It kind of sounds Kingdom Heartsy, doesn't it!! But I tend to see my OTP's etc in every song I hear so maybe not the best person to ask 8D

If you want to upload it to tumblr, you can use itunes to convert them :3 if you go itunes > edit > preferences > general, then 'import settings' then 'import using' and then select 'mp3 encoder'.

Then you can right-click a song in itunes and 'create mp3 version' should be an option :3

But if you can't be bothered or don't want to muck around with your itunes then that's okay!