SoX
Revision as of 18:42, 22 April 2009 by Michael Murtaugh (talk | contribs)
sox (Sound Exchange) is a handy command line tool for generating, manipulating, and applying simple filters to audio.
Synthesis
sox -c1 -r8000 -n -t wav - synth 0.25 sine 220 vol 0.7 > beep.wav sox -c1 -r8000 -n -t wav - synth 0.25 sine 220-440 vol 0.7 > sweep_up.wav sox -c1 -r8000 -n -t wav - synth 0.25 sine 440-220 vol 0.7 > sweep_down.wav sox -c1 -r8000 -n -t wav - synth 0.25 noise vol 0.7 > ch.wav sox -c1 -r8000 -n -t wav - synth 2.0 sine 220-1000 vol 0.7 > sweep_up_long.wav sox -c1 -r8000 -n -t wav - synth 2.0 sine 1000-220 vol 0.7 > sweep_down_long.wav sox -c1 -r8000 -n -t wav - synth 0.5 square 330 vol 0.7 > bleep.wav
Working with "raw audio"
Working with raw files allows audio to get appended together; here sox is used to take a bunch of wavs, make them raw, send them all to stdout, the repackage them as a wav file.
(for file in *; do sox "$file" -t .raw -r 44100 -sw -c 2 -; done) | sox -t .raw -r 44100 -sw -c 2 - -t .wav newfile.wav
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Resources
sox on sourceforge http://sox.sourceforge.net/
CLI Magic: Transform your audio files with SoX http://www.linux.com/article.pl?sid=06/10/18/1435254