diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index cf3fd622..d0a310c0 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -24,7 +24,7 @@ jobs:
             name: "Windows (MSVC)",
             os: windows-latest,
             generator: "",
-            cmakeflags: "-DLIBREMIDI_NO_WINUWP=0 -DBOOST_ROOT=$PWD/boost_1_86_0 -DCMAKE_GENERATOR_PLATFORM=version=10.0.22621.0",
+            cmakeflags: "-DLIBREMIDI_NO_WINUWP=0 -DBOOST_ROOT=$PWD/boost_1_86_0",
             test_target: "RUN_TESTS",
             tests: 1,
             examples: 1
@@ -33,7 +33,7 @@ jobs:
             name: "Windows (MSVC, arm64)",
             os: windows-11-arm,
             generator: "",
-            cmakeflags: "-DLIBREMIDI_NO_WINUWP=0 -DBOOST_ROOT=$PWD/boost_1_86_0 -DCMAKE_GENERATOR_PLATFORM=version=10.0.22621.0",
+            cmakeflags: "-DLIBREMIDI_NO_WINUWP=0 -DBOOST_ROOT=$PWD/boost_1_86_0",
             test_target: "RUN_TESTS",
             tests: 1,
             examples: 1
diff --git a/.github/workflows/build_python.yml b/.github/workflows/build_python.yml
index 53fc7624..3d00b227 100644
--- a/.github/workflows/build_python.yml
+++ b/.github/workflows/build_python.yml
@@ -23,7 +23,7 @@ jobs:
             name: "Windows (MSVC)",
             os: windows-latest,
             generator: "",
-            cmakeflags: "-DLIBREMIDI_NO_WINUWP=0 -DBOOST_ROOT=$PWD/boost_1_86_0 -DCMAKE_GENERATOR_PLATFORM=version=10.0.22621.0",
+            cmakeflags: "-DLIBREMIDI_NO_WINUWP=0 -DBOOST_ROOT=$PWD/boost_1_86_0",
             environment: ""
           }
         - {
diff --git a/cmake/libremidi.winmidi.cmake b/cmake/libremidi.winmidi.cmake
index 0b6e74c4..7da5485f 100644
--- a/cmake/libremidi.winmidi.cmake
+++ b/cmake/libremidi.winmidi.cmake
@@ -5,7 +5,7 @@ endif()
 if(LIBREMIDI_DOWNLOAD_CPPWINRT)
   if(NOT EXISTS "${CMAKE_BINARY_DIR}/winmidi-headers.zip")
     file(DOWNLOAD
-      https://github.com/microsoft/MIDI/releases/download/dev-preview-9-namm-4/Microsoft.Windows.Devices.Midi2.1.0.2-preview-9.250121-1820.nupkg
+      https://github.com/microsoft/MIDI/releases/download/rc-1/Microsoft.Windows.Devices.Midi2.1.0.14-rc.1.209.nupkg
       "${CMAKE_BINARY_DIR}/winmidi-headers.zip"
     )
   endif()
@@ -52,6 +52,9 @@ if(CPPWINRT_TOOL)
   file(
     COPY
       "${CMAKE_BINARY_DIR}/winmidi-headers/build/native/include/winmidi/init"
+      "${CMAKE_BINARY_DIR}/winmidi-headers/build/native/include/winmidi/WindowsMidiServicesAppSdkComExtensions.h"
+      "${CMAKE_BINARY_DIR}/winmidi-headers/build/native/include/winmidi/WindowsMidiServicesAppSdkComExtensions_i.c"
+      "${CMAKE_BINARY_DIR}/winmidi-headers/build/native/include/winmidi/WindowsMidiServicesAppSdkComExtensions_p.c"
     DESTINATION
       "${CMAKE_BINARY_DIR}/cppwinrt-winmidi/"
   )
diff --git a/include/libremidi/backends/winmidi/helpers.hpp b/include/libremidi/backends/winmidi/helpers.hpp
index 15ea3b07..f2150baa 100644
--- a/include/libremidi/backends/winmidi/helpers.hpp
+++ b/include/libremidi/backends/winmidi/helpers.hpp
@@ -8,6 +8,7 @@
 #include <cctype>
 #include <string>
 #include <guiddef.h>
+#include <unknwn.h>
 
 #include <winrt/Windows.Foundation.h>
 #include <winrt/Windows.Foundation.Collections.h>
@@ -15,6 +16,19 @@
 #include <winrt/Microsoft.Windows.Devices.Midi2.h>
 #include <libremidi/cmidi2.hpp>
 
+#if __has_include(<WindowsMidiServicesAppSdkComExtensions.h>)
+#include <WindowsMidiServicesAppSdkComExtensions.h>
+  #define LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS 1
+
+#define LIBREMIDI_DEFINE_GUID_CONSTEXPR(type,name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
+        static constexpr const type name = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
+
+namespace libremidi {
+  LIBREMIDI_DEFINE_GUID_CONSTEXPR(IID, IID_IMidiEndpointConnectionMessagesReceivedCallback,0x8087b303,0x0519,0x31d1,0x31,0xd1,0x00,0x00,0x00,0x00,0x00,0x10);
+  LIBREMIDI_DEFINE_GUID_CONSTEXPR(IID, IID_IMidiEndpointConnectionRaw,0x8087b303,0x0519,0x31d1,0x31,0xd1,0x00,0x00,0x00,0x00,0x00,0x20);
+}
+#endif
+
 // MinGW support
 #if !defined(_MSC_VER)
 namespace Microsoft::Windows::Devices::Midi2::Initialization
diff --git a/include/libremidi/backends/winmidi/midi_in.hpp b/include/libremidi/backends/winmidi/midi_in.hpp
index 899c56de..2906f23b 100644
--- a/include/libremidi/backends/winmidi/midi_in.hpp
+++ b/include/libremidi/backends/winmidi/midi_in.hpp
@@ -19,6 +19,56 @@ class midi_in_impl final
   {
   } configuration;
 
+#if LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
+  struct raw_callback_type final : IMidiEndpointConnectionMessagesReceivedCallback
+  {
+    explicit raw_callback_type(midi_in_impl& self)
+        : self{self}
+    {
+
+    }
+
+    midi_in_impl& self;
+    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject) override
+    {
+      if (!ppvObject)
+        return E_POINTER;
+
+      if (riid == __uuidof(IUnknown) ||
+          riid == libremidi::IID_IMidiEndpointConnectionMessagesReceivedCallback)
+      {
+        *ppvObject = static_cast<IMidiEndpointConnectionMessagesReceivedCallback*>(this);
+        AddRef();
+        return S_OK;
+      }
+
+      *ppvObject = nullptr;
+      return E_NOINTERFACE;
+    }
+
+    ULONG STDMETHODCALLTYPE AddRef() override
+    {
+      return 1;
+    }
+
+    ULONG STDMETHODCALLTYPE Release() override
+    {
+      return 1;
+    }
+
+    HRESULT STDMETHODCALLTYPE MessagesReceived(
+        GUID sessionId,
+        GUID connectionId,
+        UINT64 timestamp,
+        UINT32 wordCount,
+        UINT32 *messages) override {
+      HRESULT res{};
+      self.process_message(sessionId, connectionId, timestamp, wordCount, messages);
+      return res;
+    }
+  } raw_callback{*this};
+#endif
+
   explicit midi_in_impl(
       libremidi::ump_input_configuration&& conf, winmidi::input_configuration&& apiconf)
       : configuration{std::move(conf), std::move(apiconf)}
@@ -55,12 +105,20 @@ class midi_in_impl final
     // TODO use a MidiGroupEndpointListener for the filtering
     m_endpoint = m_session.CreateEndpointConnection(ep.EndpointDeviceId());
 
+#if !LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
     m_revoke_token = m_endpoint.MessageReceived(
         [this](
             const winrt::Microsoft::Windows::Devices::Midi2::IMidiMessageReceivedEventSource&,
             const winrt::Microsoft::Windows::Devices::Midi2::MidiMessageReceivedEventArgs& args) {
       process_message(args);
     });
+#else
+    m_endpoint.as(libremidi::IID_IMidiEndpointConnectionRaw, m_raw_endpoint.put_void());
+
+    m_raw_endpoint->SetMessagesReceivedCallback(
+        &raw_callback
+    );
+#endif
 
     m_endpoint.Open();
 
@@ -96,9 +154,43 @@ class midi_in_impl final
         {ump_space, ump_space + b.Size()}, m_processing.timestamp<timestamp_info>(to_ns, 0));
   }
 
+#if LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
+  void process_message(
+      const GUID& /* sessionId */,
+      const GUID& /* connectionId */,
+      UINT64 timestamp,
+      UINT32 wordCount,
+      UINT32 *ump)
+  {
+    static constexpr timestamp_backend_info timestamp_info{
+        .has_absolute_timestamps = true,
+        .absolute_is_monotonic = false,
+        .has_samples = false,
+    };
+
+    if(wordCount == 0)
+      return;
+
+    if (m_group_filter >= 0)
+    {
+      int group = cmidi2_ump_get_group(ump);
+      if (group != m_group_filter)
+        return;
+    }
+
+    auto to_ns = [t = timestamp] { return t; };
+    m_processing.on_bytes(
+        {ump, ump + wordCount}, m_processing.timestamp<timestamp_info>(to_ns, 0));
+  }
+#endif
+
   stdx::error close_port() override
   {
+#if !LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
     m_endpoint.MessageReceived(m_revoke_token);
+#else
+    m_raw_endpoint->RemoveMessagesReceivedCallback();
+#endif
     m_session.DisconnectEndpointConnection(m_endpoint.ConnectionId());
     return stdx::error{};
   }
@@ -109,6 +201,9 @@ class midi_in_impl final
   MidiSession m_session;
   winrt::event_token m_revoke_token{};
   winrt::Microsoft::Windows::Devices::Midi2::MidiEndpointConnection m_endpoint{nullptr};
+#if LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
+  winrt::impl::com_ref<IMidiEndpointConnectionRaw> m_raw_endpoint{};
+#endif
   midi2::input_state_machine m_processing{this->configuration};
   int m_group_filter = -1;
 };
diff --git a/include/libremidi/backends/winmidi/midi_out.hpp b/include/libremidi/backends/winmidi/midi_out.hpp
index 1937d248..577123e0 100644
--- a/include/libremidi/backends/winmidi/midi_out.hpp
+++ b/include/libremidi/backends/winmidi/midi_out.hpp
@@ -47,6 +47,9 @@ class midi_out_impl final
       return std::errc::address_not_available;
 
     m_endpoint = m_session.CreateEndpointConnection(ep.EndpointDeviceId());
+#if LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
+    m_endpoint.as(libremidi::IID_IMidiEndpointConnectionRaw, m_raw_endpoint.put_void());
+  #endif
     m_endpoint.Open();
 
     return stdx::error{};
@@ -61,6 +64,8 @@ class midi_out_impl final
   stdx::error send_ump(const uint32_t* message, size_t size) override
   {
     auto write_func = [this](const uint32_t* ump, int64_t bytes) -> std::errc {
+
+#if !LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
       MidiSendMessageResults ret{};
       switch (bytes / 4)
       {
@@ -80,9 +85,34 @@ class midi_out_impl final
         default:
           return std::errc::bad_message;
       }
-
       if (ret != MidiSendMessageResults::Succeeded)
         return std::errc::bad_message;
+  #else
+      HRESULT ret{};
+      switch (bytes / 4)
+      {
+        case 1:
+          assert( m_raw_endpoint->ValidateBufferHasOnlyCompleteUmps(1, (UINT32*)ump));
+          ret = m_raw_endpoint->SendMidiMessagesRaw(0, 1, (UINT32*)ump);
+          break;
+        case 2:
+          assert( m_raw_endpoint->ValidateBufferHasOnlyCompleteUmps(2, (UINT32*)ump));
+          ret = m_raw_endpoint->SendMidiMessagesRaw(0, 2, (UINT32*)ump);
+          break;
+        case 3:
+          assert( m_raw_endpoint->ValidateBufferHasOnlyCompleteUmps(3, (UINT32*)ump));
+          ret = m_raw_endpoint->SendMidiMessagesRaw(0, 3, (UINT32*)ump);
+          break;
+        case 4:
+          assert( m_raw_endpoint->ValidateBufferHasOnlyCompleteUmps(4, (UINT32*)ump));
+          ret = m_raw_endpoint->SendMidiMessagesRaw(0, 4, (UINT32*)ump);
+          break;
+        default:
+          return std::errc::bad_message;
+      }
+  #endif
+      if(ret < 0)
+        return std::errc::io_error;
       return std::errc{0};
     };
 
@@ -92,6 +122,9 @@ class midi_out_impl final
 private:
   MidiSession m_session;
   winrt::Microsoft::Windows::Devices::Midi2::MidiEndpointConnection m_endpoint{nullptr};
+#if LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
+  winrt::impl::com_ref<IMidiEndpointConnectionRaw> m_raw_endpoint{};
+#endif
 };
 
 }
diff --git a/include/libremidi/backends/winuwp/helpers.hpp b/include/libremidi/backends/winuwp/helpers.hpp
index 380e4586..e8e6253a 100644
--- a/include/libremidi/backends/winuwp/helpers.hpp
+++ b/include/libremidi/backends/winuwp/helpers.hpp
@@ -7,6 +7,7 @@
 #include <string>
 #include <thread>
 #include <vector>
+#include <unknwn.h>
 
 #include <winrt/Windows.Devices.Enumeration.h>
 #include <winrt/Windows.Devices.Midi.h>
diff --git a/include/libremidi/cmidi2.hpp b/include/libremidi/cmidi2.hpp
index 7148df4f..42ad4636 100644
--- a/include/libremidi/cmidi2.hpp
+++ b/include/libremidi/cmidi2.hpp
@@ -6,8 +6,10 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#if !defined(_MSC_VER)
 #pragma GCC system_header
 #pragma clang system_header
+#endif
 
 #define CMIDI2_MIDI_2_0_RESERVED 0
 #define CMIDI2_JR_TIMESTAMP_TICKS_PER_SECOND 31250
diff --git a/include/libremidi/error.hpp b/include/libremidi/error.hpp
index cf1bcf60..f8c30d96 100644
--- a/include/libremidi/error.hpp
+++ b/include/libremidi/error.hpp
@@ -1,11 +1,15 @@
 #pragma once
 #include <libremidi/config.hpp>
 
+#if !defined(_MSC_VER)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
 #pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
 #include <libremidi/system_error2.hpp>
+#if !defined(_MSC_VER)
 #pragma GCC diagnostic pop
+#endif
 
 #include <functional>
 #include <string_view>