Apple Logic Express 8 - Manual (Page 295)

Chapter 12 Getting to Know Regions 295
MIDI and Audio Regions Compared
The following overview sums up the main differences between audio and MIDI regions.
There are some notes at the bottom of the table to clarify the most important points.
Naturally, some of the Inspector playback parameters (such as Transposition) that can
be applied to MIDI events have no effect on audio signals. Equivalent operations for
most of these are available as destructive edit operations in the Sample Editor.
Feature MIDI Regions Audio Regions
Composed of discrete data Yes No. Audio regions are just references to parts of
audio files.
Can be named Yes Yes
Loop option available Yes Yes
Quantize parameter available Yes No, but the position of regions themselves can be
quantized, using the Event List (when at the
Arrange display level). You can also quantize
audio files destructively in the Sample Editor.
Transposition parameter available Yes No, but you can use the Time Machine and Pitch
Shifting functions (in the Sample Editor and
Arrange). Audio Apple Loops can be transposed.
Velocity parameter available Yes No
Dynamics parameter available Yes No
Gate Time parameter available Yes No
Delay parameter available Yes Yes
Can be freely positioned Yes Yes
Left or right corner edit Yes Yes, and this affects the audio region, but not the
position of the audio waveforms relative to the
time axis of the sequencer
Can be cut with the Scissors tool Yes Yes, creates a new audio region.
Can have aliases made of them Yes Yes, although these are known as cloned (audio)
regions, to differentiate them from alias (MIDI)
regions.
Left corner may be dragged to
conceal data at beginning No Yes
Have a variable musical reference
point No Yes, a variable anchor. This affects all regions
derived from a given audio file, and can change
the position of the audio, relative to the time axis
of the sequencer
Can be turned off with the Mute
function Yes Yes
Can be placed in folders Yes Yes
Can be soloed Yes Yes