1 Make sure that your background music is a valid link or embedded (if the link is not a relative path in the process of moving, the link will be invalid or not embedded, so the audio file is not embedded. You need to modify the music limit size and music format.

2 Confirm whether the option to stop the previous sound (slide switch, custom animation, etc.) is used during the playback. Have different versions, descriptions and functions)

3 confirm whether to use other sound effects (such as mouse click sound to customize animation switching, etc. ) is generally the default. If another sound is played, the previous sound will be stopped.