Apple Logic (1.1) - Manual (Page 115)

Glossary 115
clipping (in digital recording) Feeding too much signal through a channel strip,
thereby exceeding the limit of what can be accurately reproduced results in a distorted
sound known as clipping. Logic’s Audio Objects feature a clip detector, which indicates
signal level peaks above 0 dB.
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.
Cycle function A function in Logic which constantly repeats the area between the
Locator positions. To turn on Cycle mode, click the Cycle button in the Transport
window. The cycle function is useful for composing a part of a song or editing events,
as examples. The Cycle area is shown as a green stripe in the top part of the Bar Ruler.
DA converter or DAC Short for digital/analog converter; a device that changes an
analog signal into a digital signal.
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.