#!/usr/bin/env python

#

# noteon2osc.py

#

"""Send an OSC message when a MIDI Note On message is received."""

import sys

import time

import liblo

from rtmidi.midiconstants import NOTE_ON

from rtmidi.midiutil import open_midiinput

def midiin_callback(event, data=None):

message, deltatime = event

if message[0] & 0xF0 == NOTE_ON:

status, note, velocity = message

channel = (status & 0xF) + 1

liblo.send(

('localhost', 9001),

'/midi/%i/noteon' % channel,

note,

velocity)

try:

# Prompts user for MIDI input port, unless a valid port number or name

# is given as the first argument on the command line.

# API backend defaults to ALSA on Linux.

port = sys.argv[1] if len(sys.argv) > 1 else None

with open_midiinput(port, client_name='noteon2osc')[0] as midiin:

midiin.set_callback(midiin_callback)

while True:

time.sleep(1)

except (EOFError, KeyboardInterrupt):

print("Bye.")