Wave files (*.wav) Midi sequencer files (*.mid)
RealAudio files (*.ram; *.ra) AIFF sound files (*.aif; *.aifc; *.aiff) AU sound files (*.au; *.snd) Moving Picture Experts Group (*.mpeg) MPEG Audio-Layer 3 files (*.mp3 Microsoft Active Streaming files (.*asf)
To insert the sound make sure you're in the page you want and that you are in design view. Then right click anywhere on the page and select page properties. On the general tab, under background sound, locate and click the sound file you want. If you don't see your file type in the list of types when you do this you must manually type the full path to your file.