diff --git a/ports/MSVC++/2015/uwp/libmpg123.sln b/ports/MSVC++/2015/uwp/libmpg123.sln
index 6e4eaee..ecedd3d 100644
--- a/ports/MSVC++/2015/uwp/libmpg123.sln
+++ b/ports/MSVC++/2015/uwp/libmpg123.sln
@@ -8,21 +8,27 @@ EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|ARM = Debug|ARM
+		Debug|ARM64 = Debug|ARM64
 		Debug|x64 = Debug|x64
 		Debug|x86 = Debug|x86
 		Release|ARM = Release|ARM
+		Release|ARM64 = Release|ARM64
 		Release|x64 = Release|x64
 		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|ARM.ActiveCfg = Debug|ARM
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|ARM.Build.0 = Debug|ARM
+		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|ARM64.Build.0 = Debug|ARM64
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|x64.ActiveCfg = Debug|x64
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|x64.Build.0 = Debug|x64
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|x86.ActiveCfg = Debug|Win32
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Debug|x86.Build.0 = Debug|Win32
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Release|ARM.ActiveCfg = Release|ARM
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Release|ARM.Build.0 = Release|ARM
+		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Release|ARM64.ActiveCfg = Release|ARM64
+		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Release|ARM64.Build.0 = Release|ARM64
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Release|x64.ActiveCfg = Release|x64
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Release|x64.Build.0 = Release|x64
 		{2411FC2F-79ED-4787-A143-DE3644B0FBF5}.Release|x86.ActiveCfg = Release|Win32
diff --git a/ports/MSVC++/2015/uwp/libmpg123/libmpg123.vcxproj b/ports/MSVC++/2015/uwp/libmpg123/libmpg123.vcxproj
index 0e54f92..91f40db 100644
--- a/ports/MSVC++/2015/uwp/libmpg123/libmpg123.vcxproj
+++ b/ports/MSVC++/2015/uwp/libmpg123/libmpg123.vcxproj
@@ -5,6 +5,10 @@
       <Configuration>Debug</Configuration>
       <Platform>ARM</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
       <Platform>Win32</Platform>
@@ -17,6 +21,10 @@
       <Configuration>Release</Configuration>
       <Platform>ARM</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Release|Win32">
       <Configuration>Release</Configuration>
       <Platform>Win32</Platform>
@@ -76,6 +84,8 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\..\..\..\..\src\libmpg123\equalizer.c" />
     <ClCompile Include="..\..\..\..\..\src\libmpg123\feature.c" />
@@ -105,6 +115,8 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\..\..\..\..\src\libmpg123\synth_real.c" />
     <ClCompile Include="..\..\..\..\..\src\libmpg123\synth_s32.c" />
@@ -206,6 +218,11 @@
     <UseDebugLibraries>true</UseDebugLibraries>
     <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
@@ -221,6 +238,11 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
@@ -240,9 +262,15 @@
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
@@ -273,6 +301,15 @@
     <IgnoreImportLibrary>false</IgnoreImportLibrary>
     <LinkIncremental>false</LinkIncremental>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <GenerateManifest>false</GenerateManifest>
+    <IgnoreImportLibrary>false</IgnoreImportLibrary>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <GenerateManifest>false</GenerateManifest>
+    <IgnoreImportLibrary>false</IgnoreImportLibrary>
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <GenerateManifest>false</GenerateManifest>
     <IgnoreImportLibrary>false</IgnoreImportLibrary>
@@ -497,6 +534,48 @@ yasm -a x86 -p gas -r raw -f win32 -g null -m x86 -o "$(IntDir)synth_stereo_sse_
       </Command>
     </PreLinkEvent>
   </ItemDefinitionGroup>
+<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|arm64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <CompileAsWinRT>false</CompileAsWinRT>
+      <AdditionalIncludeDirectories>$(ProjectDir)..\..\..;$(ProjectDir)..\..\..\..\..\src;$(ProjectDir)..\..\..\..\..\src\libmpg123;$(ProjectDir)..\..\..\..\..\src\compat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_CRT_SECURE_NO_WARNINGS;BUILD_MPG123_DLL;OPT_MULTI;OPT_GENERIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <CompileAs>CompileAsC</CompileAs>
+      <DisableSpecificWarnings>4996;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
+      <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
+      <AdditionalLibraryDirectories>$(OutDir)</AdditionalLibraryDirectories>
+      <LinkTimeCodeGeneration>Default</LinkTimeCodeGeneration>
+    </Link>
+    <PreLinkEvent>
+      <Command>
+      </Command>
+    </PreLinkEvent>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|arm64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <CompileAsWinRT>false</CompileAsWinRT>
+      <AdditionalIncludeDirectories>$(ProjectDir)..\..\..;$(ProjectDir)..\..\..\..\..\src;$(ProjectDir)..\..\..\..\..\src\libmpg123;$(ProjectDir)..\..\..\..\..\src\compat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_CRT_SECURE_NO_WARNINGS;BUILD_MPG123_DLL;OPT_MULTI;OPT_GENERIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <CompileAs>CompileAsC</CompileAs>
+      <DisableSpecificWarnings>4996;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
+      <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
+      <AdditionalLibraryDirectories>$(OutDir)</AdditionalLibraryDirectories>
+    </Link>
+    <PreLinkEvent>
+      <Command>
+      </Command>
+    </PreLinkEvent>
+  </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>