In addition to the main audio script for the model, you can also add background music to the model.
To insert background music, click the Background Audio button. The background music dialog box opens.
To insert the background audio, do the following:
Click the Browse button to import a song or musical track in PCM WAV/MP3 format.
Move the Volume slider to adjust the volume. You can also enter a number in the box next to the box to adjust the volume.
Check the Fade In or Fade Out options to specify if you want the background audio to fade in or out respectively.
Check the Loop box to repeat the background music continuously.
Click Preview to play back the background audio.
Click Clear if you want to select a new track. Click OK when done.