rtmidi: rtmidi (C++ classes to provide a common API for realtime MIDI I/O) rtmidi: rtmidi: RtMidi is a set of C++ classes (RtMidiIn, RtMidiOut, and API specific rtmidi: classes) that provide platform-indepoendent API for realtime MIDI rtmidi: input/output. rtmidi: RtMidi significantly simplifies the process of interacting with rtmidi: computer MIDI hardware and software. rtmidi: rtmidi: rtmidi: rtmidi home: https://www.music.mcgill.ca/~gary/rtmidi/ rtmidi: