Issues

• Direct wdmks support on windows

  celtera/libremidi#266 · Filter by author jcelerier opened on Oct 11, 2026

• winmidi: get_port() searches only group terminal blocks, so every function-block-derived port is unopenable (and MIDI 2.0 devices enumerate twice)

  celtera/libremidi#254 · Filter by author Psychlist1972 opened on Sep 7, 2026
  1

• WinMM: midi_out_winmm::outHandle is never initialized, so the destructor can call midiOutClose on an indeterminate handle

  celtera/libremidi#253 · Filter by author Psychlist1972 opened on Sep 7, 2026

• Heads-up + migration guide: Microsoft.Windows.Devices.Midi2 is becoming the in-box Windows.Devices.Midi2

  celtera/libremidi#252 · Filter by author Psychlist1972 opened on Sep 7, 2026

• [Perf] Windows/WinMM: default observer calls midiInGetDevCaps/midiOutGetDevCaps for every device every 100 ms, even when no callbacks are registered

  celtera/libremidi#251 · Filter by author Psychlist1972 opened on Sep 7, 2026
  6

• Doesn't compile with C++23 because of std::aligned_storage

  celtera/libremidi#238 · Filter by author s9w opened on Jul 25, 2026
  1

• WMS COM path: on_bytes drops batched UMP packets, should use on_bytes_multi

  celtera/libremidi#234 · Filter by author osonseth opened on Jul 15, 2026
  3

• MCU protocol for LCD does not use newline

  celtera/libremidi#224 · Filter by author tschiemer opened on Jul 7, 2026
  3

• Dependency Dashboard

  celtera/libremidi#222 · Filter by author jcelerier opened on Jul 3, 2026

• Hang on midi_out::close_port after sending a long message.

  celtera/libremidi#218 · Filter by author TrevorCash opened on Jun 11, 2026

• Remove system calls from Jack callbacks

  celtera/libremidi#213 · Filter by author theozanellato opened on May 19, 2026
  2

• pylibremidi not building on linux

  celtera/libremidi#212 · Filter by author JonathanTaquet opened on Apr 22, 2026

• winmidi: observer returns only USB group terminal blocks

  Bug

  celtera/libremidi#200 · Filter by author atsushieno opened on Mar 18, 2026
  13

  

• Can't get input with pylibremidi

  Bug

  celtera/libremidi#190 · Filter by author Maboroshy opened on Jan 13, 2026
  25

  

• feature request: Node.JS bindings

  Feature

  celtera/libremidi#159 · Filter by author dopry opened on Jun 2, 2025

• Create a test case building on the CI with vcpkg

  Feature

  celtera/libremidi#151 · Filter by author totalgee opened on Apr 2, 2025
  4

• Tests midiin_test, midiout_test fail: FAILED: REQUIRE( in.get_current_api() == libremidi::midi1::default_api() )

  Bug

  celtera/libremidi#144 · Filter by author yurivict opened on Mar 13, 2025
  2

  

• Support for native BSD backends

  Feature

  celtera/libremidi#85 · Filter by author jcelerier opened on Sep 24, 2023 · 6.0
  3