Logic Pro 9 User Manual - Help Library - Apple

Note: Time compression or expansion may lead to reduced sound quality. However,
if Slicing mode is selected, the audio itself is never time-compressed or expanded, so
the sound quality is retained.
• Red: High-speed sections, where time compression equals or exceeds factor
8—time-stretching factor 0.125—turn from green to red and come with a warning.
Moving Flex Markers Without Time Stretching
You can change a flex marker’s position in an audio region without changing the timing
of the audio material before or after the flex marker.
To move a flex marker without time stretching
µ Hold down the Option key while you drag the flex marker.
When you drag a flex marker, you can press the Option key to turn time stretching off,
or release the Option key to turn time stretching on.
Deleting Flex Markers
When you delete a flex marker, any time alteration that took place in the area around it
is either removed—with the audio material reset to its original position—or reset according
to the time-stretching offset of the previous or following flex marker.
There are a number of methods you can use when deleting one or more flex markers,
including quantize markers.
To delete a flex marker
Do one of the following:
µ Double-click the flex marker.
µ Drag across the flex marker with the Eraser tool.
Important: Make sure to use the Eraser tool in the body of the waveform only. Clicking
the region header with the Eraser deletes the entire region.
µ Control-click (or right-click) the flex marker, then choose Delete Flex Marker from the
shortcut menu.
Chapter 16 Flex Time Editing
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