User guide

Chapter 1 An Introduction to Logic Express 25
Any audio file used in Logic Express is automatically linked to at least one audio region
that is, by default, the length of the entire audio file.
You can freely create as many audio regions as you require. To give you an example of
where this may be useful, imagine a live stereo drum track that runs for the duration of
your project. During the second chorus, the drummer played perfectly, but was a little
sloppy during all other chorus sections.
Logic Express allows you to create an audio region that points to the second chorus
section of the overall (drum track) audio file, and use this perfect take in multiple
places in the project.
This is achieved by creating one audio region (that points to chorus 2 in the drum track
audio file), and copying it to each position that the chorus occurs in the Arrange area.
A great benefit of working with audio regions, rather than audio files is that they use
very little memory, whereas multiple copies of the same section of the audio file would
require a lot of hard disk storage space.
It is, of course, possible to directly edit, copy, and move audio files. This is achieved in
the Sample Editor and Media area.
MIDI Regions and Events
MIDI regions, by comparison, actually contain MIDI data events. They are not related to
information stored in external files. MIDI regions can be saved as individual files, but
they can also be, and generally are, stored as part of the project.
The MIDI data events stored within MIDI regions include; note, controller, program
change, and other information. These data events represent MIDI performances that
you have recorded into Logic Express. MIDI performances are generally created with a
MIDI keyboard, but can certainly be generated with MIDI controllers, MIDI guitars, your
computer keyboard or the mouse.
MIDI data events can be affected as a group by processing the MIDI region that
contains them. Such processing includes; transposition, quantization (timing correction,
which is similar to the spell checker of a word processor, when dealing with the
language of music), timing delays, and more.
MIDI region
MIDI note events MIDI controller events