Customize menu > Preferences > Preference Settings dialog > Animation tab > MIDI Time Slider Control group > Setup button
With the MIDI Time Slider Control Setup dialog you can specify and set up a MIDI device to control animation playback.

Presets—Specifies the type of MIDI device used. You can choose the Media Control Station 2, which is a MIDI device containing standard VCR-style playback buttons along with a jog wheel, or you can choose Custom, which specifies note events in the spinners. You can also use Custom to customize the buttons used by the Media Control Station.
Channel—Specifies the channel to which your MIDI device is assigned.
With the controls in this group you can specify which note event triggers which function.
Start Frame—Goes to the start frame (the Rewind button in the Media Control Station).
End Frame—Goes to the end frame (the Fast-Forward button in the Media Control Station).
Step Forward—Moves one frame forward (the Fast-Forward button and Option button in the Media Control Station).
Step Backward—Moves one frame back (the Rewind button and Option button in the Media Control Station).
Stop—Stops playback (the square button).
Play—Plays the animation (the arrow button).
Jog Wheel—Controls the time slider with the jog wheel.
Sensitivity—Controls the number of ticks that the time slider moves in response to one unit of movement from the jog wheel. A lower value provides more precise positioning of the time slider, while a higher value makes the time slider move faster. If you set your time display to show ticks and set the sensitivity to 1, you can move one tick at a time with the jog wheel.