Open the Word document first.
Click the header and Footer command under the View menu.
Figure 1 "Headers and footers" command
Click the mouse to edit the footer status.
Figure 2 Footer Edit Status
Open the Object command under the Insert menu.
Figure 3 "Objects" command
Select Windows Media Player in the object type.
Figure 4 Windows Media Player
Right-click the inserted object and select Properties.
Figure 5 Selecting the Properties command
Click the custom button at the top of the Properties window that you clicked, and then the browse button after customizing.
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Figure 6 The Browse button after you click Customize
Set the source file name or URL in the open window, that is, click the Browse button to select the automatically played file to add.
Figure 7 Click the Browse button to select the Automatically played file add
Set the Select mode to invisible and set playback options to auto start.
Figure 8 Setting play options to auto start
Play Count is set as needed, and when all is set, click OK to save the settings return to the main screen and save the Word document.