Time stretch using marquee selections
In the Tracks area, you can edit the timing of audio material using the Marquee tool in combination with flex markers.
Flex Time is also available in the Audio Track Editor, when Show Advanced Tools is selected in the Advanced preferences pane.
Time stretch audio using a marquee selection
Using the Marquee tool, drag in the Tracks area to select part of a region.
Using the Pointer tool, do one of the following:
Click in the upper half of the marquee selection.
Four flex markers are added: two at the marquee borders and two outside the marquee selection, at the previous and next transient markers.
Click in the lower half of the marquee selection.
Three flex markers are added: one at the clicked position and two at the marquee borders.
Drag the marquee selection in either direction.