diff --git a/include/coreinit/debug.h b/include/coreinit/debug.h
index 808d6877..dd65f097 100644
--- a/include/coreinit/debug.h
+++ b/include/coreinit/debug.h
@@ -12,6 +12,7 @@ extern "C" {
 #endif
 
 typedef void (*DisassemblyPrintFn)(const char *fmt, ...);
+
 typedef uint32_t (*DisassemblyFindSymbolFn)(uint32_t addr, char *symbolNameBuf, uint32_t symbolNameBufSize);
 
 typedef enum DisassemblePPCFlags
@@ -72,6 +73,12 @@ OSIsECOBoot();
 BOOL
 OSIsECOMode();
 
+void
+__OSSetCrashRecovery(uint32_t crashRecovery);
+
+uint32_t
+__OSGetCrashRecovery();
+
 BOOL
 DisassemblePPCOpcode(uint32_t *opcode,
                      char *buffer,
diff --git a/include/coreinit/memory.h b/include/coreinit/memory.h
index cbe0c10d..cc0e047e 100644
--- a/include/coreinit/memory.h
+++ b/include/coreinit/memory.h
@@ -33,6 +33,12 @@ OSGetSharedData(OSSharedDataType type,
                 void **outPtr,
                 uint32_t *outSize);
 
+/*
+ * Can only be called from Root (process)
+ */
+void
+__OSRootLoadShared();
+
 /**
  * Moves chunks of memory around, similarly to memmove. Overlapping source and
  * destination regions are supported.
diff --git a/include/coreinit/transition.h b/include/coreinit/transition.h
new file mode 100644
index 00000000..10ab6a2a
--- /dev/null
+++ b/include/coreinit/transition.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <wut.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int
+__OSGetSavedAudioFlags();
+
+int __OSGetTransitionAudioBuffer(void **buffer,
+                                 uint32_t *size);
+
+void
+__OSSetTransitionAudioSize(uint32_t size);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/include/sndcore2/core.h b/include/sndcore2/core.h
index 1a4d4925..91b412a8 100644
--- a/include/sndcore2/core.h
+++ b/include/sndcore2/core.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <wut.h>
+#include <sndcore2/device.h>
 #include "result.h"
 
 /**
@@ -15,6 +16,7 @@ extern "C" {
 
 typedef struct AXProfile AXProfile;
 typedef struct AXInitParams AXInitParams;
+typedef struct AXTransitionAudioBuffer AXTransitionAudioBuffer;
 
 typedef void(*AXFrameCallback)(void);
 
@@ -51,6 +53,24 @@ WUT_CHECK_OFFSET(AXInitParams, 0x00, renderer);
 WUT_CHECK_OFFSET(AXInitParams, 0x08, pipeline);
 WUT_CHECK_SIZE(AXInitParams, 0x0C);
 
+struct WUT_PACKED AXTransitionAudioBuffer {
+    WUT_UNKNOWN_BYTES(0x8);
+    uint32_t length;
+    WUT_UNKNOWN_BYTES(0x4);
+    void *audioBuffer;
+    uint32_t audioBufferLen;
+    AXDeviceMode tvMode;
+    WUT_UNKNOWN_BYTES(0xC);
+    AXDeviceMode drcMode;
+    WUT_UNKNOWN_BYTES(0xC);
+};
+WUT_CHECK_OFFSET(AXTransitionAudioBuffer, 0x08, length);
+WUT_CHECK_OFFSET(AXTransitionAudioBuffer, 0x10, audioBuffer);
+WUT_CHECK_OFFSET(AXTransitionAudioBuffer, 0x14, audioBufferLen);
+WUT_CHECK_OFFSET(AXTransitionAudioBuffer, 0x18, tvMode);
+WUT_CHECK_OFFSET(AXTransitionAudioBuffer, 0x28, drcMode);
+WUT_CHECK_SIZE(AXTransitionAudioBuffer, 0x38);
+
 void
 AXInit();
 
@@ -89,6 +109,12 @@ AXGetInputSamplesPerFrame();
 uint32_t
 AXGetInputSamplesPerSec();
 
+void
+AXStartTransitionAudio();
+
+void
+AXSetUpTransitionAudio(AXTransitionAudioBuffer *buffer);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/tests/test_compile_headers_common/test_compile_headers_list.h b/tests/test_compile_headers_common/test_compile_headers_list.h
index 443d0af7..3de16415 100644
--- a/tests/test_compile_headers_common/test_compile_headers_list.h
+++ b/tests/test_compile_headers_common/test_compile_headers_list.h
@@ -47,6 +47,7 @@
 #include <coreinit/threadqueue.h>
 #include <coreinit/time.h>
 #include <coreinit/title.h>
+#include <coreinit/transition.h>
 #include <coreinit/userconfig.h>
 #include <dmae/mem.h>
 #include <dmae/sync.h>