Apple Logic Pro 9 - Manual (Page 599)

Time Stretching Regions
Logic Pro allows you to time stretch audio regions directly in the Arrange area, using
menu or key commands. Time stretching an audio region changes its tempo and length,
but not its pitch.
When applying these functions to a region in the Arrange area, a new file—reflecting the
tempo and length changes—is created, leaving the original intact. Both new and old files
are accessible in the Audio Bin.
Logic Pro offers different time stretching and compression algorithms in the Arrange
area’s Audio > Time Stretching Algorithm menu. The different algorithms are best-suited
for particular types of musical material. For more information, see
Using the Sample
Editor’s “Time and Pitch Machine” .
Note: You can also time stretch selected audio regions directly in the Sample Editor, using
the Time and Pitch Machine.
To adjust the region length to match the locator positions
1 Select the audio region that you want to time stretch.
2 Control-click (or right-click) the Cycle button in the Transport bar, and make sure the Auto
Set Locators by Region Selection option is not selected.
3 Set the left and right locator positions in the Bar ruler.
599 Chapter 18 Working with Tempo and Audio Regions