diff --git a/cmake/BuildType.cmake b/cmake/BuildType.cmake
index 03ebc34e0..56ba5f09b 100644
--- a/cmake/BuildType.cmake
+++ b/cmake/BuildType.cmake
@@ -10,8 +10,8 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
     message(STATUS "Setting build type to '${default_build_type}' as none was specified.")
     set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
         STRING "Choose the type of build." FORCE)
-endif()
 
-# Set the possible values of build type for cmake-gui
-set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
+    # Set the possible values of build type for cmake-gui
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
     "MinSizeRel" "RelWithDebInfo")
+endif()
diff --git a/cmake/SfizzConfig.cmake b/cmake/SfizzConfig.cmake
index 9f8bb462c..8d0e2fe91 100644
--- a/cmake/SfizzConfig.cmake
+++ b/cmake/SfizzConfig.cmake
@@ -41,7 +41,7 @@ endif()
 
 # Process sources as UTF-8
 if(MSVC)
-    add_compile_options("/utf-8")
+    add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/utf-8>)
 endif()
 
 # Define the math constants everywhere
@@ -104,7 +104,7 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
         endif()
     endif()
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-    add_compile_options(/Zc:__cplusplus)
+    add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/Zc:__cplusplus>)
     set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
 endif()
 
diff --git a/external/st_audiofile/src/st_audiofile.c b/external/st_audiofile/src/st_audiofile.c
index 1abc51dae..d29f6a2b7 100644
--- a/external/st_audiofile/src/st_audiofile.c
+++ b/external/st_audiofile/src/st_audiofile.c
@@ -9,6 +9,9 @@
 #include "st_audiofile_libs.h"
 #include <stdlib.h>
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
 #define WAVPACK_MEMORY_ASSUMED_VERSION 5
 
 struct st_audio_file {
@@ -179,10 +182,17 @@ static st_audio_file* st_generic_open_file(const void* filename, int widepath)
 
     // Try WV
     {
-        af->wv =
 #if defined(_WIN32)
-            WavpackOpenFileInput((const char*)filename, NULL, OPEN_FILE_UTF8, 0);
+        // WavPack expects an UTF8 input and has no widechar api, so we convert the filename back...
+        unsigned wsize = wcslen(filename);
+        unsigned size = WideCharToMultiByte(CP_UTF8, 0, filename, wsize, NULL, 0, 0, NULL, NULL);
+        char *buffer = (char*)malloc((size+1) * sizeof(char));
+        WideCharToMultiByte(CP_UTF8, 0, filename, wsize, buffer, size, NULL, NULL);
+        buffer[size] = '\0';
+        af->wv =
+            WavpackOpenFileInput(buffer, NULL, OPEN_FILE_UTF8, 0);
 #else
+        af->wv =
             WavpackOpenFileInput((const char*)filename, NULL, 0, 0);
 #endif
         if (af->wv) {
diff --git a/src/sfizz/FilePool.cpp b/src/sfizz/FilePool.cpp
index e15be0f40..76fd69b7b 100644
--- a/src/sfizz/FilePool.cpp
+++ b/src/sfizz/FilePool.cpp
@@ -477,7 +477,7 @@ void sfz::FilePool::loadingJob(const QueuedFileData& data) noexcept
     AudioReaderPtr reader = createAudioReader(file, id->isReverse(), &readError);
 
     if (readError) {
-        DBG("[sfizz] libsndfile errored for " << *id << " with message " << readError.message());
+        DBG("[sfizz] reading the file errored for " << *id << " with code " << readError << ": " << readError.message());
         return;
     }