Apple Logic Pro 9 - Manual (Page 393)

You can choose the time stretching and compression algorithm used for this function in
the Arrange area’s Audio > Time Stretching Algorithm menu. Details on each algorithm
are found in
Using the Sample Editor’s “Time and Pitch Machine” .
Time Stretching Multiple Regions
Modifier keys have an impact on how time stretching or compression works when multiple
regions are selected. The following table outlines all modifier options, and their impact
(or otherwise) when multiple region lengths are changed:
Result Modifier
Same absolute length change; no time correction None
Same absolute end position; no time correction Shift
Same absolute length change, with time correction Option
Same absolute region length, with time correction Option-Shift
Can be used after clicking for finer resolution length changes, but
cannot be used in conjunction with Option; no time correction Control
MIDI Region-Specific Length Change Operations
The following functions apply only to MIDI regions.
To round a MIDI region start point to a bar
µ
Use the MIDI > Set Region Start to Bar command (or use the corresponding key command)
to round the start point of the selected MIDI region to the nearest bar.
The MIDI > Set Optimal Region Sizes Rounded by Bar command (or the corresponding
key command, default assignment: Shift-Command-B) reduces or increases the length
of a selected MIDI region, making it just large enough to contain the events (or regions,
if a folder) within it. The region borders are rounded to the nearest bar.
Hold down the Option key when using this function to round the region borders to the
nearest denominator value (or use the Set Optimal Region Sizes Rounded by Denominator
key command).
Cutting, Copying, and Pasting Regions
You can select, remove, or replicate one or more regions from one part of an arrangement
to another. In fact, you can use the Cut, Copy, and Paste commands between the
arrangements of two projects, if you wish.
To cut a region
µ
Select the region, then choose Edit > Cut (or use the Cut key command, default
assignment: Command-X).
This action removes the region from the Arrange area and places it in the Clipboard.
393 Chapter 13 Creating Your Arrangement