User manual

247
The Sample Editor
Determining the audio tempo automatically
and time-stretching your audio
If you want to use an audio file with an unknown tempo in
your project context, the easiest way to determine the
tempo is to define a loop. You can then determine the
tempo of the loop automatically (or manually) and finally
match the tempo of this loop to the project tempo in Cu-
base.
1. Import a suitable audio file, for example a drum loop
and double-click on it to open it in the Sample Editor.
2. Make sure that the first downbeat of the audio clip is
aligned with the first beat of the first bar in the Sample Ed-
itor.
If your audio file is a two or four bar loop, you can import it
into your project and proceed with step three, if you have
a longer audio file, possibly with an upbeat, you have the
following possibilities to define a loop:
• Resize your event by adjusting the Event Start and the
Event End and make sure that the Preview mode is acti-
vated.
or…
• Make a selection range in a longer clip and click the Au-
dition Loop button.
Adjust the selection range until the loop is smooth.
A 4 bar loop has been selected.
3. Open the Definition tab and make sure the Bars value
corresponds to the length of the audio file, or the selection
range, respectively.
If necessary, listen to your audio to determine the correct bar length.
4. Click the Auto Adjust button to automatically adjust
the grid to the audio file.