Install librtmidi-doc by entering the following commands in the terminal:
sudo apt update sudo apt install librtmidi-doc
Description:
C++ library for realtime MIDI input/ouput (documentation files)
RtMidi is a set of C++ classes that provides a common API (Application Programming Interface) for realtime MIDI input/output across Linux (native ALSA, JACK, and OSS), Macintosh OS X, SGI, and Windows (DirectSound and ASIO) operating systems. RtMidi significantly simplifies the process of interacting with computer audio hardware. . This package provides the API documentation.
Homepage: http://www.music.mcgill.ca/~gary/rtmidi/
Version: 3.0.0~ds1-2
Section: universe/doc