Apple Logic Pro 9 - Manual (Page 1316)

DFS An abbreviation for Digital Full Scale. Sometimes expressed as 0 dB DFS. This (zero
dB—as shown on the Logic Pro channel strip level meters) is the maximum theoretical
level that a digital signal can reach before clipping and other types of distortion may be
introduced.
dialog A window containing a query or message. You must interact with it (by clicking
a button) before you can 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 by electronic or electromagnetic signals.
All files used in Logic Pro are digital. Also see analog for comparison.
Digital Full Scale See DFS.
disclosure triangle A small triangle you click to show or hide details in the user interface.
distortion The effect that occurs when the limit of what can be accurately reproduced
in a digital signal is surpassed, resulting in a sharp, crackling sound.
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 and drop Grabbing objects with the mouse, moving them, and releasing the mouse
button.
drag editing A Take Folder Editing mode where you use the mouse to cut, drag, and
move take folder and take region elements. See quick swipe comping.
Drag pop-up 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.
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.
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 dB.
1316 Glossary