If you don't
Those users who need to apply the fade-in/fade-out effect to a video can use the features Add Color Clip + Opacity. But for applying this option for audio files, an Animotica user can select a separate feature like Add Fade-in/Add Fade-out effect for audio.
It’s a great option for those Animotica users who intend to add the dramatic effect or a pause in the middle of the clip. Experiment — it’s very easy to use this option for all audio formats.