This page is devoted to midi files. Shortly, those are only notes wich are played by your computer. That's why these files are much, much shorter than mp3 files. They are made by genious people who listened to song and wrote notes afterwards. It's really hard to do. Try it if you don't believe me! :) If you don't have GMS that can play mp3 files but only polyphonic melodies - you can use these files, just upload to your mobile phone and enjoy it!