PRESONUS AudioBox Stereo Quick Start Manual page 193

switching to Follow or Don't Follow from Timestretch will return any timestretched Audio
Event that Track contains back to its original state.
When timestretching, if the tempo is drastically changed (by about 30 bpm or more), the
audio can become slightly distorted. While this can lead to interesting effects, you should be
aware of the limitation of this technology.
In Studio One, timestretching can occur automatically or manually. The following describes
these functions.
6.7.1 Manual Timestretching
With manual timestretching, you can stretch an Audio Event independently of the Song
tempo or audio file tempo.
To manually stretch an Audio Event with the Arrow tool, float the mouse cursor to the edge of
the target Audio Event and hold [Alt]/[Option] on the keyboard. The Timestretch tool will
appear, allowing you to click on the edge of the Event and drag left or right to timestretch the
Event, making it shorter or longer In this case, the length of the Event will change, using the
Speedup factor, but the pitch of the audio the Event contains will remain the same. Only the
Event that you selected for timestretching will be affected.
Speedup factor is a timestretching function for making an audio clip shorter or longer while
maintaining its pitch. Values greater than 1 decrease the length of the clip, while values less
than 1 make the clip longer. This is used to stretch audio events when you do not wish to
define a tempo for the original audio clip, which would affect all events associated with that
clip. The Speedup factor can be entered in the Event Inspector.
6.7.2 Automatic Timestretching
Automatic timestretching is based on the relationship between the Song tempo and the audio
file's tempo.
Each Audio Track has a Tempo mode that controls the behavior of the events on the track,
based on the Song tempo. The Tempo mode can be selected in the Track Inspector. The
following modes are available:
Don't Follow. Events on this track are independent of the Song tempo. They are never
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moved or stretched automatically.
Follow. The start positions of Events on this track are tied to the musical grid. Thus,
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the Events move when the Song tempo changes but they are not stretched.
Timestretch. Event start positions follow the Song tempo, as in Follow mode. In
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addition, the Events are stretched to fit the Song tempo.
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