PRESONUS AudioBox Stereo Quick Start Manual page 200

If you are manipulating Bend Markers on a Track, you should set the Timestretch mode of the
Track to Audio Bend, so that the audio is processed with the correct algorithm. This algorithm
will ensure that transients are unaffected, only stretching or compressing the "tail," or
harmonic content, that follows the transient.
Note that for audio to be stretched or compressed by manipulating a Bend Marker, at least
one other Bend Marker should exist to the left or right of the one being manipulated, to be
used as the basis for stretching or compressing. If no other Bend Marker exists, the beginning
and end of the audio clip for the Event will be used. For instance, if you want to change the
rhythmic phrasing of a word in a vocal part, you will want to add a Bend Marker to the left and
right of the word you want to alter before attempting to move the word itself.
Multiple Bend Markers can be selected and edited at once with the Bend tool by holding Shift,
clicking-and-dragging to select the Bend Markers, and then performing the desired edits.
You can reset a Bend Marker to its original position by right-clicking on it and selecting Reset
Bend Marker. Multiple selected Bend Markers can be reset at once, making it possible to easily
restore the original timing if editing produced undesirable results.
6.9.2.2 Use The Bend Panel
When working with Bend Markers, you may find it useful to have the Bend panel displayed, as
this is where the most common Bend Marker-related actions are found. To open the Bend
panel, click on the Bend-panel button in the toolbar or select Bend from the Views/Additional
Views menu. The Bend panel can also be detached and freely placed onscreen.
In the Detection section, you can change the transient-detection mode, which is set to
Standard by default. If this mode does not accurately locate transients to your liking, switch
the mode to Sensitive and analyze the audio again.
In the Bend Marker section, you can Remove all Bend Markers or Restore all Bend Markers in
the selected Event by clicking on the respective buttons. You can also adjust the Bend Marker
Threshold, using the slider.
In the Track section, you can set the Timestretch mode for the Track on which the selected
Event resides and can select Guide Tracks if that Track is in a Group.
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