The files most commonly used to burn music onto CDs are known as mp3 files. These are audio files that work on computers, portable audio players and CDs. Although personal audio players often have a high storage capacity, CDs hold a comparatively smaller amount of information. By using an mp3 file shrinker, you can compress the size of files and burn more music onto your CDs. There are dozens of file shrinkers available on the Internet. The iTunes program itself, which is free to download, comes with a file shrinker that is accessible to everyone.
Open the iTunes program. If you do not have iTunes already installed on your computer, you can download it for free at itunes.com. The download link will appear right on the main web page and will provide you with the necessary steps to load the program.
On the "Edit" drop-down menu in iTunes, select "Preferences."
Under the "General" tab in "Preferences," click on "Import Settings." Select the mp3 encoder under the "Import Using" drop-down menu. Select the "Custom" setting. Select 112 kbps or 128 kbps. Any smaller and the quality of the audio file will be compromised. Click "OK."
Close "Preferences" and select a song from your iTunes library that you would like to convert.
Select "Create mp3 Version" which is located under the "Advanced" tab in the iTunes main menu.
Repeat step 5 for all the songs you would like to put on the CD.
Go to the "File" tab in iTunes and select "New Playlist." Add all the songs you would like on the CD from the iTunes library to the new playlist.
Insert a blank disc into the disc driver.
Go back to the "File" tab in iTunes and select "Burn Playlist to Disc." To start burning the CD, choose the speed and the disc format. Click "Burn."