MPC2000 Note Variation

I have never used it before and wanted to know how to use it, can it only be used with the sampled sounds or midi?

I am not new to the 2000 I just been using my MV for a min.

it can b used only on internal sounds BUT can b controlled by an external midi controller (u have to assign a midi cc to it)
it can be very useful for filter action, or if u assign it to the decay of an open hi hat, u can emulate the open\closed thang.

its nice also on the Tuning (u pitch shift the samle)

note that its not fully realtime, i mean:
the position of the slider when u trigger a sample will set the assigned parameter for that sample.
if u have a long sample and play it, then while it is playng u move the slider,u wont hear any change.it will affect the next time u trigger it.
hope it is clear,best thing is u try it urself and see what can \ cannot do.

a nice thing to use with midi devices is the note repeat function,that works both for internal and midi.
have fun