] I wrote uses this functionality.

	==Converting to raw==		==Converting to raw==

← Older revision		Revision as of 04:18, 26 November 2005
Line 10:		Line 10:

	sox -V src.wav -r 44100 -c 2 -s -w dst.raw		sox -V src.wav -r 44100 -c 2 -s -w dst.raw
		+
		+	For those interested in other representations,
		+
		+	* Signs
		+	** signed (-s)
		+	** unsigned (-u)
		+	* Lengths
		+	** 8-bit/byte (-b)
		+	** 16-bit/word (-w)
		+	** 32-bit/long (-l)
		+
		+	If raw files are passed with the extensions .ub, .uw, .sb, .sw, .ul, or .sl, the corresponding representation will be assumed.

	If you're interested in the length of what you're converting, -V outputs some data on stderr (redirect with 2>) that looks something like this:		If you're interested in the length of what you're converting, -V outputs some data on stderr (redirect with 2>) that looks something like this:

← Older revision		Revision as of 19:49, 14 November 2005
Line 68:		Line 68:

	sox src.wav dst.wav lowpass 3700		sox src.wav dst.wav lowpass 3700
		+
		+	=My scripts=
		+
		+	==Generating silence==
		+
		+	This script is intended for [[Cygwin]], because I'm using the Windows version of SoX. Changing it for [[Unix]] is trivial, but if you're on Unix anyway you should be using dd and /dev/zero in a shell script instead.
		+
		+	<nowiki>
		+	#! /usr/bin/perl
		+
		+	use warnings;
		+	use strict;
		+	use Carp;
		+
		+	if(@ARGV != 2) {
		+	die "usage: $0 seconds outfile\n";
		+	}
		+
		+	my $samples = int($ARGV[0] * 11025) * 4;
		+	my $file = $ARGV[1];
		+
		+	my $nulls = pack('C*', ( (0) x 1024 ) );
		+
		+	my $temp = "/tmp/s-$$-temp1.raw";
		+	my $wtemp = `cygpath -w "$temp"`;
		+	my $wfile = `cygpath -w "$file"`;
		+	chomp $wtemp;
		+	chomp $wfile;
		+
		+	my $out;
		+	open($out, ">$temp")
		+	or die "Could not open temp file $temp for write\n";
		+	binmode $out;
		+	while($samples > length($nulls))
		+	{
		+	print $out "$nulls";
		+	$samples -= length($nulls);
		+	}
		+	$nulls = substr($nulls,0,$samples);
		+	print $out "$nulls";
		+	close $out;
		+	print "Temp file written. Converting...\n";
		+
		+	my $cmd = qq(sox -s -w -r 11025 -c 2 "$wtemp" -r 44100 -c 2 "$wfile");
		+	system($cmd);
		+	unlink($temp);</nowiki>

	=boutell.com scripts=		=boutell.com scripts=

@@ Line 85: / Line 85: @@
 ==Generating silence==
-This is from http://www.boutell.com/scripts/silence.html.  Even though I like Perl a whole lot, I'd probably be inclined to just dd from /dev/zero and sox it as a raw file.  But /dev/zero doesn't seem to exist on [[Cygwin]].
+This is from http://www.boutell.com/scripts/silence.html.  I use my own, completely different version.
   <nowiki>

@@ Line 139: / Line 139: @@
 ==Concatenating two .wav files==
-This is from http://www.boutell.com/scripts/catwav.html.
+This is from http://www.boutell.com/scripts/catwav.html.  But SoX is perfectly capable of doing its own concatenation; simply specify multiple input files.
   <nowiki>

@@ Line 1: / Line 1: @@
 '''SoX (Sound eXchange)''' is a GPL command-line sound processor available from http://sox.sourceforge.net/.
-I haven't used it yet, but I wanted to start taking notes on it; it may become useful for writing sound scripts. :-)
+=Uses=
 =boutell.com scripts=

← Older revision		Revision as of 23:48, 9 November 2005
Line 1:		Line 1:
−	''SoX (Sound eXchange)'' is a GPL command-line sound processor available from http://sox.sourceforge.net/.	+	'''SoX (Sound eXchange)''' is a GPL command-line sound processor available from http://sox.sourceforge.net/.

	I haven't used it yet, but I wanted to start taking notes on it; it may become useful for writing sound scripts. :-)		I haven't used it yet, but I wanted to start taking notes on it; it may become useful for writing sound scripts. :-)