Apple Logic Pro 7 (TDM Guide) - Manual (Page 37)

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Glossary
AAF Abbreviation for Advanced Authoring Format. This file format, typically used for
data exchange with Digidesign ProTools software, can be imported and exported by
Logic. It allows multiple audio tracks to be imported, with reference to tracks and
Region position, volume automation included.
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.
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.
attenuate To lower an audio signal’s level.
audio file Any digital recording of sound, stored on your hard drive. You can store
audio files in the AIFF, WAV and Sound Designer II formats. All recorded and bounced
WAV files are in Broadcast Wave format.
Audio Instrument Logic supports the use of software based instruments. Software
instrument plug-ins are inserted into Audio Instrument Objects. Software instrument
recording takes place on Audio Instrument tracks in the Arrange window. Playback of
these tracks is routed via the Audio Instrument Object.
audio interface Device needed to get sound into and out of your computer. An audio
interface converts digital audio from your computer to analog waves that speakers can
broadcast, or, in the other direction, an audio interface converts analog waves into
digital audio your computer can work with.
Audio Mixer An Environment layer that shows all Audio Objects of a song. The Audio
Mixer is used for mixing multiple audio channels in real time. The Audio Mixer is also
known as Environment Mixer.