diff --git a/CMakeLists.txt b/CMakeLists.txt
index 29686524..8030a21b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -141,7 +141,7 @@ add_executable(sfizz_tests ${TEST_SOURCES} ${COMMON_SOURCES})
 if(UNIX)
     target_link_libraries(sfizz_tests stdc++fs)
 endif(UNIX)
-target_link_libraries(sfizz_tests Catch2::Catch2 absl::strings absl::flat_hash_map sndfile readerwriterqueue cnpy-static absl::span absl::algorithm)
+target_link_libraries(sfizz_tests Catch2::Catch2 absl::strings absl::str_format absl::flat_hash_map sndfile readerwriterqueue cnpy-static absl::span absl::algorithm)
 target_include_directories(sfizz_tests SYSTEM PRIVATE sources)
 file(COPY "tests" DESTINATION ${CMAKE_BINARY_DIR})
 
diff --git a/external/spdlog b/external/spdlog
new file mode 160000
index 00000000..139c0d13
--- /dev/null
+++ b/external/spdlog
@@ -0,0 +1 @@
+Subproject commit 139c0d135f303946bd542a9bc2d6b18d6a7415bb
diff --git a/sources/Synth.cpp b/sources/Synth.cpp
index 591de443..4544ff84 100644
--- a/sources/Synth.cpp
+++ b/sources/Synth.cpp
@@ -17,12 +17,14 @@ void sfz::Synth::callback(std::string_view header, const std::vector<Opcode>& me
         // We shouldn't have multiple global headers in file
         ASSERT(!hasGlobal);
         globalOpcodes = members;
+        handleGlobalOpcodes(members);
         hasGlobal = true;
         break;
     case hash("control"):
         // We shouldn't have multiple control headers in file
         ASSERT(!hasControl)
         hasControl = true;
+        handleControlOpcodes(members);
         break;
     case hash("master"):
         masterOpcodes = members;