If I want to change the tempo of a beat. wouldent u be able typ change the bmp, and then change the cent pitch to an value and then get the same beat as before, just with slower tempo?
Half the original tempo is one octave below the original pitch.
For example: If the material is a bass guitar playing note E2 at 180 BPM, when you slow that track to 90 BPM the notes will be E1.
There are 100 cents per half step, and 12 half steps in an octave. So it's like a dynamic ratio. There is no set amount of cents that represents the the affect that slowing a track down by 1 BPM has on the pitch. It will be different every time. Here's a pretty bad-ass article that explains better and provides all the math you need:
