Apple Logic Pro 7 (TDM Guide) - Manual (Page 40)

40 Glossary
controller MIDI data type. As examples; sliders, pedals or standard parameters like
volume and panning. The type of command is encoded in the first data byte, the value
in the second data byte.
Core Audio Standardized audio driver system for all Macintosh computers running
version 10.2 or higher. Core Audio is an integral part of Mac OS X, allowing access to all
audio interfaces that are Core Audio compatible. Logic is compatible with any audio
hardware that offers Core Audio drivers.
Core MIDI Standardized MIDI driver system for all Macintosh computers running
Mac OS X version 10.2 or higher. Core MIDI is an integral part of Mac OS X, allowing the
connection of all MIDI devices that are Core MIDI compatible.
DA converter or DAC Short for digital/analog converter; a device that changes an
analog signal into a digital signal.
DAE DAE is the abbreviated form of Digidesign Audio Engine. This is the driver
software for many Digidesign cards, and is primarily used for the operation of TDM
hardware and/or access to their on-board DSP chips.
DAW Acronym for Digital Audio Workstation. A computer used for recording, mixing
and producing audio files.
dB Abbreviation for decibels, a unit of measurement that describes the relationships of
voltage levels, intensity or power, particularly in audio systems.
default The preset parameter value.
destructive Destructive audio processing means that the actual data of an audio file is
changed, as opposed to just editing peripheral or playback parameters.
dialog A window containing a query or message. It must be cancelled or replied to
before it will disappear and allow you to continue.
digital A description of data that is stored or transmitted as a sequence of ones and
zeros. Most commonly, refers to binary data represented using electronic or
electromagnetic signals. All files used in Logic are digital. Also see analog for
comparison.
disclosure triangle A small triangle you click to show or hide details in the user
interface.
distortion The effect produced when the limit of what can be accurately reproduced
in a digital signal is surpassed, resulting in a sharp, crackling sound.
distributed audio processing See Logic Node application.