rtmidi-python

Python wrapper for RtMidi_, the lightweight, cross-platform MIDI I/O library. For Linux, Mac OS X and Windows.

Installation

On Windows, the preferred way is to use one of the precompiled binaries available from PyPI_. On Linux and Mac OS X, the easiest way to install rtmidi-python is using pip::

pip install rtmidi-python

Alternatively, you can build the module from source as follows::

python setup.py install

If you want to build from the Cython_ source, make sure that you have a recent version of Cython (>= 0.17), and run::

python setup.py install --from-cython

Usage Examples

rtmidi-python uses the same API as RtMidi_, only reformatted to comply with PEP-8, and with small changes to make it a little more pythonic.

Print all output ports

::

    import rtmidi_python as rtmidi

    midi_out = rtmidi.MidiOut()
    for port_name in midi_out.ports:
        print port_name

Send messages

::

import rtmidi_python as rtmidi

midi_out = rtmidi.MidiOut()
midi_out.open_port(0)

midi_out.send_message([0x90, 48, 100]) # Note on
midi_out.send_message([0x80, 48, 100]) # Note off

Get incoming messages by polling

::

    import rtmidi_python as rtmidi

    midi_in = rtmidi.MidiIn()
    midi_in.open_port(0)

    while True:
        message, delta_time = midi_in.get_message()
        if message:
            print message, delta_time

Note that the signature of ``get_message()`` differs from the original
`RtMidi`_ API: It returns a tuple instead of using a return parameter.

Get incoming messages using a callback

::

import rtmidi_python as rtmidi

def callback(message, time_stamp):
    print message, time_stamp

midi_in = rtmidi.MidiIn()
midi_in.callback = callback
midi_in.open_port(0)

# do something else here (but don't quit)

Note that the signature of the callback differs from the original RtMidi_ API: message is now the first parameter, like in the tuple returned by get_message().

License

rtmidi-python is licensed under the MIT License, see LICENSE.

It uses RtMidi_, licensed under a modified MIT License, see RtMidi/RtMidi.h.

.. _RtMidi: http://www.music.mcgill.ca/~gary/rtmidi/ .. _PyPI: https://pypi.python.org/pypi/rtmidi-python#downloads .. _Cython: http://www.cython.org