8

Glossary 429
chorus effect Effect achieved by layering two identical sounds with a delay, and
slightly modulating the delay time of one, or both, of the sounds. This makes the audio
signal routed through the effect sound thicker and richer, giving the illusion of multiple
voices.
click Metronome, or metronome sound.
Clipboard The Clipboard is an invisible area of memory, into which you cut or copy
selected data, using the Edit menu. Data stored in the Clipboard can be pasted to
different positions.
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.
clock Electrical synchronization impulse, transmitted every 1/96 note. Was used in
older drum machines before the advent of MIDI (MIDI Clock is a modern
implementation of simple clock signals. It runs at 24 ppqn—pulses per quarter note—
or 96 pulses per note).
comb filter effect A short delay of feedback that emphasizes specific harmonics in a
signal is generally termed a comb filter. The name is derived from the appearance of a
frequency spectrum graphic, which resembles the teeth of a comb.
compressor An effect that restricts the dynamic range of an audio signal (also see
expander).
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
being sent or received is encoded in the second data byte.
Controls view All Logic Express plug-ins (and Audio Units) offer a non-graphical
alternative to the Editor views of effect and instrument parameters. The Controls view is
accessed via the Controls item in the plug-in header’s View menu at the top of each
plug-in window. This view is provided to allow access to additional parameters and to
use less onscreen space.
Core Audio Standardized audio driver system for all Macintosh computers running
Mac OS X 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.
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.
count-in Beats heard prior to the start of a recording (or playback).