The 33 1/3 second mystery #16
 

When using it, it used to be on top, you got to it from the outside moving towards the center, and the speed was constant. Now it's on the bottom, you get to it from the center moving outwards, and it slows down the longer it runs. What is it?

a record

Although I was actually seeking "the music" as an answer, after a heated discussion with the judges who are shackled in a corner of my basement, Lotronex gets the latest fuzzy bunny.