Music 1 is the most accurate music scheduler. The rotations you plan are the rotations you get on every song in each category. 

If you've worked with other music schedulers, no doubt you've wrestled with a problem like this: A Recent Hits category is set to get 45 spins a month. You call up a history and find one or two songs were scheduled 30 times last month and another was scheduled 55 times. You scratch your head and wonder why.

That kind of thing doesn't happen with Music 1