Midi Controller Knobs in Garageband
I'm going to be purchasing a midi controller pretty soon to use with Garageband (previously I've been using an old keyboard as a midi controller, but now want to get an actual controller.) Is there a midi controller that can use mapping to make the knobs on the controller work like the control knobs on the screen do in Garageband? And if so, what controller is it, and how would I go about mapping the knobs?
Thanks!