Apple Logic Express 7 - Manual (Page 151)

Glossary 151
loop An audio clip that contains recurring rhythmic musical elements or elements
suitable for repetition. Logic also supports Apple Loops.
Loop function Loop is a Region parameter in Logic that creates “loop repetitions” for
an Audio or MIDI Region. These repetitions will repeat until the song end point, or until
another Region or folder (whichever comes first) is encountered on the same track in
the Arrange window.
LFO Abbreviation for Low Frequency Oscillator. An oscillator that delivers modulation
signals below the audio frequency range—in the bandwidth that falls between 0.1 and
20 Hz, and sometimes as high as 50 Hz or 400 Hz.
lowcut filter A low cut filter is essentially a highpass filter that offers no slope or
resonance controls.
lowpass filter The lowpass filter defines the maximum frequency that can pass
through without being affected, thus controlling the brightness of the sound. Every
signal above this frequency will be cut. The higher the cutoff frequency, the higher the
frequencies that can pass through. A lowpass filter that offers no slope or resonance
controls is a high cut filter.
main menu bar The bar at the top of the computer screen, offering global functions
such as opening, saving, exporting, or importing songs. It does not offer access to local
functions.
merge Mix, or combine, two or more MIDI events, or Regions into a single Region.
metronome A part of Logic that produces a sound that taps out the beat. It can set by
click-holding the Metronome button in the Transport bar.
MIDI Abbreviation for Musical Instrument Digital Interface. Standardized,
asynchronous, serial, and event-oriented interface for electronic musical instruments.
MIDI is an industry standard that allows devices such as synthesizers and computers to
communicate with each other. It controls a musical note’s pitch, length, and volume,
among other characteristics.
MIDI channel A MIDI channel is a “tube” for MIDI data, which flows through MIDI ports
in channels. Up to 16 separate MIDI channels can pass through a port simultaneously.
MIDI message A message transmitted via MIDI consisting of one status byte and none,
one, two, or many data bytes (with system exclusive commands). See event.