Key Terms


Don't let unfamiliar terms discourage you from learning all you can about the iPod and iTunes. If you don't completely understand what one of these words means, flip to the indicated page, read the full definition there, and find techniques related to that term.

Advanced Audio Coding (AAC)

A digital audio format co-developed by Apple as part of the MPEG-4 definition; AAC has better quality than MP3, as well as optional built-in DRM. Page 10



AirPort Express

One of Apple's brand of wireless Internet connectivity devices, a wireless base station that provides not just wireless (802.11g) connectivity but also an audio connection between iTunes and a stereo and set of speakers to which it's connected. 288



AirTunes

A feature of AirPort Express that broadcasts the capability to route music to a set of externally connected speakers from any copy of iTunes running on the network; any of these iTunes computers can choose the AirTunes-managed speakers and play music through them wirelessly. 288



allowance

A recurring, fixed amount of credit that you make available at the iTunes Music Store for another person, such as your child, to be able to use to download music without having to have his own credit card and paid iTunes account. 143



audiobook

The digital equivalent of the spoken-word tape. It's a special kind of digital audio file that plays for a long time as its content (the text of a book or speech) is read. The file includes additional technology such that, if you pause listening to the audio stream, iTunes remembers where you left off and picks up again at that point when you resume listening. This technology even works if you move from iTunes to iPod as you listen to the audiobook. 72



authorize

Register a computer over the network to be able to play protected AAC and MPEG-4 files purchased using a particular iTunes account. 126



autofill

A technique for selecting just enough songs at random from a specified source to fill your iPod shuffle or iTunes phone to capacity. With one button click, you can copy a whole new set of music to the device. 221



bit rate

The number of bits per second consumed by an audio stream; the bit rate can be constant or variable; if constant, the bit rate can be used to calculate how much disk space a song file will take up. 67



bookmarking

Not an official term; refers to iTunes' ability to keep track of where you left off listening to a podcast or audiobook, or stopped watching a TV show; iTunes starts there again when you view the item again, whether in iTunes or on the iPod. Bookmarking can be enabled or disabled on a per-file basis in the Options pane of the Info window, using the Remember playback position check box. 72



broken pointer

A song entry in the iTunes database that points to a file that no longer exists or has been moved to another location so that iTunes can't find it. Broken pointers are marked with a ! icon. 300



burn

To create a music CD using a writable disc (CD-R, CD-RW, or writable DVD). Page 4



burner

A CD or DVD drive capable of creating written, or burned, discs as well as reading them. Most modern computers are sold with CD burners, and many come with DVD burners as well. 261



CD-R

Writable compact disc. A CD-R can be burned once, and after that its contents cannot be changed. A CD-R or CD-RW can hold 650 or 700 megabytes of data, depending on the format. 261



CD-RW

Rewritable compact disc. A CD-RW can be burned multiple times, usually up to a few dozen times. 261



Compact Disc Digital Audio (CDDA)

The standard specification for mastering compact discs, which includes a specific format for the uncompressed audio data in each track. 258



compression

Fitting more music into a fewer number of bytes by discarding unimportant musical data or indexing repeated patterns. 65



contact sheet

A grid of small thumbnail images representing a group of photos, such as in the Photos section of the iPod, where you can browse your photos 30 to a screen. 355



crossfading

Having one track fade out at its end; the next track begins as the previous one is still fading. 199



deauthorize

Revoke the ability for a computer to play protected AAC files purchased using a particular iTunes account, freeing up one of the available authorizations. 126



deep discharge

Battery characteristics where optimum longevity and performance result from discharging the battery completely before recharging it. 251



Digital Rights Management (DRM)

Software algorithms that provide "copy protection" for digital music, usually enforced with digital "keys." 15



DVD-R

Writable digital versatile disc. A DVD can hold 4.7 gigabytes of data and generally costs significantly more than a writable CD. Data on a DVD is heavily compressed, making the format much more complex than that of a CD. Some DVD formats, such as DVD+RW and DVD-RW, can be written to more than once. "Dual-layer" discs cost more and can store twice as much data. 261



ethernet

A physical connection to a LAN is done using Ethernet, a low-level communication protocol that involves cables that end in RJ-45 jacks, which resemble large phone jacks. All modern Macs have an Ethernet port, which runs at 10, 100, or (on top-end models) 1000 megabits per second. 288






iPod + iTunes for Windows and Mac in a Snap
iPod + iTunes for Windows and Mac in a Snap (2nd Edition)
ISBN: 0672328992
EAN: 2147483647
Year: 2006
Pages: 150
Authors: Brian Tiemann

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