Bill does the sound at his church and when he uses burned CDs, they won't work with his players. Leo says that there's more than one way to burn a disc. He can burn a disc by dragging files onto a CD, and if he doesn't finalize them, they won't be usable. If it's a data disc, it may play on a computer, but not a CD player. It's not a perfect art. But the key is to be sure it's burned properly.