Apple Logic Pro 8 - Manual (Page 337)

Chapter 13 Creating Your Arrangement 337
Mixdown of Audio Regions on a Track
If several overlapping audio regions are selected on a single track, no mixdown occurs.
You are asked to create a new audio file, which is named after the first region on the
track. The selected regions are then mixed together, with no changes to volume, and
without clip scanning.
If there are empty sections between two regions, these are added into the new audio
file—as silent passages.
Audio Crossfades in Digital Mixdown
The Digital Mixdown supports crossfades between selected regions.
The crossfade parameters are defined in the General Audio preferences tab, which can
be opened either by choosing Logic Pro > Preferences > Audio > General (or the Audio
Crossfade Options for Merge key command).
There are two faders:
 Crossfade Time [ms]: This is the length of the entire crossfade. To switch off the
crossfade, set this value to zero.
 Crossfade Curve: To obtain a linear crossfade, set this value to zero. Other values
(positive or negative), produce various exponential fades. The fade-outs and fade-ins
are always symmetrical, to avoid deviations in level. The preset values are: Time =
0 ms, Curve = 0 (linear).
Demixing MIDI Regions
You can split MIDI regions (or Standard MIDI File Formats 1 or 0) by event channels or
note pitches.
To split MIDI regions by event channels:
1 Select the desired MIDI regions.
2 Choose Region > Split/Demix > Demix by Event Channel (or use the corresponding key
command)
Logic Pro searches the selected MIDI regions for events with different MIDI channels.
 A separate MIDI region, containing all matching events, is created for every MIDI
channel that is found.