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.

CD Audio and iTunes

The CD Audio format was the world’s first widely used entry in the digital audio format life cycle. The creation of this format was the start of the CD revolution. Instead of vinyl albums, which were a pain to deal with and included lots of hisses, pops, and other distractions when played, listeners began enjoying digital music. In addition to being much easier to handle than LPs, CDs provided a much better listening experience and were—and are—much more durable than records.
They also sounded much better than cassettes and could be just as portable.
Eventually, CD Audio made its way to computers, which now can provide all the music-listening enjoyment of a home stereo plus much more, thanks to applications such as iTunes.
Although you can use iTunes to listen to your audio CDs, typically you will just convert those CDs into one of the newer digital formats and store that content on your computer’s hard disk so you don’t have to use a CD when you want to listen to music. You will also make use of this format when you put your iTunes music on your own audio CD so that you can play your iTunes music when you are away from your computer.

Audio File Formats You Might Encounter When You Use iTunes

As you work with digital music and other audio files, you’ll encounter a number of different file formats that you need to understand. This is important because each of these formats offers specific benefits and limitations that impact what you do with your music. For example, some file formats offer better music quality versus file size than others. You definitely don’t need to have all the specifications for each of these formats committed to memory; instead, all you need to be able to do is to distinguish between them and to be able to choose the format that is the most appropriate for what you are trying to do.
Most audio file formats are encoded. What this means is that specific compression algorithms are used to reduce the size of the audio file without, hopefully anyway, lowering the quality of the resulting sound very much. The higher the compression that is used, the lower the quality of the resulting music when it is played back. Note that the words higher and lower are relative. Often, it takes a musical expert to tell the difference between encoded and unencoded music, but even if it is imperceptible to us mere mortals, it does exist.
When it comes to digital audio files, one trade-off always has to be made. And that is file size versus sound quality. When you add thousands of songs to your iTunes Library, you can easily consume gigabytes of disk space. Although you might have a humungous hard drive in your computer, you might also have other files you want to store on it, such as photos, Word docs, and so on. Even I realize that computers can be used for more than just music.
To keep the amount of disk space required to store your music to a minimum, you will encode it. When you do, you choose the settings you want to use to encode that music. The more encoding you apply, the less space the music will consume, but the lower quality the playback will be. You will quickly find a happy medium between file size and how the music sounds to you.

What You Can Do with iTunes?

Following are some examples just to whet your appetite:

• Listen to audio CDs.
  
• Listen to Internet radio.
  
• Store all the music you like in a single place so you never need to fuss with individual CDs again.
  
• Search and organize all this music so that listening to exactly the music you want is just a matter of a few mouse clicks (and maybe a few key presses).
  
• Create custom albums (called playlists) containing the specific songs you want to hear.
  
• Create custom albums (called smart playlists) that are based on a set of criteria, such as all the Jazz music you have rated at four or five stars.
  
• Use the iTunes built-in Equalizer to make your music just right.
  
• Burn your own music CDs to play in those oh-so-limited CD players in your car, a boom box, or in your home.
  
• Share your music collection with other people over a wired or wireless network; you can listen to music other people share with you as well.

Getting Help with iPod Problems

Apple maintains an extensive iPod Web site from which you get detailed information about iPod problems. You can use this information to solve specific problems you encounter (that aren’t solved with the information in the previous sections, such as a reset).
To access this help, use a Web browser to move to www.apple.com/support/ipod. On this page, you can search for help, read FAQs, and get other information that will help you solve iPod problems .There are a number of other Web sites that might be helpful to you as well. These include www.ipodlounge.com and www.ipodhacks.com. You can also use www.google.com to search for other iPod information; you’ll find no shortage of it.

Restoring an iPod

As you read earlier, you can also use the iPod Software Update application to restore an iPod. When you restore an iPod, its hard drive is erased and a clean version of its software is installed. The purpose is to configure the iPod with factory settings that will likely solve many problems you are having.

How to reset an iPod?

If you can’t get an iPod to do anything (and you’ve checked the Hold switch) or if it is behaving badly, try resetting it. When you reset an iPod, its temporary memory is cleared, but your data won’t be affected. Follow these steps:

1. Connect the iPod to the power adapter using the FireWire cable and then plug the power adapter into a wall outlet.
2. Move the Hold switch to the On position and then slide it to the Off position again.
3. Press and hold both the Menu and Play/Pause buttons down for about five seconds until you see the Apple logo on the iPod’s screen. This indicates that the reset process is complete.
4. Try to use the iPod to do what you were trying to do when you noticed a problem. If resetting your iPod solves your problem, you are home free. If not, you might want to try restoring it.