Converting audio formats

Let's imagine you want to take a track from a music CD and put it onto an mp3 player or email it a friend (leaving aside discussions about copyright for a moment). Dragging a file from the CD to your computer via Windows Explorer or some other file management utility doesn't work, because what you see in Explorer is a pointer to the music track, not the track itself. To extract the track, you need to "rip" the CD. A very good free tool to do this is CDex, which is quite intuitive, except for where you find the files on your computer after CDex has done its job. You will find them in the folder My Documents\My music\MP3\ and maybe further in at No artist\No title.
The resulting files are in the .wav format, which is an uncompressed format, and an average 3min song will probably be in the region of 35mb in size. To transfer them to an mp3 player, you have to convert the track to the mp3 format, which you can do with a free utility such as Free Mp3 Converter. This is a pretty intuitive piece of software, and you can happily run with the default settings, which will give you a file approximately one-tenth the size of the original. You can compress this even further, if you care to play around with the compression settings, which you will find under Output Configuration\Format Parameter. If you choose, for instance, a sampling frequency of 44 100 Hz and a bitrate of 96kHz you will at least halve the file size again, although with a small sacrifice in quality. Further reductions can get you down to email-size files, although the quality may be a bit dire. On tracks that are voice alone, however, this is not so noticeable.