See comments in line.
You're right, I did download the music from the Internet using Windows Media
Player 9, and it does contain DRM.
If the media has DRM, it can not be used in PowerPoint. In a nutshell, the
copyright holder has not given you rights to use his/her work in such a way.
I installed the PFCMedia software and
when I tested it, the test did work. I could hear the music. But when I
tried to Process/Insert the music file onto the slide I got the 501 error.
That is as it should be. PFCMedia respects the copyright holders
requirements to limit how and where it may be used and it generated an error
just as it should. Simply put, if we removed the DRM we would be sued silly
by the copyright holder. But putting the legal ramifications aside, I
wouldn't do it. Hey, I wouldn't want people making copies of my work
without permission either. <g>