Apple Logic Pro 7 User Manual download pdf (Page 684)

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684 Glossary

alias A pointer to a MIDI Region in the Arrange window. 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 can not be

edited directly. Any change to the original Region will be reflected in the alias.

aliasing A digital artefact 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 which controls 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 sound’s volume, measured in decibels (dB).

analog signal A description of data that consists of a constantly varying voltage level,

that represents audio information. Analog signals must be digitized, or captured, for

use in Logic. 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 in which recurring rhythmic musical elements or elements

suitable for repetition are recorded. Apple Loops have tags and transients which allow

Logic to perform time stretching and pitch shifting. Theses tags also allow you to

quickly locate files by instrument, genre, or mood in the Loop Browser that is used to

import of Apple Loops in Logic. To open the Loop Browser, choose Audio > Loop

Browser.

Apple Loops Utility Logic’s Apple Loops Utility allows you to create your own Apple

Loops. To use the Apple Loops Utility, select a Region in Logic’s Arrange window and

choose Audio > Open in Apple Loops Utility.

Arrange window The heart of Logic. The primary working window of the program

where Audio and MIDI Regions are edited and moved to create a song arrangement.

ASCII Acronym for American Standard Code for Information Interchange. Standard

computer character set, providing a way for computers to deal with text characters.

When you type ASCII characters from the keyboard (which looks like words), the

computer interprets them as binary so they can be read, manipulated, stored, and

retrieved. Also see scan code.

attack Start phase of a sonic event. Also part of an envelope (see envelope).

attenuate To lower an audio signal’s level.

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Apple Logic Pro 7 User Manual Page 684

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