diff --git a/deps/fluidsynth/include/fluidsynth/mod.h b/deps/fluidsynth/include/fluidsynth/mod.h
index a0965d00..001b790a 100644
--- a/deps/fluidsynth/include/fluidsynth/mod.h
+++ b/deps/fluidsynth/include/fluidsynth/mod.h
@@ -57,6 +57,15 @@ enum fluid_mod_flags
     FLUID_MOD_SIN = 0x80,            /**< Custom non-standard sinus mapping function */
 };
 
+/**
+ * Transform types for the SoundFont2 modulators as defined by SoundFont 2.04 section 8.3.
+ */
+enum fluid_mod_transforms
+{
+    FLUID_MOD_TRANSFORM_LINEAR = 0, /**< Linear: directly add the computed value to summing node */
+    FLUID_MOD_TRANSFORM_ABS = 2     /**< Abs: add the absolute value of the computed to summing node */
+};
+
 /**
  * General controller (if #FLUID_MOD_GC in flags).  This
  * corresponds to SoundFont 2.04 PDF section 8.2.1
@@ -83,6 +92,7 @@ FLUIDSYNTH_API void fluid_mod_set_source1(fluid_mod_t *mod, int src, int flags);
 FLUIDSYNTH_API void fluid_mod_set_source2(fluid_mod_t *mod, int src, int flags);
 FLUIDSYNTH_API void fluid_mod_set_dest(fluid_mod_t *mod, int dst);
 FLUIDSYNTH_API void fluid_mod_set_amount(fluid_mod_t *mod, double amount);
+FLUIDSYNTH_API void fluid_mod_set_transform(fluid_mod_t *mod, int type);
 
 FLUIDSYNTH_API int fluid_mod_get_source1(const fluid_mod_t *mod);
 FLUIDSYNTH_API int fluid_mod_get_flags1(const fluid_mod_t *mod);
@@ -90,6 +100,7 @@ FLUIDSYNTH_API int fluid_mod_get_source2(const fluid_mod_t *mod);
 FLUIDSYNTH_API int fluid_mod_get_flags2(const fluid_mod_t *mod);
 FLUIDSYNTH_API int fluid_mod_get_dest(const fluid_mod_t *mod);
 FLUIDSYNTH_API double fluid_mod_get_amount(const fluid_mod_t *mod);
+FLUIDSYNTH_API int fluid_mod_get_transform(fluid_mod_t *mod);
 
 FLUIDSYNTH_API int fluid_mod_test_identity(const fluid_mod_t *mod1, const fluid_mod_t *mod2);
 FLUIDSYNTH_API int fluid_mod_has_source(const fluid_mod_t *mod, int cc, int ctrl);
diff --git a/deps/fluidsynth/include/fluidsynth/version.h b/deps/fluidsynth/include/fluidsynth/version.h
index 0ce18aee..81926484 100644
--- a/deps/fluidsynth/include/fluidsynth/version.h
+++ b/deps/fluidsynth/include/fluidsynth/version.h
@@ -31,10 +31,10 @@ extern "C" {
  *
  * @{
  */
-#define FLUIDSYNTH_VERSION       "2.3.7"           /**< String constant of libfluidsynth version. */
+#define FLUIDSYNTH_VERSION       "2.4.0"           /**< String constant of libfluidsynth version. */
 #define FLUIDSYNTH_VERSION_MAJOR 2     /**< libfluidsynth major version integer constant. */
-#define FLUIDSYNTH_VERSION_MINOR 3     /**< libfluidsynth minor version integer constant. */
-#define FLUIDSYNTH_VERSION_MICRO 7     /**< libfluidsynth micro version integer constant. */
+#define FLUIDSYNTH_VERSION_MINOR 4     /**< libfluidsynth minor version integer constant. */
+#define FLUIDSYNTH_VERSION_MICRO 0     /**< libfluidsynth micro version integer constant. */
 
 FLUIDSYNTH_API void fluid_version(int *major, int *minor, int *micro);
 FLUIDSYNTH_API char* fluid_version_str(void);
diff --git a/deps/fluidsynth/lib/cmake/fluidsynth/FindLASH.cmake b/deps/fluidsynth/lib/cmake/fluidsynth/FindLASH.cmake
deleted file mode 100644
index 7cbcbaa3..00000000
--- a/deps/fluidsynth/lib/cmake/fluidsynth/FindLASH.cmake
+++ /dev/null
@@ -1,84 +0,0 @@
-#[=======================================================================[.rst:
-FindLASH
--------
-
-Finds the LASH library.
-
-Imported Targets
-^^^^^^^^^^^^^^^^
-
-This module provides the following imported targets, if found:
-
-``LASH::LASH``
-  The LASH library
-
-Result Variables
-^^^^^^^^^^^^^^^^
-
-This will define the following variables:
-
-``LASH_FOUND``
-  True if the system has the LASH library.
-``LASH_VERSION``
-  The version of the LASH library which was found.
-
-#]=======================================================================]
-
-# Use pkg-config if available
-find_package(PkgConfig QUIET)
-pkg_check_modules(PC_LASH QUIET lash-1.0)
-
-# Find the headers and library
-find_path(
-  LASH_INCLUDE_DIR
-  NAMES "lash/lash.h"
-  HINTS "${PC_LASH_INCLUDEDIR}"
-  PATH_SUFFIXES "lash-1.0")
-
-find_library(
-  LASH_LIBRARY
-  NAMES "lash"
-  HINTS "${PC_LASH_LIBDIR}")
-
-# Get version from pkg-config or read the config header
-if(PC_LASH_VERSION)
-  set(LASH_VERSION "${PC_LASH_VERSION}")
-else()
-  if(NOT LASH_FIND_VERSION)
-    set(_assumed_version "0.5.0")
-  else()
-    set(_assumed_version "${LASH_FIND_VERSION}")
-  endif()
-  message(
-    NOTICE
-    "LASH does not expose its version outside of pkg-config. Assuming version ${_assumed_version}, expect failure if your version is lower."
-  )
-  set(LASH_VERSION ${_assumed_version})
-endif()
-
-# Handle transitive dependencies
-if(PC_LASH_FOUND)
-  get_target_properties_from_pkg_config("${LASH_LIBRARY}" "PC_LASH" "_lash")
-else()
-  set(_lash_link_libraries "Jack::Jack" "Threads::Threads" "ALSA::ALSA" "uuid")
-endif()
-
-# Forward the result to CMake
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(
-  LASH
-  REQUIRED_VARS "LASH_LIBRARY" "LASH_INCLUDE_DIR"
-  VERSION_VAR "LASH_VERSION")
-
-if(LASH_FOUND AND NOT TARGET LASH::LASH)
-  add_library(LASH::LASH UNKNOWN IMPORTED)
-  set_target_properties(
-    LASH::LASH
-    PROPERTIES IMPORTED_LOCATION "${LASH_LIBRARY}"
-               INTERFACE_COMPILE_OPTIONS "${_lash_compile_options}"
-               INTERFACE_INCLUDE_DIRECTORIES "${LASH_INCLUDE_DIR}"
-               INTERFACE_LINK_LIBRARIES "${_lash_link_libraries}"
-               INTERFACE_LINK_DIRECTORIES "${_lash_link_directories}")
-endif()
-
-mark_as_advanced(LASH_INCLUDE_DIR LASH_LIBRARY)
diff --git a/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfig.cmake b/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfig.cmake
index ecbdbd09..8de41213 100644
--- a/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfig.cmake
+++ b/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfig.cmake
@@ -1,10 +1,11 @@
 # Audio / MIDI driver support
-set(FLUIDSYNTH_SUPPORT_ALSA )
+set(FLUIDSYNTH_SUPPORT_ALSA FALSE)
 set(FLUIDSYNTH_SUPPORT_COREAUDIO 1)
 set(FLUIDSYNTH_SUPPORT_COREMIDI 1)
 set(FLUIDSYNTH_SUPPORT_DART )
 set(FLUIDSYNTH_SUPPORT_DSOUND )
 set(FLUIDSYNTH_SUPPORT_JACK FALSE)
+set(FLUIDSYNTH_SUPPORT_KAI )
 set(FLUIDSYNTH_SUPPORT_MIDISHARE FALSE)
 set(FLUIDSYNTH_SUPPORT_OBOE )
 set(FLUIDSYNTH_SUPPORT_OPENSLES )
@@ -28,7 +29,6 @@ set(FLUIDSYNTH_SUPPORT_DBUS 0)
 set(FLUIDSYNTH_SUPPORT_GETOPT 1)
 set(FLUIDSYNTH_SUPPORT_IPV6 1)
 set(FLUIDSYNTH_SUPPORT_LADSPA )
-set(FLUIDSYNTH_SUPPORT_LASH )
 set(FLUIDSYNTH_SUPPORT_NETWORK 1)
 set(FLUIDSYNTH_SUPPORT_READLINE )
 set(FLUIDSYNTH_SUPPORT_SYSTEMD )
@@ -92,10 +92,6 @@ if(NOT FLUIDSYNTH_IS_SHARED)
     message(WARN "LADSPA support was built in but gmodule could not be found.")
   endif()
 
-  if(FLUIDSYNTH_SUPPORT_LASH AND NOT TARGET LASH::LASH)
-    find_dependency(LASH 0.3)
-  endif()
-
   if(FLUIDSYNTH_SUPPORT_LIBINSTPATCH AND NOT TARGET InstPatch::libinstpatch)
     find_dependency(InstPatch 1.1.0)
   endif()
diff --git a/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfigVersion.cmake b/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfigVersion.cmake
index 572bde2c..cfe0d4ae 100644
--- a/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfigVersion.cmake
+++ b/deps/fluidsynth/lib/cmake/fluidsynth/FluidSynthConfigVersion.cmake
@@ -10,13 +10,13 @@
 # The variable CVF_VERSION must be set before calling configure_file().
 
 
-set(PACKAGE_VERSION "2.3.7")
+set(PACKAGE_VERSION "2.4.0")
 
 if(PACKAGE_VERSION VERSION_LESS PACKAGE_FIND_VERSION)
   set(PACKAGE_VERSION_COMPATIBLE FALSE)
 else()
 
-  if("2.3.7" MATCHES "^([0-9]+)\\.([0-9]+)")
+  if("2.4.0" MATCHES "^([0-9]+)\\.([0-9]+)")
     set(CVF_VERSION_MAJOR "${CMAKE_MATCH_1}")
     set(CVF_VERSION_MINOR "${CMAKE_MATCH_2}")
 
@@ -27,7 +27,7 @@ else()
       string(REGEX REPLACE "^0+" "" CVF_VERSION_MINOR "${CVF_VERSION_MINOR}")
     endif()
   else()
-    set(CVF_VERSION_MAJOR "2.3.7")
+    set(CVF_VERSION_MAJOR "2.4.0")
     set(CVF_VERSION_MINOR "")
   endif()
 
diff --git a/deps/fluidsynth/lib/libfluidsynth.a b/deps/fluidsynth/lib/libfluidsynth.a
index ebe780d3..d1104f11 100644
Binary files a/deps/fluidsynth/lib/libfluidsynth.a and b/deps/fluidsynth/lib/libfluidsynth.a differ
diff --git a/deps/fluidsynth/lib/pkgconfig/fluidsynth.pc b/deps/fluidsynth/lib/pkgconfig/fluidsynth.pc
index f3a38142..d476a63d 100644
--- a/deps/fluidsynth/lib/pkgconfig/fluidsynth.pc
+++ b/deps/fluidsynth/lib/pkgconfig/fluidsynth.pc
@@ -5,7 +5,7 @@ includedir=${prefix}/include
 
 Name: FluidSynth
 Description: Software SoundFont synth
-Version: 2.3.7
+Version: 2.4.0
 Requires.private: glib-2.0 gthread-2.0 sndfile libinstpatch-1.0
 Libs: -L${libdir} -lfluidsynth
 Libs.private: -lm -Wl,-framework,CoreAudio,-framework,AudioUnit -Wl,-framework,CoreMIDI,-framework,CoreServices