Labels

Requires an SO version bump; cannot ship in a minor release

Linux ALSA sequencer

Android AMidi

macOS / iOS CoreMIDI

iOS (CoreMIDI on iOS)

JACK (Linux and macOS)

Windows UWP

Web MIDI / Emscripten

Windows Multimedia

Windows MIDI Services

CMake, Autotools, packaging

The C wrapper (rtmidi_c.h / rtmidi_c.cpp)

C++11 compatibility floor; language-level constraints

README, tutorials, and build instructions

Port discovery, naming, and change detection

A feature request with incomplete or no implementation offfered.

Small, well-scoped, good entry point for a first contribution

Maintainers would welcome someone taking this on

MIDI 2.0 / UMP related

Cannot be resolved without a specific MIDI device

System Exclusive handling, chunking, large transfers

Races, locking, concurrent access

Timestamps, latency, and clock behaviour

Tracking issue for a larger effort; holds design discussion and child links

Virtual / software port creation and connection