The audio tracks allow you to do sophisticated audio mixing. You can set the start times, the in/out and fade-in/out times, and volume for each audio element.
To work with audio tracks
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Click on the purple tinted boxes to select audio elements.
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Choose → or press Delete to remove an audio element.
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Drag selected audio elements within a single audio track or to other audio tracks.
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Copy, cut, and paste selected audio elements.
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Adjust the in and out times and the fade in and fade out durations by dragging the dark purple audio control points (see Editing audio timing).
