MP3 and iTunes

Even if this blog is your first foray into the wonderful world of digital music, you have no doubt heard of MP3. This audio file format started, literally, an explosion in music technology that is still reverberating and expanding today. MP3 is the acronym for the audio compression scheme called Moving Picture Experts Group (MPEG) audio layer 3. The revolutionary aspect of the MP3 encoding scheme was that music data could be stored in files that are only about one-twelfth the size of unencoded digital music without a noticeable degradation in the quality of the music. A typical music CD consumes about 650MB of storage space, but the same music encoded in the MP3 format shrinks down to about 55MB. Put another way, a single 3.5-minute song shrinks from its 35MB on audio CD down to a paltry 3MB or so in MP3 format. The small size of MP3 files opened up a world of possibilities.
For example, MP3 enabled a new class of portable music devices. Because MP3 files can be stored in small amounts of memory, devices with no moving parts can store and play a fair amount of music; these were the early MP3 players, such as the Rio. Then came other devices containing small hard drives—can you say iPod?—that can store huge amounts of music, enabling you to take your entire music collection with you wherever you go. These devices are extremely small and lightweight, and their contents can be easily managed.
You will encounter many MP3 files on the Internet, and with iTunes, you can convert your audio CDs into the MP3 format so that you can store them in iTunes and put them on an iPod.