diff --git a/3rdparty/CMakeLists.txt b/3rdparty/CMakeLists.txt
index ef70bfe..45e0dd3 100644
--- a/3rdparty/CMakeLists.txt
+++ b/3rdparty/CMakeLists.txt
@@ -8,6 +8,8 @@ include(lzma.cmake)
 
 include(zstd.cmake)
 
+include(flac.cmake)
+
 #cmake_policy(SET CMP0077 NEW)
 #set(BUILD_CXXLIBS OFF)
 #set(BUILD_PROGRAMS OFF)
diff --git a/3rdparty/flac.cmake b/3rdparty/flac.cmake
new file mode 100644
index 0000000..d387784
--- /dev/null
+++ b/3rdparty/flac.cmake
@@ -0,0 +1,162 @@
+# 3.1 is OK for most parts. However:
+# 3.3 is needed in src/libFLAC
+# 3.5 is needed in src/libFLAC/ia32
+# 3.9 is needed in 'doc' because of doxygen_add_docs()
+cmake_minimum_required(VERSION 3.5)
+
+if(NOT (CMAKE_BUILD_TYPE OR CMAKE_CONFIGURATION_TYPES OR DEFINED ENV{CFLAGS} OR DEFINED ENV{CXXFLAGS}))
+    set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build, options are: None Debug Release RelWithDebInfo")
+endif()
+
+project(FLAC VERSION 1.3.3) # HOMEPAGE_URL "https://www.xiph.org/flac/")
+
+message(STATUS "FLAC VERSION: ${PROJECT_VERSION}")
+set(BUILD_SHARED_LIBS BOOL OFF)
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/flac/cmake")
+
+set(VERSION ${PROJECT_VERSION})
+
+set(PROJECT_SOURCE_DIR "${PROJECT_SOURCE_DIR}/flac/")
+
+find_package(Iconv)
+set(HAVE_ICONV ${Iconv_FOUND})
+
+if(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -funroll-loops")
+endif()
+
+include(CMakePackageConfigHelpers)
+include(CPack)
+include(CTest)
+include(CheckCCompilerFlag)
+include(CheckCXXCompilerFlag)
+include(CheckSymbolExists)
+include(CheckFunctionExists)
+include(CheckIncludeFile)
+include(CheckCSourceCompiles)
+include(CheckCXXSourceCompiles)
+include(UseSystemExtensions)
+include(TestBigEndian)
+
+check_include_file("byteswap.h" HAVE_BYTESWAP_H)
+check_include_file("inttypes.h" HAVE_INTTYPES_H)
+check_include_file("stdint.h" HAVE_STDINT_H)
+if(MSVC)
+    check_include_file("intrin.h" FLAC__HAS_X86INTRIN)
+else()
+    check_include_file("x86intrin.h" FLAC__HAS_X86INTRIN)
+endif()
+
+check_function_exists(fseeko HAVE_FSEEKO)
+
+check_c_source_compiles("int main() { return __builtin_bswap16 (0) ; }" HAVE_BSWAP16)
+check_c_source_compiles("int main() { return __builtin_bswap32 (0) ; }" HAVE_BSWAP32)
+
+if(NOT "${CMAKE_C_PLATFORM_ID}" MATCHES "MinGW" OR (NOT ${CMAKE_SYSTEM_PROCESSOR} MATCHES "arm" AND NOT ${CMAKE_SYSTEM_PROCESSOR} MATCHES "aarch64"))
+    test_big_endian(CPU_IS_BIG_ENDIAN)
+endif()
+
+check_c_compiler_flag(-mstackrealign HAVE_STACKREALIGN_FLAG)
+
+include_directories("flac/include")
+
+include_directories("${CMAKE_CURRENT_BINARY_DIR}/flac")
+add_definitions(-DHAVE_CONFIG_H)
+
+if(MSVC)
+    add_definitions(
+            -D_CRT_SECURE_NO_WARNINGS
+            -D_USE_MATH_DEFINES)
+endif()
+
+option(WITH_ASM "Use any assembly optimization routines" ON)
+
+check_include_file("cpuid.h" HAVE_CPUID_H)
+check_include_file("sys/param.h" HAVE_SYS_PARAM_H)
+
+set(CMAKE_REQUIRED_LIBRARIES m)
+check_function_exists(lround HAVE_LROUND)
+
+include(CheckCSourceCompiles)
+include(CheckCPUArch)
+
+check_cpu_arch_x64(FLAC__CPU_X86_64)
+if(NOT FLAC__CPU_X86_64)
+    check_cpu_arch_x86(FLAC__CPU_IA32)
+endif()
+
+if(FLAC__CPU_X86_64 OR FLAC__CPU_IA32)
+    set(FLAC__ALIGN_MALLOC_DATA 1)
+    option(WITH_AVX "Enable AVX, AVX2 optimizations" ON)
+endif()
+
+include(CheckLanguage)
+check_language(ASM_NASM)
+if(CMAKE_ASM_NASM_COMPILER)
+    enable_language(ASM_NASM)
+    add_definitions(-DFLAC__HAS_NASM)
+endif()
+
+if(NOT WITH_ASM)
+    add_definitions(-DFLAC__NO_ASM)
+endif()
+
+if(FLAC__CPU_IA32)
+    if(WITH_ASM AND CMAKE_ASM_NASM_COMPILER)
+        add_subdirectory(ia32)
+    endif()
+
+    option(WITH_SSE "Enable SSE2 optimizations" ON)
+    check_c_compiler_flag(-msse2 HAVE_MSSE2_FLAG)
+    if(WITH_SSE)
+        add_compile_options(
+                $<$<BOOL:${HAVE_MSSE2_FLAG}>:-msse2>
+                $<$<BOOL:${MSVC}>:/arch:SSE2>)
+    endif()
+endif()
+
+include_directories("flac/src/libFLAC/include")
+
+add_library(FLAC STATIC
+            flac/src/libFLAC/bitmath.c
+            flac/src/libFLAC/bitreader.c
+            flac/src/libFLAC/bitwriter.c
+            flac/src/libFLAC/cpu.c
+            flac/src/libFLAC/crc.c
+            flac/src/libFLAC/fixed.c
+            flac/src/libFLAC/fixed_intrin_sse2.c
+            flac/src/libFLAC/fixed_intrin_ssse3.c
+            flac/src/libFLAC/float.c
+            flac/src/libFLAC/format.c
+            flac/src/libFLAC/lpc.c
+            flac/src/libFLAC/lpc_intrin_sse.c
+            flac/src/libFLAC/lpc_intrin_sse2.c
+            flac/src/libFLAC/lpc_intrin_sse41.c
+            flac/src/libFLAC/lpc_intrin_avx2.c
+            flac/src/libFLAC/lpc_intrin_vsx.c
+            flac/src/libFLAC/md5.c
+            flac/src/libFLAC/memory.c
+            flac/src/libFLAC/metadata_iterators.c
+            flac/src/libFLAC/metadata_object.c
+            flac/src/libFLAC/stream_decoder.c
+            flac/src/libFLAC/stream_encoder.c
+            flac/src/libFLAC/stream_encoder_intrin_sse2.c
+            flac/src/libFLAC/stream_encoder_intrin_ssse3.c
+            flac/src/libFLAC/stream_encoder_intrin_avx2.c
+            flac/src/libFLAC/stream_encoder_framing.c
+            flac/src/libFLAC/window.c
+            $<$<BOOL:${WIN32}>:flac/include/share/windows_unicode_filenames.h>
+            $<$<BOOL:${WIN32}>:flac/src/libFLAC/windows_unicode_filenames.c>
+            $<$<BOOL:${OGG_FOUND}>:ogg_decoder_aspect.c>
+            $<$<BOOL:${OGG_FOUND}>:ogg_encoder_aspect.c>
+            $<$<BOOL:${OGG_FOUND}>:ogg_helper.c>
+            $<$<BOOL:${OGG_FOUND}>:ogg_mapping.c>)
+
+target_compile_definitions(FLAC PUBLIC FLAC__NO_DLL)
+
+# Disable fortify source when not-release or when cross-building with MingW for WoA
+if(CMAKE_BUILD_TYPE STREQUAL Debug OR CMAKE_BUILD_TYPE STREQUAL RelWithDebInfo OR "${CMAKE_C_PLATFORM_ID}" MATCHES "MinGW")
+    set(DODEFINE_FORTIFY_SOURCE 0)
+endif()
+
+configure_file(flac/config.cmake.h.in flac/config.h)
\ No newline at end of file