• Mainly fixes to the pypi distribution

Essentially the same as v5.4.0, simply with correct version number everywhere

• ALSA: observation will now slightly be delayed as otherwise udev fields are sometimes not populated yet.
• Port the Android backend from RtMidi, developed by @YellowLabrador.
• C++: add initial C++ modules support: import libremidi;. So far compilers other than Clang 20+ crash. Enable with -DLIBREMIDI_LIBRARY_MODE=MODULE. Note that one cannot mix a module-based and a non-module based API. An example is provided in examples/modules.cpp
• Add a utility libremidi::set_client_name / client_name function to simplify construction of an API object with a custom client name.
• Many improvements to MIDI 1 <-> MIDI 2 conversion, every MIDI 1 message is supported now.
• Port information: add as much metadata as we can get from the host API.
• Port information: remove sorting and comparison as there's no generally correct way to compare two port_information / input_port / output_port objects. Multiple ways of doing this comparison depending on the use case have been provided as examples in <libremidi/port_comparison.hpp>.
• Port information: added a heuristics-based libremidi::find_closest_port(query, existing_ports) utility function which tries to lookup the most likely candidate for a MIDI port across backends with the lookup information that can be provided.
• Python: add a pyproject.toml to facilitate integration with the Python ecosystem. Thanks @TheStaticTurtle!
• Windows MIDI Services: support updated to the RC1 release headers.
• Windows MIDI Services: add support for the newly introduced COM fast-path to provide maximum performance.

Contributors

• @TheStaticTurtle
• @YellowLabrador

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libremidi is a modern C++ MIDI 1 / MIDI 2 real-time & file I/O library. It supports Windows, macOS, Linux, FreeBSD and WebMIDI.

Release 5.3.1 is a bugfix-only release.

Full Changelog: v5.3.0...v5.3.1

• The only fixes are for build system issues on some platforms.
• An example of converting a .mid file to simple drum-machine patterns format (http://github.com/jcelerier/drum-patterns) have been introduced, as a larger example of the file reading / writing API.

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libremidi is a modern C++ MIDI 1 / MIDI 2 real-time & file I/O library. It supports Windows, macOS, Linux, FreeBSD and WebMIDI.

Release 5.3.0 is a bugfix-only release.

Full Changelog: v5.2.0...v5.3.0

• udev: replace potential nullptrs by empty strings as we cannot construct std::string with a null const char* by @jcelerier in #155
• cmake: allow using system-installed readerwriterqueue by @alebcay in #157
• MinGW CI by @jcelerier in #162

New Contributors

• @alebcay made their first contribution in #157. Thanks!!

Contributors

• @jcelerier
• @alebcay

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New features

• PipeWire: implement UMP backend with the PipeWire 1.4 UMP support
• JACK: implement UMP backend with the PipeWire 1.4 UMP support
• ALSA: fill what information we can gather from udev to enable identifying the ports

Full Changelog: v5.0.1...v5.1.0

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New features

• Use stdx::error for error reporting until C++26 and std::error are widely available :-)
• Hunt exceptions down
• MIDI 2 support on Windows with the Windows MIDI Services.
  • Using Developer Preview 9: https://github.com/microsoft/MIDI/releases/
  • Works on both MSVC and MinGW / MSYS2.
• WinUWP support on MinGW / MSYS2.
• Getters for USB location, etc. in libremidi::port_information.
• Reverse-engineered implementation of Mackie Control Universal & Logic Control protocols. Tested with TouchMCU and a BCF2000.
• C API for bindings to other languages (libremidi-c.h).
• Python binding.
• Haskell binding courtesy of @ejconlon λ!
• Java binding courtesy of @atsushieno!
• Support for getting raw, unfiltered MIDI data (e.g. no SYSEX recombination logic).
• Computer Keyboard backend to easily map scancodes to keyboard-like MIDI maps ⌨.
• Network backend to send MIDI 1 and UMP packets over OSC 🛜.
• libremidi finally supports MIDI 2 on all desktop platforms 🎉!

Contributors

• @ejconlon
• @atsushieno

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New features

• Remade and extended the documentation: https://celtera.github.io/libremidi
• Experimental PipeWire back-end

Changes

• MIDI 1 logic refactored across all back-ends to make sure they all behave exactly the same wrt timestamping and filtering.

New features

• Add Debian (bullseye, bookworm, trixie) to the CI to make sure ALSA UMP and RawMidi support gets tested
• Fix iOS support and add iOS CI (thanks @fwcd !)
• Add compatibility with ni-midi2: the libremidi::ump type will convert automatically from / to midi::universal_packet and it is possible to send directly some ni-midi2 data types through libremidi::midi_out
• Added an example of very basic MIDI-CI interoperation with MIDI2.0Workbench: https://github.com/jcelerier/libremidi/blob/master/examples/midi2_interop.cpp
• Observer: add a track_any flag to track MIDI ports that are not reported as being hardware or software.
• UMP: allow send_ump to handle UMP streams, not only single UMP packets.

Bugfixes

• Fix sysex concatenation on WinMM
• Various MIDI 2-related fixes across the entire stack
• Work-in-progress on RawMidi MIDI2 backend - output should work, input not there yet. Testing and reporting issues highly appreciated!
• Some compatibility bugfixes, better detection of available features in cmake

Other

• Revamp and cleanup the cmake backends in separate files for clarity.

Contributors

• @fwcd

• Improvements to timing handling:

  • Added a Custom timestamping mechanism which allows the user to provide a custom callback to run timestamping as close as possible to the event's reception.
  • Added midi_in::absolute_timestamp() to get the origin timestamp for driver-provided ticks as accurately as possible.
    • e.g. in practice this is taking the time just near the ALSA queue creation or WinMM MIDI open.

• Bugfixes in JACK

• Many warning fixes - thanks @lilggamegenius for the extensive work!

• Fix MIDI dump example - thanks @chdiesch!

• Add SOVERSION to dynamic library

Contributors

• @lilggamegenius
• @chdiesch