A Python binding for the RtMidi C++ library implemented using Cython.
RtMidi is a set of C++ classes which provides a concise and simple, cross-platform API (Application Programming Interface) for realtime MIDI input / output across Linux (ALSA & JACK), macOS / OS X (CoreMIDI & JACK), and Windows (MultiMedia System) operating systems.
python-rtmidi is a Python binding for RtMidi implemented using Cython and provides a thin wrapper around the RtMidi C++ interface. The API is basically the same as the C++ one but with the naming scheme of classes, methods and parameters adapted to the Python PEP-8 conventions and requirements of the Python package naming structure. python-rtmidi supports Python 3 (3.6, 3.7, 3.8, and 3.9).
The documentation provides installation instructions, a history of changes per release and an API reference.
See the file LICENSE.txt about copyright and usage terms.
The source code repository and issue tracker are hosted on GitHub:
https://github.com/SpotlightKid/python-rtmidi.
Here's a quick example of how to use python-rtmidi to open the first available MIDI output port and send a middle C note on MIDI channel 1:
import time
import rtmidi
midiout = rtmidi.MidiOut()
available_ports = midiout.get_ports()
if available_ports:
midiout.open_port(0)
else:
midiout.open_virtual_port("My virtual output")
with midiout:
note_on = [0x90, 60, 112] # channel 1, middle C, velocity 112
note_off = [0x80, 60, 0]
midiout.send_message(note_on)
time.sleep(0.5)
midiout.send_message(note_off)
time.sleep(0.1)
del midiout
More usage examples can be found in the examples and tests directories of the source repository.