* For Windows users *

For those of you who are not familiar with command-line operations, here is how to use the sox program from a computer 
running a Windows operating system.

1. Download sox-14.4.0-win32.exe executable file from http://sourceforge.net/projects/sox (the website should detect the 
download appropriate for your system).

2. Once the executable file is finished downloading, it may automatically start the installation program or you might have 
to click the executable file to start the installation program.

3. The installation program will give you a choice of components to install.  The component "sox-14.4.0" should be 
checked.  Click "Next".

4. Select a folder where the sox program will be installed, hereafter referred to as the "sox folder".  The default is 
"c:\sox-14-4-0" or on Windows 7, "c:\Program Files (x86)\sox-14-4-0".

5. From the Windows menu: click Start -> All Programs -> Accessories -> Command Prompt.  A command line window with the 
title "Command Prompt" should pop up.

6. In Command Prompt window, type: cd <sox folder> (use quotes if there is a space in the name)
  
   e.g. cd "c:\Program Files (x86)\sox-14-4-0"

7. Copy secret.wav from the homework webpage into the sox folder

8. In Command Prompt window: (with the sound file you wish to convert in the sox folder as well), type

    sox secret.wav secret.dat

9. Now you should see the converted file secret.dat in the sox folder.


* For Mac users *

1. Download sox-14.4.0-macosx.zip from http://sourceforge.net/projects/sox (the website should detect the 
download appropriate for your system).

2. Unzip the file and remember the location of that folder.  (To get the location, right-click on the folder, and 
choose "Get Info".  Look for "Where:".  What appears after is the location of the folder, e.g. 
"/Users/alice/sox-14-4-0".)

3. Open Terminal.

4. In Terminal, type: cd <sox folder> (use quotes if there is a space in the name)
  
   e.g. cd /Users/alice/sox-14-4-0
	(this folder has no spaces, so no quotes are necessary)

7. Copy secret.wav from the homework webpage into the sox folder

8. In Terminal: (with the sound file you wish to convert in the sox folder as well), type

    ./sox secret.wav secret.dat

9. Now you should see the converted file secret.dat in the sox folder.