Find the insert option in the PowerPoint menu bar, click the sound option to add directly or click the sound drop-down menu to find the sound in the file.

Then the "Insert Sound" window will pop up, where we can find the path of the music file (as for the music file, you can download various songs online or insert music into PPT), select it and click OK.

After clicking OK, you will find a "small speaker" in PowerPoint and a dialog box with two options, namely "automatic" and "when clicking". As the name implies, "automatic" means that the concert will play automatically during the slide show, and "click" means that the music file will start to play automatically when the left mouse button is clicked during the show. It depends on personal needs here.

2, multiple slides PPT background music continuous playback method:

On the basis of adding the first music before, set the menu bar "Animation" and set the "custom animation" of the sound file icon: right click-effect option-effect-stop playing-after several slides (to play the whole song until the end of the slide, fill in the numbers of all slides)-OK.