Apple Logic Express 9 - Manual (Page 1262)

ALAC Abbreviation for Apple Lossless Audio Codec, an encoding/decoding algorithm that
delivers lossless audio compression.
alias A pointer to a MIDI region in the Arrange area. An alias does not contain any data.
It simply points to the data of the original MIDI region. You can create an alias by
Shift-Option-dragging the original MIDI region to a new location. An alias cannot be
edited directly. Any change to the original region will be reflected in the alias.
aliasing A digital artifact that occurs when the sample material contains frequencies
higher than one-half of the sample rate.
allpass filter A filter that allows all frequencies to pass, providing only phase shift or
phase delay without appreciably changing the amplitude characteristic.
amplifier Device that increases the level of a signal.
amplitude This term is used to describe the amount of a signal. If you have an audio
signal, amplitude refers to the volume of the sound, measured in decibels (dB).
amplitude peak The loudest point of an audio signal.
analog signal A description of data that consists of an endlessy varying voltage level
that represents audio information. Analog signals must be digitized, or captured, for use
in Logic Express. Compare with digital.
anchor point The start point of the audio file that an audio region is based on. Also see
Sample Editor.
Apple Loops An audio file format, commonly used for recurring rhythmic musical elements
or elements suitable for repetition. Apple Loops contain tags and transients that are used
by Logic Express for time stretching and pitch shifting tasks. These tags also allow you
to quickly locate files by instrument, genre, or mood in the Loop Browser.
Apple Loops Utility The Apple Loops Utility allows you to create your own Apple Loops.
To use the Apple Loops Utility, select an audio region in the Arrange area and choose
Audio > Open in Apple Loops Utility.
Arrange area The primary working space of Logic Express. It is used to record, edit, move,
and arrange the audio and MIDI regions of a project. Also used for automation recording
and playback.
Arrange window The primary working window of the application. It also shows the
Arrange area (see above), and can incorporate all other working areas and editors.
1262 Glossary