Apple Logic Pro 7 - Manual (Page 691)

Glossary 691
driver Drivers are software programs that enable various pieces of hardware and
software to be recognized by other programs in a computer, and also to have the
appropriate data routed to them in a format they can understand. In Logic, you can use
the Preferences > Audio > Drivers panel to select and configure your audio hardware
drivers. If you do not have the proper driver installed, your computer may not
recognize or work properly with a given piece of hardware.
drop in, drop out Going into and out of record to replace a section of an existing
recording. This process can be automated in Logic. This function is also known as
punch in/out.
DSP (digital signal processing) In Logic, 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’s signal.
DTDM Mixer Logic Pro supports a number of Digidesign hardware devices via Direct
TDM. The DTDM mixer is created in Logic’s Environment window, and allows the use of
Logic “native” effects and instruments with suitable Digidesign hardware.
dynamics Refers to changes in volume or other aspects of a piece of music over time.
dynamic range The dynamic range of a sound system is the difference in level
between the highest signal peak that can be reproduced by the system (or device in
the system) and the amplitude of the highest spectral component of the noise floor.
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 offers the Hyper, Matrix, and Score
editors for MIDI event data, and the Sample Editor for audio data.
Editor view Almost all Logic plug-ins (and Audio Units) offer a graphical view of effect
and instrument parameters. The Editor view is used by default, but can be accessed via
the Editor pull-down menu at the top of each plug-in window, should the Controls
view be visible.
effect A type of software algorithm that lets you alter the sound of a track in a variety
of ways. Logic includes a set of EQ, dynamics, time-based, modulation, and distortion
effects in Logic’s native and Audio Unit plug-in formats.
envelope The envelope is the variation that a sound exhibits over time, an envelope
basically determines how a sound starts, continues, and disappears. Synthesizer
envelopes usually consist of Attack, Decay, Sustain, and Release phases.