You can buy inexpensive needle drop music here:
http://www.cssmusic.com/index.cfm
Regarding playing music and voice over at the same time, it all comes to
setting your animation setting to run "with previous." Make sure you have
your music set to play across multiple slides (in drop down menu, Effect
Options > Effects Tab, set the number of slide to Stop Playing After __
Slides). You can enter audio clips on each slide for the voice over.
--
Sandy Johnson
Microsoft Certified Office Specialist (MOS PowerPoint)
"YS" wrote:
> How can I add background music & narration into my slideshow and have them
> play simultaneously? I am making a slideshow for a non-profit organization
> with a very low budget. The slideshow will show to the public, so are there
> any sites that I can find music that are not subject to copyright?
>
> --
> YS