diff --git a/CMakeLists.txt b/CMakeLists.txt
index 752864354..d9f9ac92f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,9 +18,11 @@ set(CMAKE_PROJECT_VERSION_PATCH 7)
 
 if (ANDROID)
   set(BUILD_GUI_DEFAULT OFF)
+  set(USE_RTMIDI_DEFAULT OFF)
   set(SYSTEM_SDL2_DEFAULT ON)
 else()
   set(BUILD_GUI_DEFAULT ON)
+  set(USE_RTMIDI_DEFAULT ON)
   set(SYSTEM_SDL2_DEFAULT OFF)
 endif()
 
@@ -33,6 +35,7 @@ else()
 endif()
 
 option(BUILD_GUI "Build the tracker (disable to build only a headless player)" ${BUILD_GUI_DEFAULT})
+option(USE_RTMIDI "Build with MIDI support using RtMidi. Currently unfinished." ${USE_RTMIDI_DEFAULT})
 option(WITH_JACK "Whether to build with JACK support. Auto-detects if JACK is available" ${WITH_JACK_DEFAULT})
 option(SYSTEM_FMT "Use a system-installed version of fmt instead of the vendored one" OFF)
 option(SYSTEM_LIBSNDFILE "Use a system-installed version of libsndfile instead of the vendored one" OFF)
@@ -105,20 +108,22 @@ else()
   message(STATUS "Using vendored libsndfile")
 endif()
 
-if (SYSTEM_RTMIDI)
-  find_package(PkgConfig REQUIRED)
-  pkg_check_modules(RTMIDI REQUIRED rtmidi)
-  list(APPEND DEPENDENCIES_INCLUDE_DIRS ${RTMIDI_INCLUDE_DIRS})
-  list(APPEND DEPENDENCIES_COMPILE_OPTIONS ${RTMIDI_CFLAGS_OTHER})
-  list(APPEND DEPENDENCIES_LIBRARIES ${RTMIDI_LIBRARIES})
-  list(APPEND DEPENDENCIES_LIBRARY_DIRS ${RTMIDI_LIBRARY_DIRS})
-  list(APPEND DEPENDENCIES_LINK_OPTIONS ${RTMIDI_LDFLAGS_OTHER})
-  list(APPEND DEPENDENCIES_LEGACY_LDFLAGS ${RTMIDI_LDFLAGS})
-  message(STATUS "Using system-installed RtMidi")
-else()
-  add_subdirectory(extern/rtmidi EXCLUDE_FROM_ALL)
-  list(APPEND DEPENDENCIES_LIBRARIES rtmidi)
-  message(STATUS "Using vendored RtMidi")
+if (USE_RTMIDI)
+  if (SYSTEM_RTMIDI)
+    find_package(PkgConfig REQUIRED)
+    pkg_check_modules(RTMIDI REQUIRED rtmidi)
+    list(APPEND DEPENDENCIES_INCLUDE_DIRS ${RTMIDI_INCLUDE_DIRS})
+    list(APPEND DEPENDENCIES_COMPILE_OPTIONS ${RTMIDI_CFLAGS_OTHER})
+    list(APPEND DEPENDENCIES_LIBRARIES ${RTMIDI_LIBRARIES})
+    list(APPEND DEPENDENCIES_LIBRARY_DIRS ${RTMIDI_LIBRARY_DIRS})
+    list(APPEND DEPENDENCIES_LINK_OPTIONS ${RTMIDI_LDFLAGS_OTHER})
+    list(APPEND DEPENDENCIES_LEGACY_LDFLAGS ${RTMIDI_LDFLAGS})
+    message(STATUS "Using system-installed RtMidi")
+  else()
+    add_subdirectory(extern/rtmidi EXCLUDE_FROM_ALL)
+    list(APPEND DEPENDENCIES_LIBRARIES rtmidi)
+    message(STATUS "Using vendored RtMidi")
+  endif()
 endif()
 
 if (SYSTEM_ZLIB)
@@ -210,6 +215,13 @@ else()
   message(STATUS "Building without JACK support")
 endif()
 
+if (USE_RTMIDI)
+  list(APPEND AUDIO_SOURCES src/audio/rtmidi.cpp)
+  message(STATUS "Building with RtMidi")
+else()
+  message(STATUS "Building without RtMidi")
+endif()
+
 set(ENGINE_SOURCES
 src/log.cpp
 src/fileutils.cpp
diff --git a/demos/super_fantasy_zone_mango.fur b/demos/super_fantasy_zone_mango.fur
new file mode 100644
index 000000000..6cf30812d
Binary files /dev/null and b/demos/super_fantasy_zone_mango.fur differ
diff --git a/src/audio/rtmidi.cpp b/src/audio/rtmidi.cpp
new file mode 100644
index 000000000..e8f0c60d6
--- /dev/null
+++ b/src/audio/rtmidi.cpp
@@ -0,0 +1 @@
+#include "rtmidi.h"
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 647d9444a..617feacf3 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -2732,7 +2732,7 @@ void FurnaceGUI::doPaste() {
             invalidData=true;
             break;
           }
-          if (iFine<(3+e->song.pat[cursor.xCoarse].effectRows*2)) pat->data[j][iFine+1]=val;
+          if (iFine<(3+e->song.pat[iCoarse].effectRows*2)) pat->data[j][iFine+1]=val;
         }
       }
       iFine++;