Thanks for the response. I generally use Windows Media Player, but have tried others with these particular files with no luck.

That being said, I DID follow some advice elsewhere in this forum since my earlier post and downloaded the player from videolan.org and, voila, it plays the files in question just fine!

Meanwhile, I will check into those web sites you suggested and see if I can improve my knowledge and my media capabilities at the same time.

Thanks again! JACK