Apple Logic Pro 9 - Manual (Page 392)

• Set the value in the Transport bar’s Locator fields.
2 Select the regions within the locator boundaries.
Tip: You can quickly select all regions inside the locators by choosing Edit > Select Inside
Locators (or using the corresponding key command, default assignment: Shift-L).
3 Choose Region > Trim Regions to Fill within Locators (or use the corresponding key
command).
This function lengthens all selected regions (within the locator boundaries), closing the
gaps between them. The last region on each track (within the locator boundaries) is not
affected.
Time Stretching the Contents of a Region When Changing Length
In normal use, the position of events within MIDI regions is not affected by changes to
the region length. Similarly, changes to audio region lengths have no impact other than
starting and stopping playback at particular project positions.
You can, however, time stretch or compress the contents of regions when altering their
length.
To time stretch or compress the position of events within a MIDI region
µ
Option-drag the end of a MIDI region.
The events within the region are stretched or compressed, proportionately, by the amount
that the MIDI region is altered in length.
You can make a rhythmic MIDI region play in half-time by stretching it to twice the original
length, or in double-time by shortening it to half the original length.
To time stretch or compress audio regions
µ
Option-drag the end of an audio region.
This action stretches or compresses the audio by the amount that the region is altered
in length, and replaces the original region with a new PCM audio file (in the original file
format, or AIFF, if the original was not PCM).
Note: The current setting in the Snap pop-up menu has an impact on length changes.
You can make an audio region play at half-speed by stretching it to twice the original
length, or at double-speed by shortening it to half the original length.
392 Chapter 13 Creating Your Arrangement