User Guide

638 Glossary
instrument channel Logic Pro and MainStage support the use of software based
instruments. Software instrument plug-ins are inserted into the Instrument slot of
instrument channels.
instrument object An object in the Logic Pro Environment designed to communicate
with a single-channel MIDI device. An instrument object represents a physical or virtual
device which handles MIDI information. Also see multi instrument object.
interface 1) A hardware component such as a MIDI or audio device that allows your
Logic Studio applications to interface (connect) with the outside world. You need an
audio or MIDI interface to get sound or MIDI into and out of your computer. Also see
audio interface. 2) A term that is used to describe graphical elements within your
Logic Studio applications that you can interact with. An example would be the
Logic Pro Arrange, where graphical interface elements such as regions are interacted
with to create a project, within the overall Logic Pro interface.
key The scale used in a piece of music, centered around a specific pitch. The specified
pitch is called the root of the key. Can also refer to a black or white key on a musical
(MIDI) keyboard.
key command Function which can be executed by pressing a specific key (or key
combination) on your computer keyboard or MIDI controller.
key focus The selected, active window, is said to have key focus in Logic Pro. Many key
commands will only function when a window has key focus. The Inspector also updates
to reflect the parameters of a window with key focus.
latency You may notice a delay between playing your keyboard and hearing the
sound. This is a form of latency. A variety of factors contribute to latency, including the
audio interface in use, audio and MIDI drivers. One factor under your control, however,
is the I/O buffer size, which is set in the Devices preferences.
legato Method of musical performance that smoothly connects one note to the next.
level meter A meter that monitors audio input or output levels to or from your
computer. You use the level meters in your Logic Studio applications when recording,
arranging, and editing audio files, and when creating a mix.
Link button Button in the top left corner of most Logic Pro windows that features the
chain link icon. It controls the linking between different windows.
local menu bar Menu in a window that only contains functions that are relevant to
that particular window.
Local Off mode Operating mode on a MIDI keyboard where the keyboard does not
directly play its own integrated sound generator. This is useful when using it as a
master keyboard for your Logic Studio applications.