diff --git a/config/SOUE01/symbols.txt b/config/SOUE01/symbols.txt
index 04be5689..767134d4 100644
--- a/config/SOUE01/symbols.txt
+++ b/config/SOUE01/symbols.txt
@@ -1035,7 +1035,7 @@ createSoundSource__9dAcBase_cFv = .text:0x8002C690; // type:function size:0x78
 initAllocatorWork1Heap__9dAcBase_cFiPci = .text:0x8002C710; // type:function size:0xC
 initAllocator__9dAcBase_cFiPcPQ23EGG4Heapi = .text:0x8002C720; // type:function size:0x8C
 addActorToRoom__9dAcBase_cFl = .text:0x8002C7B0; // type:function size:0x88
-setBit_field_0xE8__9dAcBase_cFl = .text:0x8002C840; // type:function size:0x18
+setTgSndAreaFlag__9dAcBase_cFl = .text:0x8002C840; // type:function size:0x18
 actorCreate__9dAcBase_cFv = .text:0x8002C860; // type:function size:0x8
 actorPostCreate__9dAcBase_cFv = .text:0x8002C870; // type:function size:0x8
 create__9dAcBase_cFv = .text:0x8002C880; // type:function size:0x70
@@ -20058,7 +20058,7 @@ isVolcanicDungeon__14dSndStateMgr_cFUl = .text:0x80361FD0; // type:function size
 isSeekerStoneStage__14dSndStateMgr_cFPCcl = .text:0x80362020; // type:function size:0x84
 isActiveDemoMaybe__14dSndStateMgr_cCFl = .text:0x803620B0; // type:function size:0x5C
 isSomeSkyloftRoom__14dSndStateMgr_cCFv = .text:0x80362110; // type:function size:0x34
-fn_80362150 = .text:0x80362150; // type:function size:0xB0
+onGotoStage__14dSndStateMgr_cFl = .text:0x80362150; // type:function size:0xB0
 fn_80362200 = .text:0x80362200; // type:function size:0xFC
 fn_80362300 = .text:0x80362300; // type:function size:0x84
 fn_80362390 = .text:0x80362390; // type:function size:0x6C
@@ -20067,8 +20067,8 @@ fn_80362410 = .text:0x80362410; // type:function size:0xC
 checkFlag0x18__14dSndStateMgr_cFUl = .text:0x80362420; // type:function size:0x18
 isInStage__14dSndStateMgr_cFPCc = .text:0x80362440; // type:function size:0x34
 fn_80362480 = .text:0x80362480; // type:function size:0x6C
-fn_803624F0 = .text:0x803624F0; // type:function size:0xF4
-fn_803625F0 = .text:0x803625F0; // type:function size:0x140
+onStageLoad__14dSndStateMgr_cFv = .text:0x803624F0; // type:function size:0xF4
+onRestartScene__14dSndStateMgr_cFl = .text:0x803625F0; // type:function size:0x140
 loadStageSound__14dSndStateMgr_cFv = .text:0x80362730; // type:function size:0x8
 loadStageSound__14dSndStateMgr_cFb = .text:0x80362740; // type:function size:0x59C
 calc__14dSndStateMgr_cFv = .text:0x80362CE0; // type:function size:0xFC
@@ -20137,9 +20137,9 @@ setBgmLpf__14dSndStateMgr_cFv = .text:0x80365970; // type:function size:0x8
 setBgmLpf__14dSndStateMgr_cFl = .text:0x80365980; // type:function size:0x54
 resetBgmAndStageEffectLpf__14dSndStateMgr_cFv = .text:0x803659E0; // type:function size:0x4C
 resetBgmLpf__14dSndStateMgr_cFv = .text:0x80365A30; // type:function size:0x48
-fn_80365A80 = .text:0x80365A80; // type:function size:0x4C
+calcFxSend3D__14dSndStateMgr_cFv = .text:0x80365A80; // type:function size:0x4C
 restoreEffects__14dSndStateMgr_cFv = .text:0x80365AD0; // type:function size:0xA8
-fn_80365B80 = .text:0x80365B80; // type:function size:0x5C
+setFxSend3DTarget__14dSndStateMgr_cFv = .text:0x80365B80; // type:function size:0x5C
 getUserParamVolume__14dSndStateMgr_cFUl = .text:0x80365BE0; // type:function size:0x70
 fn_80365C50 = .text:0x80365C50; // type:function size:0xC8
 loadObjectSound__14dSndStateMgr_cFv = .text:0x80365D20; // type:function size:0x3C
@@ -20178,7 +20178,7 @@ fn_80366DE0 = .text:0x80366DE0; // type:function size:0x118
 fn_80366F00 = .text:0x80366F00; // type:function size:0x5C
 fn_80366F60 = .text:0x80366F60; // type:function size:0x30C
 fn_80367270 = .text:0x80367270; // type:function size:0xC
-fn_80367280 = .text:0x80367280; // type:function size:0x18C
+setCallbacksForStage__14dSndStateMgr_cFv = .text:0x80367280; // type:function size:0x18C
 cbUnkNoop__14dSndStateMgr_cFv = .text:0x80367410; // type:function size:0x4
 fn_80367420 = .text:0x80367420; // type:function size:0x24
 fn_80367450 = .text:0x80367450; // type:function size:0x14
@@ -20463,9 +20463,9 @@ musicForStageRelated = .text:0x8036F3B0; // type:function size:0x9EC
 fn_8036FDA0 = .text:0x8036FDA0; // type:function size:0x2C
 fn_8036FDD0 = .text:0x8036FDD0; // type:function size:0x298
 fn_80370070 = .text:0x80370070; // type:function size:0xC8
-fn_80370140 = .text:0x80370140; // type:function size:0x8
+setOverrideBgmId__12dSndBgmMgr_cFUl = .text:0x80370140; // type:function size:0x8
 fn_80370150 = .text:0x80370150; // type:function size:0x20
-fn_80370170 = .text:0x80370170; // type:function size:0x1C
+activateOverrideBgmId__12dSndBgmMgr_cFv = .text:0x80370170; // type:function size:0x1C
 fn_80370190 = .text:0x80370190; // type:function size:0x180
 fn_80370310 = .text:0x80370310; // type:function size:0x8
 fn_80370320 = .text:0x80370320; // type:function size:0xF4
@@ -20502,8 +20502,8 @@ setBgmToPlayOnEventEnd__12dSndBgmMgr_cFUl = .text:0x803713D0; // type:function s
 onEventEnd__12dSndBgmMgr_cFv = .text:0x80371420; // type:function size:0x58
 fn_80371480 = .text:0x80371480; // type:function size:0x7C
 fn_80371500 = .text:0x80371500; // type:function size:0x60
-fn_80371560 = .text:0x80371560; // type:function size:0x84
-fn_803715F0 = .text:0x803715F0; // type:function size:0x84
+onTgSndAreaFlagsChange__12dSndBgmMgr_cFUlUl = .text:0x80371560; // type:function size:0x84
+onTgSndAreaMgFlagsChange__12dSndBgmMgr_cFUlUl = .text:0x803715F0; // type:function size:0x84
 fn_80371680 = .text:0x80371680; // type:function size:0xB0
 fn_80371730 = .text:0x80371730; // type:function size:0x84
 fn_803717C0 = .text:0x803717C0; // type:function size:0x160
@@ -20889,7 +20889,7 @@ __dt__20dSndHarpSongEntry2_cFv = .text:0x8037FBD0; // type:function size:0x58
 setup__17dSndHarpSongMgr_cFv = .text:0x8037FC30; // type:function size:0x4
 setupState0__17dSndHarpSongMgr_cFv = .text:0x8037FC40; // type:function size:0xA8
 fn_8037FCF0 = .text:0x8037FCF0; // type:function size:0x6C
-putHarpAway = .text:0x8037FD60; // type:function size:0x74
+deactivate__17dSndHarpSongMgr_cFv = .text:0x8037FD60; // type:function size:0x74
 fn_8037FDE0 = .text:0x8037FDE0; // type:function size:0x58
 calc__17dSndHarpSongMgr_cFv = .text:0x8037FE40; // type:function size:0x220
 fn_80380060 = .text:0x80380060; // type:function size:0x130
diff --git a/include/d/a/d_a_base.h b/include/d/a/d_a_base.h
index 1905389a..17175279 100644
--- a/include/d/a/d_a_base.h
+++ b/include/d/a/d_a_base.h
@@ -78,7 +78,7 @@ public:
     /* 0xCC */ mVec3_c mScale;
     /* 0xD8 */ u32 actor_properties;
     /* 0xDC */ dAcRef_c<dAcBase_c> actor_node;
-    /* 0xE8 */ u32 field_0xe8;
+    /* 0xE8 */ u32 mTgSndAreaFlags;
     /* 0xEC */ s8 roomid;
     /* 0xED */ u8 actor_subtype;
     /* 0xEE */ u8 polyAttr0;
@@ -177,7 +177,7 @@ public:
     /* 8002c710 */ int initAllocatorWork1Heap(int size, char *name, int align);
     /* 8002c720 */ int initAllocator(int size, char *name, EGG::Heap *heap, int align);
     /* 8002c7b0 */ bool addActorToRoom(s32 roomId);
-    /* 8002c840 */ void setBit_field_0xE8(s32);
+    /* 8002c840 */ void setTgSndAreaFlag(s32);
     /* 8002cf10 */ u32 itemDroppingAndGivingRelated(mVec3_c *spawnPos, int subtype);
     /* 8002cf90 */ void fillUpperParams2Byte();
     /* 8002cfa0 */ u32 getParams2_ignoreLower();
diff --git a/include/d/a/d_a_player.h b/include/d/a/d_a_player.h
index 2672af43..786eabd6 100644
--- a/include/d/a/d_a_player.h
+++ b/include/d/a/d_a_player.h
@@ -93,6 +93,10 @@ public:
         return LINK;
     }
 
+    static dAcPy_c *GetLinkM() {
+        return LINK;
+    }
+
     static dAcPy_c *GetLink2() {
         return LINK2;
     }
diff --git a/include/d/snd/d_snd_3d_actor.h b/include/d/snd/d_snd_3d_actor.h
index 2228f7d5..bdbfd365 100644
--- a/include/d/snd/d_snd_3d_actor.h
+++ b/include/d/snd/d_snd_3d_actor.h
@@ -128,7 +128,7 @@ protected:
     /* 0xCC */ u16 mFlags;
     /* 0xD0 */ nw4r::math::VEC3 mPositionRelativeToPlayer;
     /* 0xDC */ f32 mDistanceToPlayer;
-    /* 0xE0 */ f32 a_field_0xE0;
+    /* 0xE0 */ f32 mFxSend3D;
 };
 
 #endif
diff --git a/include/d/snd/d_snd_bgm_mgr.h b/include/d/snd/d_snd_bgm_mgr.h
index 688e7065..cce578fc 100644
--- a/include/d/snd/d_snd_bgm_mgr.h
+++ b/include/d/snd/d_snd_bgm_mgr.h
@@ -46,6 +46,12 @@ public:
     bool onEventFinalize(const char *eventName, u32 soundEventId, bool skipped);
     void prepareBgm();
 
+    void setOverrideBgmId(u32 id);
+    void activateOverrideBgmId();
+
+    void onTgSndAreaMgFlagsChange(u32 newFlags, u32 oldFlags);
+    void onTgSndAreaFlagsChange(u32 newFlags, u32 oldFlags);
+
     dSndBgmSound_c *getSoundHandleForBgm(u32 soundId, u32 startOffset);
     bool isPlayingBgmSound() const;
     bool isPlayingBgmSoundId(u32 soundId) const;
diff --git a/include/d/snd/d_snd_harp_song_mgr.h b/include/d/snd/d_snd_harp_song_mgr.h
index 67868858..934ffe0f 100644
--- a/include/d/snd/d_snd_harp_song_mgr.h
+++ b/include/d/snd/d_snd_harp_song_mgr.h
@@ -19,6 +19,9 @@ public:
 
     void calc();
 
+    void activate();
+    void deactivate();
+
     nw4r::snd::SoundHandle &getFiSingHandle() {
         return mFiSingHandle;
     }
diff --git a/include/d/snd/d_snd_state_mgr.h b/include/d/snd/d_snd_state_mgr.h
index cdb32434..cc8109d2 100644
--- a/include/d/snd/d_snd_state_mgr.h
+++ b/include/d/snd/d_snd_state_mgr.h
@@ -17,6 +17,7 @@ public:
 
 public:
     typedef void (*OnEventStartCallback)(s32 soundEventId, u32 flags);
+    typedef void (*OnFlagsChangeCallback)(u32 newFlags, u32 oldFlags);
 
     enum StageFlags_e {
         STAGE_FIELD = 0x1,
@@ -77,12 +78,10 @@ public:
         return mFrameCounter;
     }
 
-    f32 getField_0x49C() const {
-        return field_0x49C;
+    f32 getFxSend3D() const {
+        return mFxSend3D;
     }
 
-    
-    
     void resetEventName() {
         mEventName = "EVENT_NONE";
     }
@@ -173,6 +172,8 @@ public:
 
     void onStageOrLayerUpdate();
     void onStageLoad();
+    void onRestartScene(s32 fadeFrames);
+    void onGotoStage(s32 fadeFrames);
     void loadStageSound();
     void loadObjectSound();
 
@@ -227,6 +228,8 @@ private:
     void setRoomId(s32 roomId);
     void calcTgSnd();
     void calcFilters();
+    void calcFxSend3D();
+    void setFxSend3DTarget();
 
     u32 getBgmLabelSoundId();
     void doLabelSuffix(const char *suffix);
@@ -250,7 +253,7 @@ private:
     u32 getCmdCameraId();
     u32 getCmdMsgWaitId();
     u32 getCmdFrameCountId();
-    
+
     void calcSe();
     bool calcBgm();
     void calcCmd();
@@ -306,16 +309,16 @@ private:
     /* 0x060 */ UNKWORD field_0x060;
     /* 0x064 */ u8 field_0x064;
     /* 0x065 */ bool field_0x065;
-    /* 0x066 */ u8 field_0x066;
-    /* 0x067 */ u8 field_0x067;
-    /* 0x068 */ UNKWORD field_0x068;
-    /* 0x06C */ UNKWORD field_0x06C;
+    /* 0x066 */ bool mHasChangedTgSndAreaFlags;
+    /* 0x067 */ bool mHasChangedTgSndAreaMgFlags;
+    /* 0x068 */ u32 mSavedTgSndAreaFlags;
+    /* 0x06C */ u32 mSavedTgSndAreaMgFlags;
     /* 0x070 */ void (*mpUnkCallback)();
     /* 0x074 */ UNKWORD field_0x074;
     /* 0x078 */ OnEventStartCallback mpOnEventStartCallback;
     /* 0x07C */ UNKWORD field_0x07C;
-    /* 0x080 */ UNKWORD field_0x080;
-    /* 0x084 */ UNKWORD field_0x084;
+    /* 0x080 */ OnFlagsChangeCallback mpTgSndAreaFlagsChangeCallback;
+    /* 0x084 */ OnFlagsChangeCallback mpTgSndAreaMgFlagsChangeCallback;
     /* 0x088 */ UNKWORD field_0x088;
     /* 0x08C */ s32 mSoundEventId;
     /* 0x090 */ s32 mCameraCutCounter;
@@ -346,11 +349,11 @@ private:
     /* 0x258 */ u32 field_0x258;
     /* 0x25C */ nw4r::snd::FxReverbStdDpl2 mFx;
     /* 0x48C */ UNKWORD field_0x48C;
-    /* 0x490 */ f32 field_0x490;
-    /* 0x494 */ f32 field_0x494;
-    /* 0x498 */ f32 field_0x498;
-    /* 0x49C */ f32 field_0x49C;
-    /* 0x4A0 */ f32 field_0x4A0;
+    /* 0x490 */ f32 mFxSend3DDefault;
+    /* 0x494 */ f32 mFxSend3DOverride;
+    /* 0x498 */ f32 mFxSend3DNext;
+    /* 0x49C */ f32 mFxSend3D;
+    /* 0x4A0 */ f32 mFxSend3DTarget;
     /* 0x4A4 */ u32 field_0x4A4;
     /* 0x4A8 */ u8 field_0x4A8;
     /* 0x4A9 */ bool mNeedsGroupsReload;
diff --git a/include/d/t/d_t_sound_area_mgr.h b/include/d/t/d_t_sound_area_mgr.h
index d7b64106..ae191056 100644
--- a/include/d/t/d_t_sound_area_mgr.h
+++ b/include/d/t/d_t_sound_area_mgr.h
@@ -16,8 +16,12 @@ public:
     virtual int doDelete() override;
     virtual int create() override;
 
-    void setBgmFlag(int flag) {
-        mBgmFlags |= 1 << flag;
+    void setSndFlag(int flag) {
+        mSndFlags |= 1 << flag;
+    }
+
+    u32 getSndFlags() const {
+        return mSndFlags;
     }
 
     static dTgSndMg_c *GetInstance() {
@@ -26,7 +30,8 @@ public:
 
 private:
     static dTgSndMg_c *sInstance;
-    u32 mBgmFlags;
+    
+    /* 0xFC */ u32 mSndFlags;
 };
 
 #endif
diff --git a/include/toBeSorted/music_mgrs.h b/include/toBeSorted/music_mgrs.h
index 34c40a68..c0d9be19 100644
--- a/include/toBeSorted/music_mgrs.h
+++ b/include/toBeSorted/music_mgrs.h
@@ -3,9 +3,6 @@
 
 #include "common.h"
 #include "d/snd/d_snd_player_mgr.h"
-#include "d/snd/d_snd_state_mgr.h"
-
-class dSndSound_c;
 
 // A lot of these names are and were guesses that are probably wrong in a lot of ways.
 
@@ -16,8 +13,4 @@ extern "C" void fn_8035E820(dSndPlayerMgr_c *);
 extern "C" void fn_8035E880(dSndPlayerMgr_c *);
 extern "C" void fn_8035E310(dSndPlayerMgr_c *);
 
-#define ENEMY_SOUND_MGR (dSndStateMgr_c::GetInstance())
-extern "C" void fn_80362150(dSndStateMgr_c *, u16);
-extern "C" void fn_803625F0(dSndStateMgr_c *, u16);
-
 #endif
diff --git a/src/REL/d/t/d_t_sound_area.cpp b/src/REL/d/t/d_t_sound_area.cpp
index 869a62dc..b1f7552f 100644
--- a/src/REL/d/t/d_t_sound_area.cpp
+++ b/src/REL/d/t/d_t_sound_area.cpp
@@ -36,7 +36,7 @@ int dTgSndAr_c::create() {
         }
         dAcBase_c *ac = static_cast<dAcBase_c *>(base);
         if (!ac->isActorPlayer() && checkPosInArea(ac->position)) {
-            ac->setBit_field_0xE8(params & 0xFF);
+            ac->setTgSndAreaFlag(params & 0xFF);
         }
     }
     return SUCCEEDED;
@@ -49,12 +49,12 @@ int dTgSndAr_c::doDelete() {
 int dTgSndAr_c::actorExecute() {
     dAcBase_c *link = dAcPy_c::LINK;
     if (link != nullptr && checkPosInArea(link->position)) {
-        link->setBit_field_0xE8(params & 0xFF);
+        link->setTgSndAreaFlag(params & 0xFF);
     }
     if (dSnd3DManager_c::GetInstance() != nullptr) {
         mVec3_c pos(dSnd3DManager_c::GetInstance()->getCameraTargetPos());
         if (checkPosInArea(pos) && dTgSndMg_c::GetInstance() != nullptr) {
-            dTgSndMg_c::GetInstance()->setBgmFlag(params & 0xFF);
+            dTgSndMg_c::GetInstance()->setSndFlag(params & 0xFF);
         }
     }
     return SUCCEEDED;
diff --git a/src/REL/d/t/d_t_sound_area_mgr.cpp b/src/REL/d/t/d_t_sound_area_mgr.cpp
index 0d9dd1d1..c17a843c 100644
--- a/src/REL/d/t/d_t_sound_area_mgr.cpp
+++ b/src/REL/d/t/d_t_sound_area_mgr.cpp
@@ -18,9 +18,9 @@ int dTgSndMg_c::doDelete() {
 
 int dTgSndMg_c::actorExecute() {
     if (dAcPy_c::LINK != nullptr) {
-        dAcPy_c::LINK->field_0xe8 = 0;
+        dAcPy_c::LINK->mTgSndAreaFlags = 0;
     }
-    mBgmFlags = 0;
+    mSndFlags = 0;
     return SUCCEEDED;
 }
 
diff --git a/src/d/a/d_a_base.cpp b/src/d/a/d_a_base.cpp
index 1aea297b..1aa515d4 100644
--- a/src/d/a/d_a_base.cpp
+++ b/src/d/a/d_a_base.cpp
@@ -151,8 +151,8 @@ bool dAcBase_c::addActorToRoom(s32 roomId) {
     return false;
 }
 
-void dAcBase_c::setBit_field_0xE8(s32 shift) {
-    field_0xe8 |= (1 << shift);
+void dAcBase_c::setTgSndAreaFlag(s32 shift) {
+    mTgSndAreaFlags |= (1 << shift);
 }
 
 int dAcBase_c::actorCreate() {
diff --git a/src/d/d_sc_game.cpp b/src/d/d_sc_game.cpp
index 9d85e44f..7d4f449c 100644
--- a/src/d/d_sc_game.cpp
+++ b/src/d/d_sc_game.cpp
@@ -6,6 +6,7 @@
 #include "d/d_gfx.h"
 #include "d/d_stage_mgr.h"
 #include "d/flag/storyflag_manager.h"
+#include "d/snd/d_snd_state_mgr.h"
 #include "f/f_base.h"
 #include "f/f_profile_name.h"
 #include "m/m_fader_base.h"
@@ -16,7 +17,6 @@
 #include "toBeSorted/arc_managers/oarc_manager.h"
 #include "toBeSorted/file_manager.h"
 #include "toBeSorted/minigame_mgr.h"
-#include "toBeSorted/music_mgrs.h"
 #include "toBeSorted/unk_save_time.h"
 
 #include <cstring>
@@ -166,7 +166,7 @@ void dScGame_c::executeState_Action() {
         }
     } else if (mReloadTrigger != fProfile::PROFILE_MAX) {
         mFader.fadeOut();
-        fn_80362150(ENEMY_SOUND_MGR, mFader.getFadeOutFrame());
+        dSndStateMgr_c::GetInstance()->onGotoStage(mFader.getFadeOutFrame());
     }
 }
 
diff --git a/src/d/d_sc_title.cpp b/src/d/d_sc_title.cpp
index aad53c91..653e3c22 100644
--- a/src/d/d_sc_title.cpp
+++ b/src/d/d_sc_title.cpp
@@ -9,6 +9,7 @@
 #include "d/d_reset.h"
 #include "d/d_sc_game.h"
 #include "d/d_sys.h"
+#include "d/snd/d_snd_state_mgr.h"
 #include "f/f_base.h"
 #include "f/f_profile_name.h"
 #include "m/m_color.h"
@@ -162,7 +163,7 @@ void dScTitle_c::loadTitleScreen(u32 params) {
     } else {
         actuallyTriggerEntrance("F000", 0, 28, 48, 0, 0, dFader_c::FADER_BLACK, 15, -1);
     }
-    fn_80362150(ENEMY_SOUND_MGR, 30);
+    dSndStateMgr_c::GetInstance()->onGotoStage(30);
 }
 
 void dScTitle_c::setSomethingSkbRelated() {
diff --git a/src/d/d_stage_mgr.cpp b/src/d/d_stage_mgr.cpp
index e461ab37..c3f7f005 100644
--- a/src/d/d_stage_mgr.cpp
+++ b/src/d/d_stage_mgr.cpp
@@ -17,7 +17,6 @@
 #include "toBeSorted/arc_managers/layout_arc_manager.h"
 #include "toBeSorted/arc_managers/oarc_manager.h"
 #include "toBeSorted/d_particle.h"
-#include "toBeSorted/music_mgrs.h"
 
 SPECIAL_BASE_PROFILE(STAGE_MANAGER, dStageMgr_c, fProfile::STAGE_MANAGER, 0X5, 1536);
 
@@ -280,7 +279,7 @@ void dStageMgr_c::finalizeState_RestartSceneWait() {}
 void dStageMgr_c::initializeState_RestartScene() {
     triggerFade(dScGame_c::nextSpawnInfo.transitionType, dScGame_c::nextSpawnInfo.transitionFadeFrames);
     mFader.setFadeInType(dScGame_c::nextSpawnInfo.transitionType);
-    fn_803625F0(ENEMY_SOUND_MGR, mFader.getFadeOutFrame());
+    dSndStateMgr_c::GetInstance()->onRestartScene(mFader.getFadeOutFrame());
 }
 
 void dStageMgr_c::executeState_RestartScene() {
diff --git a/src/d/snd/d_snd_3d_actor.cpp b/src/d/snd/d_snd_3d_actor.cpp
index 4732c5ba..913afbd7 100644
--- a/src/d/snd/d_snd_3d_actor.cpp
+++ b/src/d/snd/d_snd_3d_actor.cpp
@@ -30,7 +30,7 @@ dSnd3DActor_c::dSnd3DActor_c(dSndSourceParam *pSourceParam, s32 sourceType)
       mpSourceParam(pSourceParam),
       mFlags(0),
       mDistanceToPlayer(INFINITY),
-      a_field_0xE0(0.0f) {
+      mFxSend3D(0.0f) {
     resetCachedRelativePositions();
     // Portability hazard
     SetUserParam(reinterpret_cast<u32>(this));
@@ -41,7 +41,7 @@ dSnd3DActor_c::dSnd3DActor_c(dSndSourceParam *pSourceParam, s32 sourceType)
 
 void dSnd3DActor_c::setPosition(const nw4r::math::VEC3 &rPosition) {
     SetPosition(rPosition);
-    a_field_0xE0 = dSndStateMgr_c::GetInstance()->getField_0x49C();
+    mFxSend3D = dSndStateMgr_c::GetInstance()->getFxSend3D();
     mFlags = 0;
 }
 
diff --git a/src/d/snd/d_snd_distant_sound_actor.cpp b/src/d/snd/d_snd_distant_sound_actor.cpp
index 88c2a9ca..0dad5ccc 100644
--- a/src/d/snd/d_snd_distant_sound_actor.cpp
+++ b/src/d/snd/d_snd_distant_sound_actor.cpp
@@ -109,7 +109,7 @@ void dSndDistantSoundActor_c::setPause(bool flag, int fadeFrames) {
 }
 
 void dSndDistantSoundActor_c::updateSome3DField() {
-    a_field_0xE0 = dSndStateMgr_c::GetInstance()->getField_0x49C();
+    mFxSend3D = dSndStateMgr_c::GetInstance()->getFxSend3D();
 }
 
 UNKWORD dSndDistantSoundActor_c::d_vt_0x3C() {
diff --git a/src/d/snd/d_snd_state_mgr.cpp b/src/d/snd/d_snd_state_mgr.cpp
index c2dceeea..6342cab2 100644
--- a/src/d/snd/d_snd_state_mgr.cpp
+++ b/src/d/snd/d_snd_state_mgr.cpp
@@ -9,6 +9,7 @@
 #include "d/snd/d_snd_checkers.h"
 #include "d/snd/d_snd_control_player_mgr.h"
 #include "d/snd/d_snd_event.h"
+#include "d/snd/d_snd_harp_song_mgr.h"
 #include "d/snd/d_snd_mgr.h"
 #include "d/snd/d_snd_player_mgr.h"
 #include "d/snd/d_snd_small_effect_mgr.h"
@@ -16,6 +17,7 @@
 #include "d/snd/d_snd_stage_data.h"
 #include "d/snd/d_snd_util.h"
 #include "d/snd/d_snd_wzsound.h"
+#include "d/t/d_t_sound_area_mgr.h"
 #include "egg/core/eggHeap.h"
 #include "nw4r/snd/snd_FxReverbStdDpl2.h"
 #include "nw4r/snd/snd_SeqSoundHandle.h"
@@ -42,16 +44,16 @@ dSndStateMgr_c::dSndStateMgr_c()
       field_0x060(0),
       field_0x064(0),
       field_0x065(false),
-      field_0x066(0),
-      field_0x067(0),
-      field_0x068(-1),
-      field_0x06C(-1),
+      mHasChangedTgSndAreaFlags(false),
+      mHasChangedTgSndAreaMgFlags(false),
+      mSavedTgSndAreaFlags(-1),
+      mSavedTgSndAreaMgFlags(-1),
       mpUnkCallback(nullptr),
       field_0x074(0),
       mpOnEventStartCallback(nullptr),
       field_0x07C(0),
-      field_0x080(0),
-      field_0x084(0),
+      mpTgSndAreaFlagsChangeCallback(nullptr),
+      mpTgSndAreaMgFlagsChangeCallback(nullptr),
       field_0x088(0),
       mSoundEventId(SND_EVENT_0x89),
       mCameraCutCounter(0),
@@ -74,11 +76,11 @@ dSndStateMgr_c::dSndStateMgr_c()
       field_0x254(0),
       field_0x258(0),
       field_0x48C(0),
-      field_0x490(0.02f),
-      field_0x494(-1.0f),
-      field_0x498(-1.0f),
-      field_0x49C(0.02f),
-      field_0x4A0(0.02f),
+      mFxSend3DDefault(0.02f),
+      mFxSend3DOverride(-1.0f),
+      mFxSend3DNext(-1.0f),
+      mFxSend3D(0.02f),
+      mFxSend3DTarget(0.02f),
       field_0x4A4(-1),
       field_0x4A8(0),
       mNeedsGroupsReload(false) {}
@@ -228,6 +230,38 @@ bool dSndStateMgr_c::isSomeSkyloftRoom() const {
     }
 }
 
+void dSndStateMgr_c::onRestartScene(s32 fadeFrames) {
+    if (field_0x064) {
+        return;
+    }
+
+    s32 nextLayer = dScGame_c::nextSpawnInfo.layer;
+    // This combines next stage with current layer, so this effectively checks if you're leaving the Hint Movie scene
+    if (isSeekerStoneStage(mStageName, dScGame_c::currentSpawnInfo.layer)) {
+        dSndBgmMgr_c::GetInstance()->stopAllBgm(fadeFrames);
+    } else if (mLayer != nextLayer) {
+        if (isSeekerStoneStage(mStageName, nextLayer)) {
+            dSndBgmMgr_c::GetInstance()->stopAllBgm(fadeFrames);
+            dSndBgmMgr_c::GetInstance()->prepareBgm(BGM_HINT_SELECT, 0);
+            dSndBgmMgr_c::GetInstance()->setOverrideBgmId(BGM_HINT_SELECT);
+            dSndBgmMgr_c::GetInstance()->activateOverrideBgmId();
+            dSndAreaSoundEffectMgr_c::GetInstance()->stopSounds(fadeFrames);
+        } else {
+            onGotoStage(fadeFrames);
+            onFlag0x10(0x01);
+            return;
+        }
+    }
+
+    dSndSmallEffectMgr_c::GetInstance()->stopAllSoundExceptEvent(fadeFrames);
+    dSndBgmMgr_c::GetInstance()->prepareBgm();
+    dSndHarpSongMgr_c::GetInstance()->deactivate();
+    onFlag0x10(0x01);
+    dSndBgmMgr_c::GetInstance()->setField_0x306(1);
+    offFlag0x10(0x4);
+    offFlag0x10(0x10);
+}
+
 void dSndStateMgr_c::loadStageSound() {
     loadStageSound(false);
 }
@@ -405,7 +439,7 @@ void dSndStateMgr_c::loadStageSound(bool force) {
     f32 volume = -1.0f;
     dSndAreaSoundEffectMgr_c::GetInstance()->loadStageSound(&volume);
     if (volume > 0.0f) {
-        field_0x490 = volume;
+        mFxSend3DDefault = volume;
     }
 }
 
@@ -700,7 +734,7 @@ void dSndStateMgr_c::handleSeLv() {
         if (dSndMgr_c::GetInstance()->holdSound(&mSeLvSoundHandle, soundId)) {
             u32 id = dSndPlayerMgr_c::GetInstance()->getDemoArchive()->GetSoundUserParam(soundId);
             if ((dSndPlayerMgr_c::sEventMuteFlagsMask & id & 0x2000000) == 0) {
-                mSeLvSoundHandle.SetFxSend(nw4r::snd::AUX_A, field_0x49C);
+                mSeLvSoundHandle.SetFxSend(nw4r::snd::AUX_A, mFxSend3D);
             }
         }
     } else {
@@ -849,7 +883,35 @@ void dSndStateMgr_c::setRoomId(s32 roomId) {
 }
 
 void dSndStateMgr_c::calcTgSnd() {
-    // ...
+    mHasChangedTgSndAreaFlags = false;
+    mHasChangedTgSndAreaMgFlags = false;
+    dAcPy_c *link = dAcPy_c::GetLinkM();
+    if (link != nullptr && dTgSndMg_c::GetInstance() != nullptr) {
+        u32 flags = dTgSndMg_c::GetInstance()->getSndFlags();
+        if (flags != mSavedTgSndAreaMgFlags) {
+            mHasChangedTgSndAreaMgFlags = true;
+            if (mpTgSndAreaMgFlagsChangeCallback != nullptr) {
+                (mpTgSndAreaMgFlagsChangeCallback)(flags, mSavedTgSndAreaMgFlags);
+            }
+            dSndBgmMgr_c::GetInstance()->onTgSndAreaMgFlagsChange(flags, mSavedTgSndAreaMgFlags);
+            mSavedTgSndAreaMgFlags = flags;
+        }
+
+        if (dSndSourceMgr_c::getBoomerangSource() != nullptr) {
+            flags = mSavedTgSndAreaMgFlags;
+        } else {
+            flags = link->mTgSndAreaFlags;
+        }
+        if (flags != mSavedTgSndAreaFlags) {
+            mHasChangedTgSndAreaFlags = true;
+            if (mpTgSndAreaFlagsChangeCallback != nullptr) {
+                (mpTgSndAreaFlagsChangeCallback)(flags, mSavedTgSndAreaFlags);
+            }
+            mFxSend3DNext = getUserParamVolume(flags);
+            dSndBgmMgr_c::GetInstance()->onTgSndAreaFlagsChange(flags, mSavedTgSndAreaFlags);
+            mSavedTgSndAreaFlags = flags;
+        }
+    }
 }
 
 void dSndStateMgr_c::calcFilters() {
@@ -975,6 +1037,37 @@ void dSndStateMgr_c::resetBgmLpf() {
     }
 }
 
+void dSndStateMgr_c::calcFxSend3D() {
+    if (mFxSend3D > mFxSend3DTarget) {
+        mFxSend3D -= 0.02f;
+        if (mFxSend3D < mFxSend3DTarget) {
+            mFxSend3D = mFxSend3DTarget;
+        }
+    } else if (mFxSend3D < mFxSend3DTarget) {
+        mFxSend3D += 0.02f;
+        if (mFxSend3D > mFxSend3DTarget) {
+            mFxSend3D = mFxSend3DTarget;
+        }
+    }
+}
+
+void dSndStateMgr_c::setFxSend3DTarget() {
+    // TODO - weird control flow
+    f32 target = mFxSend3DDefault;
+    if (mFxSend3DNext > 0.0f) {
+        target = mFxSend3DNext;
+    } else if (mFxSend3DOverride > 0.0f) {
+        target = mFxSend3DOverride;
+    }
+
+    if (target < 0.02f) {
+        target = 0.02f;
+    } else if (target > 0.3f) {
+        target = 0.3f;
+    }
+    mFxSend3DTarget = target;
+}
+
 f32 dSndStateMgr_c::getUserParamVolume(u32 userParam) {
     s32 bit = 31;
     for (int i = 0; i < 4; i++) {