How to keep music volume decreases slowly (Fade Out) at the end of the presentation?

1. In the first slide, go to the Audio tab, select Play Audio and select the file you want to play
2. Check the Fade Out option
3. Select the last slide of the presentation.
4. In the Audio tab, choose Stop Audio

Thus, the music starts on the first slide, then continue to be played until it encounters the command "Stop Audio" from the last slide and then decrease in volume until it stops (Fade Out).