I couldn't get my mp3's to play so I converted them to wav's and their size multiplied by 10 (but they play).
And rogue, I think only wav's come even close to 512kbps, my 32kbps mp3's won't play at all. Maybe it has to be over 128kbps? Iunno, I don't feel like figuring it out right now
And pickles, sample rate speeds up or slows down the sound. That's how you get really really fast/slow versions of songs