Apple Logic Pro 7 User Manual Page 360

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360 Chapter 9 Audio Window
Moving the Start Point
To adjust the start point of a Region, grab the left border. The tool turns into a small
hand pointing to the right. You can now adjust the start point.
Moving the End point of a Region
To adjust the end point of a Region, grab the right border. The tool turns into a small
hand pointing to the left. You can now adjust the end point.
Moving the whole Region
You can also move an entire Region within an audio file, by grabbing it in the middle.
The tool turns into two arrows pointing left and right. If the Region is very small, use
the zoom function to enlarge the section. Make sure you can see the two arrows before
making any alterations.
If you want to adjust the boundaries of the Region without moving the Anchor, hold
down Option during the operation. This applies to moving the start or end points, as
well as moving the whole Region.
Moving the Anchor
To move the Anchor, grab the small Anchor triangle below the Region. The tool turns
into the Region Edit tool. A vertical guide line appears above the Anchor triangle.
Snapping to Zero Crossings
If Edit > Search Zero Crossings is switched on, adjustments to the start or end positions
of a Region are snapped to the nearest point where the wave form crosses the zero
axis. This ensures glitch-free playback. When adjusting the startpoint, the area
preceding the selected point is searched. When adjusting the end point, the area that
follows the Region is searched. This option is useful when defining Regions in the
Audio window.
Search Zero Crossings also applies to all operations in the Arrange window.
Making Fine Adjustments
The graphic display in the Audio window is optimized for quick and simple
organization of audio files and Regions. This involves displaying as many things as
possible simultaneously in the window. Given this, the finest resolution for positioning
the start and end pointers, or the Anchor, is limited to units of 256 samples. This is
usually adequate, particularly if search zero crossings is switched on.
On occasion, however, you need to make precise adjustments—down to individual
sample word level. Drum loops are a good example. The Sample Edit window is better
suited to these situations. To open the Sample Edit window for a Region, double-click
on it!
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