I've been looking for a way to use my MIDI keyboard to play a Beatmania sim, and I've figured out to how do it so I'd like to share.
Download GlovePIE
HERE
Make sure your keyboard is on and hooked up to your computer before you run GlovePIE.
Copy and paste this script into GlovePIE and set the controls in game to match it. (I'm playing Be-Pachi Music)
Code:
// BPM MIDI Keyboard Controls
Key.R = MapRange(midi1.f4, 0,1, 0,1)
Key.T = MapRange(midi1.g4, 0,1, 0,1)
Key.Y = MapRange(midi1.a4, 0,1, 0,1)
Key.U = MapRange(midi1.b4, 0,1, 0,1)
Key.5 = MapRange(midi1.fsharp4, 0,1, 0,1)
Key.6 = MapRange(midi1.gsharp4, 0,1, 0,1)
Key.7 = MapRange(midi1.asharp4, 0,1, 0,1)
Key.Up = MapRange(midi.ModWheel, 0,1, 0,1)
If you don't have a modulation wheel you can change it to something like "midi1.c3" or whatever you'd like.
Hope this helps!
Using a MIDI Keyboard for Beatmania 
