Apple Logic Pro 9 - Manual (Page 413)

2 Choose Region > Merge > Regions per Tracks (or use the “Merge Regions per Tracks” key
command).
The selected regions are combined into one region per track. For example, if tracks 1 to
4 have regions that you want to merge, you can make your region selections in each
track lane, press Shift-J, and four merged regions are created—one for each track.
Merging MIDI Regions
When you merge MIDI regions:
• All events from each individual MIDI region retain their original time positions.
• The new (merged) MIDI region adopts the name and track of the first (along the timeline)
of the original MIDI regions.
• The Transposition, Velocity, and Dynamics region parameters—if not identical in all
selected regions—are normalized before the merge. This means that all parameter
values are written as data changes for each region before the merge. The parameters
of the newly created (merged) MIDI region are all set to neutral (default) values.
• If one of the region parameters (the Transposition value, for example) is set identically
in all selected regions, that value is preserved in the Region Parameter box for the
merged region, and the events remain unchanged from their original values.
Note: Be aware that the individual MIDI channels of events (if applicable) are replaced
by the MIDI channel of the current track Instrument channel strip.
Merging Audio Regions
Merging audio regions is a nondestructive operation because Logic Pro always creates a
new file for the merged audio material (sometimes called a mixdown).
This new audio file is stored (in the project folder) on your hard disk and is automatically
added to the Audio Bin. The merged region replaces the original regions.
413 Chapter 13 Creating Your Arrangement