A Ruby wrapper for the sox command line tool to process sound.

• SoX
• Bash (for process substitution combiner strategy)
• Chromaprint (only to run tests)

apt-get install libsox-fmt-all sox libchromaprint-dev

# One of the following
# Notes:
# * chromaprint is not available in MacPorts as of this writing
# * flac must be installed before sox so it will link during compilation
sudo port install flac sox && brew install chromaprint
brew install flac sox chromaprint

Remember that it's a wrapper for sox to provide Ruby API. It's assumed that you know the basics of sound computing theory and how the sox tool works. Otherwise, man sox is your good friend.

Allows you to do everything that the sox command does.

Mix 3 files into one (ruby-sox assumes that input files have same rate and number of channels):

# Build command
sox = Sox::Cmd.new(:combine => :mix)
        .add_input("guitar1.flac")
        .add_input("guitar2.flac")
        .add_input("drums.flac")
        .set_output("hell_rock-n-roll.mp3")
        .set_effects(:rate => 44100, :channels => 2)

# Execute command
sox.run

Sox::Combiner combines files even if they have different rates or numbers of channels. Under the hood, it converts the input files into temporary files to have the same rate and number of channels, and then combines them.

Concatenate:

combiner = Sox::Combiner.new(['in1.mp3', 'in2.ogg', 'in3.wav'], :combine => :concatenate)
combiner.write('out.mp3')

Mix 3 files into an MP3 with 2 channels and a rate of 1600:

combiner = Sox::Combiner.new(['in1.mp3', 'in2.ogg', 'in3.wav'], :combine => :mix, :rate => 1600, :channels => 2)
combiner.write('out.mp3')

rake spec

• Sergey Potapov

Copyright (c) 2013 TMX Credit, author Potapov Sergey

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

The audio files are distributed under Creative Commons Attribution 3.0 Unported License.

Copyright (c) 2013 TMX Credit.