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Table Of Contents
1173Logic Pro User Guide
control surface A hardware device that communicates with Logic Pro via MIDI (or other
communication protocol). It can be used to write automation data and control parameters,
such as mixing levels and panning, and effects and instruments, as well as transport and
navigation functions, among others.
Controls view A nongraphical alternative to the Editor view of plug-in parameters. All
Logic Pro plug-ins (and AudioUnits) offer a Controls view, which you can open by choosing
Controls in the View pop-up menu at the top of the plug-in window. Controls view allows
access to additional parameters and often requires less screen space. Compare Editor
view.
CoreAudio A standardized audio driver system for all Macintosh computers running
MacOSX. CoreAudio is an integral part of MacOSX, allowing access to all audio
interfaces that are CoreAudio compatible. Logic Pro is compatible with any audio hardware
that is CoreAudio compliant.
Core MIDI A standardized MIDI driver system for all Macintosh computers running
MacOSX. Core MIDI is an integral part of MacOSX, allowing the connection of all MIDI
devices that are Core MIDI compatible. Logic Pro is compatible with any MIDI hardware that
is CoreMIDI compliant.
count-in Several metronome beats sounded prior to the start of a recording (or playback),
typically for one bar. The control bar features a Count-In button to control the count-in.
cutoff frequency The frequency at which the audio signal passing through a low or
highpass filter is attenuated (typically by 3dB).
cutting The process of reducing a level or frequency when using EQ or other filters. The
term is also used to describe dividing and removing sections of files, regions, and other
items. See also boosting and attenuate.
cycle area In Logic Pro, an area used to repeatedly play a particular part of a project for
composing, practicing, recording multiple takes, and other purposes. When Cycle mode
is on, the cycle area is displayed as a yellow strip in the upper part of the ruler (or in the
center, when the secondary ruler is visible).
DA converter (DAC) Short for digital/analog converter. A device that changes an analog
signal into a digital signal.
data bytes Elements that define the content of a MIDI message. The first data byte
represents the note, or controller number, and the second represents the velocity, or
controller value.
DAW Acronym for digital audio workstation. A computer system used for recording,
arranging, mixing, and producing audio files.
dB Abbreviation for decibel. A unit of measurement that describes the relationships
between voltage levels, intensity, or power, particularly in audio systems.
DC offset An error that can result in direct current (DC) being layered over the audio
signal, producing a vertical shift in the waveform position shown in the Audio File Editor.
decay An envelope parameter that determines the time it takes for a signal to fall from the
maximum attack level to the sustain level. See also envelope.
deesser A signal processor that removes hissing or sibilance in audio signals.
default The preset value of a parameter.