Manual

980 Glossary
division value Adjustable value (shown in notes) for the grid used in displays and
operations. Third number displayed in the Transport bar’s Position display. The division
value is set in the Transport bar, below the time signature.
Drag menu A pop-up menu found in the local menu of linear editing windows. It
determines the behavior of regions or events when dragged to an overlapping
position.
drag & drop Grabbing objects with the mouse, moving them, and releasing the mouse
button.
driver Drivers are software programs that enable various pieces of hardware and
software to be recognized by computer applications. If the proper driver is not
correctly installed for your audio hardware, your computer may not recognize or work
properly with it. See Devices tab.
DSP (digital signal processing) In Logic Pro, the mathematical processing of digital
information to modify a signal. An example is the Insert slot of channel strips, which
assigns DSP effects such as dynamic compression and delay to a channel signal. Even
simple operations such as changing volume and pan are DSP calculations.
dynamics Refers to changes in volume, or other aspects of a piece of music, over time.
dynamic range The dynamic range is the difference in level between the highest
signal peak that can be reproduced by an audio system (or device in the system) and
the amplitude of the highest spectral component of the noise floor. Put another way,
the dynamic range is the difference between the loudest and softest signals that the
system can reproduce. It is measured in decibels (dB). See decibels.
editor Window for editing MIDI or audio data. Logic Pro offers the Hyper, Piano Roll,
Event List, and Score editors for MIDI event data, and the Sample Editor for audio data.
The Event List can also be used for region editing and positioning tasks.
Editor view Almost all Logic Pro plug-ins (and Audio Units) offer a graphical view of
effect and instrument parameters. The Editor view is the default, but can be accessed
via the Editor item in the View menu at the top of each plug-in window, should the
Controls view be visible.
effect A type of software algorithm that alters the sound of an audio signal in a variety
of ways. Logic Pro includes a set of EQ, dynamics, time-based, modulation, and
distortion effects in the Logic Pro native and Audio Unit plug-in formats.
envelope The envelope graphically represents the variation that a sound exhibits over
time. An envelope, used as a controlling device, basically determines how a sound
starts, continues, and ends. Synthesizer envelopes usually consist of attack, decay,
sustain, and release phases.