globalToMidi.py

import pyHook, pythoncom
import rtmidi_python as rtmidi

# this app will list all MIDI devices and associated numbers
# Pick the correct number associated, and restart the app.
MIDI_DEVICE = 1

# key codes helpers
KP_7 = 103
KP_8 = 104
KP_9 = 105
KP_4 = 100
KP_5 = 101
KP_6 = 102
KP_1 = 97
KP_2 = 98
KP_3 = 99

# Key to Midi note mapping, all other keys are ignored
Key = { KP_7: 48,
        KP_8: 49,
        KP_9: 50,
        KP_4: 51,
        KP_5: 52,
        KP_6: 53,
        KP_1: 54,
        KP_2: 55,
        KP_3: 56
        }

def on_midi(code, midi, state):
    if not state[code]:
        state[code] = True
        try:
            midi.send_message([0x90, Key[code], 100])
        except KeyError:
            pass

def off_midi(code, midi, state):
    state[code] = False
    try:
        midi.send_message([0x80, Key[code], 100])
    except KeyError:
        pass

def on_key_construct(midi, state):
    def on_key(event):
        on_midi(event.KeyID, midi, state)
        return True
    return on_key

def off_key_construct(midi, state):
    def off_key(event):
        off_midi(event.KeyID, midi, state)
        return True
    return off_key

print "Available MIDI devices:"
midi = rtmidi.MidiOut()
for i, port in enumerate(midi.ports):
    print str(i) + ": " + port

print "Connecting to device: " + midi.ports[MIDI_DEVICE]
midi.open_port(MIDI_DEVICE)

state = {}

for x in range(256):
    state[x] = False

hookM = pyHook.HookManager()
hookM.KeyDown = on_key_construct(midi, state)
hookM.KeyUp = off_key_construct(midi, state)
hookM.HookKeyboard()
pythoncom.PumpMessages()