1. First open aa and insert the audio you need to gradient. 2. After the insertion is completed, double-click the audio to enter the single track editing mode.

3. First press the play button in the lower left corner Listen, then hold down the left button and select the part that needs to be gradient,

4. Click Effect-Amplitude-Expand/Gradient,

5. As shown in the figure, enter the gradient selection box, Fade out means that the selected audio section gradually becomes smaller and becomes silent. Fade in means that the selected audio section gradually becomes louder from silence. Finally, click OK.

6. Here we take fade out as an example. You will see that the small piece of audio you selected gradually becomes smaller. Complete renderings.