Ok, this question came up because my uncle gave my mom a cd, that would only play on something thats plays mp3's. And i wondered why he would do that, instead of just putting it into a format that can be played by all devices.
I have all mp3's that i have downloaded, but I always burn them onto a cd so they can be played anywhere.
So as I said before, why would you put it in this format, and how do you do it?