In this dialog, you can change the duration of an audio selection, usually without changing its pitch.
You can stretch a selection to a specified duration (in minutes, seconds, and milliseconds), tempo (in bpm), or stretch factor (in percent).
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To open the Time Stretching dialog, select the Process tab in the Audio Editor, and click Time Stretching in the Time & Pitch section.
Source (Audio Selection)
- Duration
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If Edit Tempo is activated, you can change the tempo of the audio source. The number of bars and beats and the stretch factor are updated automatically.
If Edit Bars is activated, you can set the number of bars and beats and the signature for the audio source. The source tempo and the stretch factor are updated automatically.
Result
- Target Duration
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If this option is activated, the duration of the audio source is modified.
- Target Tempo
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If this option is activated, the tempo of the audio source is modified. For this to work, you must specify the original tempo or the number of bars and beats.
- Target Stretch Factor
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Indicates how much the audio duration changes. This parameter is automatically updated when you edit the other parameters, but you can also activate this option to edit it manually.
- Reset
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Resets the stretch factor to 100%, that is, no stretching occurs.
Method
- Preserve Pitch
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If this option is activated, the pitch of the audio material is not affected when you apply time stretching. If this option is deactivated, the pitch changes proportionally with the time stretching ratio.
- Accuracy pop-up menu
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Allows you to select whether to favor duration accuracy or pitch accuracy for time stretching.
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Favor Duration Accuracy preserves the length of the original audio.
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Favor Pitch Accuracy can result in a slightly different audio length after pitch shifting.
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