The download may be free but copyrights for usage still apply. Sometimes,
however, if the music is not being used for commercial purposes you can use
the music...
Anyway, the music needs to be ripped and converted to a
PowerPoint-compatible file. From PPTools.com here are audio formats that
work:
•Audio Interchange File Format (*.aiff, *.aif, *.aifc)
•Motion Pictures Expert Group Layer-3 (*.mp3, *.m3u) (Note: May only be
inserted with PowerPoint 2000 but may be played back with PowerPoint 97 or
the 32-bit PowerPoint Viewer.)
•Musical Instrument Digital Interface (*.midi, *.mid, *.rmi)
•Unix Environment (*.au, *.snd)
•Microsoft Wave (*.wav)
•Microsoft Streaming Format (*.asf, *.asx)
•CDAudio (*.cda)
Once you get it into a desired format...you can insert it into your
presentation by going to Insert > Sound from File. To play accross multiple
slides, see this:
"Play sounds across multiple slides (A WAV runs through it)"
http://www.rdpslides.com/pptfaq/FAQ00047.htm