You can read data and store them in memory while playing. The same trick can apply to all digital formats. Engineer can design that way, actually those portable sport CD player is kind of like that. That's not for MP3 only. MP3 has less data therefore easier to put more song in the moving free memory. However, it contains less information also. With less data, there is no way for it to beat CD even. It is the "free" download which could kill other format's market not its sound quality. Low quality product beats better quality stuff by its price! Like a fast food store can take many cooks' job. Ah Men! Enjoy your hamburger, I like sea food!
