diff --git a/Makefile b/Makefile
index 73c96203b..cd70836a4 100755
--- a/Makefile
+++ b/Makefile
@@ -243,12 +243,12 @@ libagbsyscall:
 $(BUILD_DIR)/sym_ewram.ld: sym_ewram.txt
 	$(RAMSCRGEN) ewram_data $< ENGLISH > $@
 
-$(BUILD_DIR)/sym_ewram2.ld: sym_ewram2.txt
-	$(RAMSCRGEN) ewram_data $< ENGLISH > $@
-
 $(BUILD_DIR)/sym_iwram.ld: sym_iwram.txt
 	$(RAMSCRGEN) iwram_data $< ENGLISH > $@
 
+$(BUILD_DIR)/sym_ewram2.ld: sym_ewram2.txt
+	$(RAMSCRGEN) ewram_data_2 $< ENGLISH > $@
+
 $(LD_SCRIPT): ld_script.txt $(BUILD_DIR)/sym_ewram.ld $(BUILD_DIR)/sym_ewram2.ld $(BUILD_DIR)/sym_iwram.ld
 	cd $(BUILD_DIR) && sed -e "s#tools/#../../tools/#g" ../../ld_script.txt >ld_script.ld
 
diff --git a/include/music.h b/include/music.h
index df7230d07..dab7729d2 100644
--- a/include/music.h
+++ b/include/music.h
@@ -49,6 +49,8 @@ void nullsub_20(u16 songIndex);
 #define STOP_BGM 999
 
 #define MAX_VOLUME 256
+#define NUM_BG_PLAYERS (INDEX_FANFARE - INDEX_BGM) + 1 // 2
+#define NUM_SE_PLAYERS (INDEX_SE6 - INDEX_SE1) + 1 // 6
 
 enum MusicPlayerIndex
 {
diff --git a/ld_script.txt b/ld_script.txt
index 7a93d4038..56ef49cb8 100755
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -10,6 +10,7 @@ SECTIONS {
     ALIGN(4)
     {
         ewram_start = .;
+        data/sound_data.o(.bss);
         INCLUDE "sym_ewram.ld"
         src/agb_flash.o(.bss);
         *libgcc.a:fp-bit.o(.bss);
diff --git a/sound/music_player_table.inc b/sound/music_player_table.inc
index 3c2a3f8c3..552bcfcbc 100644
--- a/sound/music_player_table.inc
+++ b/sound/music_player_table.inc
@@ -1,10 +1,58 @@
+
+	.equiv TRACK_SIZE, 0x50
+	.equiv NUM_TRACKS_BGM, 12
+	.equiv NUM_TRACKS_FANFARE, 6
+	.equiv NUM_TRACKS_SE1, 1
+	.equiv NUM_TRACKS_SE2, 1
+	.equiv NUM_TRACKS_SE3, 2
+	.equiv NUM_TRACKS_SE4, 2
+	.equiv NUM_TRACKS_SE5, 2
+	.equiv NUM_TRACKS_SE6, 1
+
+    .bss
+
+gMPlayTrack_BGM::
+    .space TRACK_SIZE * NUM_TRACKS_BGM
+    .size gMPlayTrack_BGM, .-gMPlayTrack_BGM
+
+gMPlayTrack_Fanfare::
+    .space TRACK_SIZE * NUM_TRACKS_FANFARE
+    .size gMPlayTrack_Fanfare, .-gMPlayTrack_Fanfare
+
+gMPlayTrack_SE1::
+    .space TRACK_SIZE * NUM_TRACKS_SE1
+    .size gMPlayTrack_SE1, .-gMPlayTrack_SE1
+
+gMPlayTrack_SE2::
+    .space TRACK_SIZE * NUM_TRACKS_SE2
+    .size gMPlayTrack_SE2, .-gMPlayTrack_SE2
+
+gMPlayTrack_SE3::
+    .space TRACK_SIZE * NUM_TRACKS_SE3
+    .size gMPlayTrack_SE3, .-gMPlayTrack_SE3
+
+gMPlayTrack_SE4::
+    .space TRACK_SIZE * NUM_TRACKS_SE4
+    .size gMPlayTrack_SE4, .-gMPlayTrack_SE4
+
+gMPlayTrack_SE5::
+    .space TRACK_SIZE * NUM_TRACKS_SE5
+    .size gMPlayTrack_SE5, .-gMPlayTrack_SE5
+
+gMPlayTrack_SE6::
+    .space TRACK_SIZE * NUM_TRACKS_SE6
+    .size gMPlayTrack_SE6, .-gMPlayTrack_SE6
+
+    .section .rodata
+
 	.align 2
 gMPlayTable:: @ 9E8665C
-	music_player gMPlayInfo_BGM, gMPlayTrack_BGM, 12, 0
-	music_player gMPlayInfo_Fanfare, gMPlayTrack_Fanfare, 6, 0
-	music_player gMPlayInfo_SE1, gMPlayTrack_SE1, 1, 0
-	music_player gMPlayInfo_SE2, gMPlayTrack_SE2, 1, 0
-	music_player gMPlayInfo_SE3, gMPlayTrack_SE3, 2, 0
-	music_player gMPlayInfo_SE4, gMPlayTrack_SE4, 2, 0
-	music_player gMPlayInfo_SE5, gMPlayTrack_SE5, 2, 0
-	music_player gMPlayInfo_SE6, gMPlayTrack_SE6, 1, 0
+	music_player gMPlayInfo_BGM, gMPlayTrack_BGM, NUM_TRACKS_BGM, 0
+	music_player gMPlayInfo_Fanfare, gMPlayTrack_Fanfare, NUM_TRACKS_FANFARE, 0
+	music_player gMPlayInfo_SE1, gMPlayTrack_SE1, NUM_TRACKS_SE1, 0
+	music_player gMPlayInfo_SE2, gMPlayTrack_SE2, NUM_TRACKS_SE2, 0
+	music_player gMPlayInfo_SE3, gMPlayTrack_SE3, NUM_TRACKS_SE3, 0
+	music_player gMPlayInfo_SE4, gMPlayTrack_SE4, NUM_TRACKS_SE4, 0
+	music_player gMPlayInfo_SE5, gMPlayTrack_SE5, NUM_TRACKS_SE5, 0
+	music_player gMPlayInfo_SE6, gMPlayTrack_SE6, NUM_TRACKS_SE6, 0
+
diff --git a/src/code_80001DC.c b/src/code_80001DC.c
index 6bcdcc9bc..da97e8e06 100644
--- a/src/code_80001DC.c
+++ b/src/code_80001DC.c
@@ -1,6 +1,7 @@
+#include "gba/defines.h"
 #include "global.h"
 
-extern u32 gUnknown_3004000;
+IWRAM_DATA u32 gUnknown_3004000 = {0};
 
 // unused, returns stack pointer
 u32 sub_80001DC() {
diff --git a/src/code_8023144.c b/src/code_8023144.c
index ef1fdff54..8ea1fa449 100644
--- a/src/code_8023144.c
+++ b/src/code_8023144.c
@@ -34,7 +34,7 @@ struct unkStruct_3001B5C
     u8 unk3F8[4];
 };
 
-extern struct unkStruct_3001B5C *gUnknown_3001B5C;
+IWRAM_DATA struct unkStruct_3001B5C *gUnknown_3001B5C;
 
 extern u32 gUnknown_203B298;
 extern u16 gUnknown_203B29C;
diff --git a/src/flash.c b/src/flash.c
index 0ef93e7c6..e7b020565 100644
--- a/src/flash.c
+++ b/src/flash.c
@@ -3,7 +3,7 @@
 #include "flash.h"
 #include "memory.h"
 
-EWRAM_DATA u8 gFlashEnabled;
+u8 gFlashEnabled;
 
 extern FlashIntrFunc *GetInterruptHandler(s32);
 
diff --git a/src/ground_map.c b/src/ground_map.c
index 0f882332a..ff5926406 100644
--- a/src/ground_map.c
+++ b/src/ground_map.c
@@ -3,12 +3,12 @@
 #include "debug.h"
 #include "ground_script.h"
 
-extern struct GroundScript_ExecutePP_1 *gUnknown_3001B6C;
+IWRAM_DATA struct GroundScript_ExecutePP_1 *gUnknown_3001B6C = {0}; // iwram
+IWRAM_DATA u8 *gUnknown_3001B70 = {0};
 
 extern struct DebugLocation gUnknown_8117538[];
 
 extern u8 gUnknown_811736C[];
-extern u8 *gUnknown_3001B70;
 
 extern void sub_809D600(void *, u8 *, u32, u32, u32);
 extern void GroundMap_Reset(void);
diff --git a/src/ground_map_2.c b/src/ground_map_2.c
index 34bd1d1ce..458b89541 100644
--- a/src/ground_map_2.c
+++ b/src/ground_map_2.c
@@ -17,12 +17,12 @@ struct unkStruct_3001B74
     u32 unk20;
 };
 
-extern struct unkStruct_3001B74 *gUnknown_3001B74;
+IWRAM_DATA struct unkStruct_3001B74 *gUnknown_3001B74 = {0}; // iwram
 
 extern u16 gUnknown_2026E4E;
 
 // size: 0x55C
-extern u8 *gUnknown_3001B78;
+IWRAM_DATA u8 *gUnknown_3001B78 = {0}; // iwram
 
 extern u8 gUnknown_8117784[];
 extern s16 gUnknown_811E5F4[][2];
diff --git a/src/m4a.c b/src/m4a.c
index 3c96c88c7..37ab0afde 100644
--- a/src/m4a.c
+++ b/src/m4a.c
@@ -1,9 +1,19 @@
+#include "gba/defines.h"
 #include "gba/m4a_internal.h"
 #include "global.h"
 
 extern const u8 gCgb3Vol[];
 
-extern char SoundMainRAM_Buffer[0x400];
+IWRAM_DATA char SoundMainRAM_Buffer[0x400] = {0};
+
+extern struct MusicPlayerInfo gMPlayInfo_SE4;
+extern struct MusicPlayerInfo gMPlayInfo_SE5;
+extern struct MusicPlayerInfo gMPlayInfo_BGM; // BGM??
+extern struct MusicPlayerInfo gMPlayInfo_SE6;
+extern struct MusicPlayerInfo gMPlayInfo_Fanfare;
+extern struct MusicPlayerInfo gMPlayInfo_SE1;
+extern struct MusicPlayerInfo gMPlayInfo_SE3;
+extern struct MusicPlayerInfo gMPlayInfo_SE2;
 
 extern struct SoundInfo gSoundInfo;
 
diff --git a/src/music.c b/src/music.c
index 394052eaa..2e5ad1907 100644
--- a/src/music.c
+++ b/src/music.c
@@ -12,8 +12,10 @@ EWRAM_DATA u16 gMusicTransitionCounter;
 EWRAM_DATA bool8 gRestartBGM;
 
 extern struct MusicPlayerInfo gMPlayInfo_BGM; // BGM??
-extern struct PMDMusicPlayer gUnknown_3000FD8[8];
-extern struct PMDMusicPlayer gUnknown_3000FE8[8];
+
+// IWRAM
+IWRAM_DATA struct PMDMusicPlayer gBGMusicPlayers[NUM_BG_PLAYERS] = {0};
+IWRAM_DATA struct PMDMusicPlayer gSEMusicPlayers[NUM_SE_PLAYERS] = {0};
 
 extern bool8 EnableInterrupts(void);
 extern bool8 DisableInterrupts(void);
@@ -40,7 +42,7 @@ void InitMusic(void)
     gMusicTransitionCounter = 0;
     gRestartBGM = FALSE;
 
-    for(playerIndex = INDEX_BGM, musicPlayer = &gUnknown_3000FD8[0]; playerIndex < INDEX_SE6 + 1; playerIndex++, musicPlayer++)
+    for(playerIndex = INDEX_BGM, musicPlayer = &gBGMusicPlayers[0]; playerIndex < INDEX_SE6 + 1; playerIndex++, musicPlayer++)
     {
         musicPlayer->unk0 = 0;
         musicPlayer->songIndex = STOP_SOUND_EFFECT;
@@ -293,7 +295,7 @@ void PlayFanfareSE(u16 songIndex, u16 volume)
     if (!IsSoundEffect(songIndex))
       return;
     playerIndex = GetMusicPlayerIndex(songIndex);
-    musicPlayer = &gUnknown_3000FD8[playerIndex]; // need to load this before comparison to match
+    musicPlayer = &gBGMusicPlayers[playerIndex]; // need to load this before comparison to match
     if (playerIndex < INDEX_SE1)
         nullsub_20(songIndex);
     else
@@ -331,7 +333,7 @@ void SetSoundEffectVolume(u16 songIndex, u16 volume)
   if ((!IsFanfare(songIndex)) && (IsSoundEffect(songIndex))) {
     playerIndex = GetMusicPlayerIndex(songIndex);
     info = gMPlayTable[playerIndex].info;
-    musicPlayer = &gUnknown_3000FD8[playerIndex];
+    musicPlayer = &gBGMusicPlayers[playerIndex];
     if (playerIndex >= INDEX_SE1) {
       interrupt_flag = DisableInterrupts();
       if (musicPlayer->songIndex == songIndex) {
@@ -360,7 +362,7 @@ void StopFanfareSE(u16 songIndex)
     if (songIndex == STOP_SOUND_EFFECT) {
         cVar1 = DisableInterrupts();
 
-        for(playerIndex2 = INDEX_SE1, musicPlayer1 = &gUnknown_3000FE8[0]; playerIndex2 < INDEX_SE6; playerIndex2++, musicPlayer1++)
+        for(playerIndex2 = INDEX_SE1, musicPlayer1 = &gSEMusicPlayers[0]; playerIndex2 < INDEX_SE6; playerIndex2++, musicPlayer1++)
         {
             m4aMPlayStop(gMPlayTable[playerIndex2].info);
             musicPlayer1->unk0 = 0;
@@ -376,7 +378,7 @@ void StopFanfareSE(u16 songIndex)
     {
         playerIndex = GetMusicPlayerIndex(songIndex);
         info = gMPlayTable[playerIndex].info;
-        musicPlayer = &gUnknown_3000FD8[playerIndex];
+        musicPlayer = &gBGMusicPlayers[playerIndex];
         if (playerIndex < INDEX_SE1) {
             nullsub_21(songIndex);
         }
@@ -450,7 +452,7 @@ void FadeOutFanfareSE(u16 songIndex, u16 speed)
 
     if (songIndex == STOP_SOUND_EFFECT) {
         cVar1 = DisableInterrupts();
-        for(playerIndex2 = INDEX_SE1, musicPlayer1 = &gUnknown_3000FE8[0]; playerIndex2 < INDEX_SE6; playerIndex2++, musicPlayer1++)
+        for(playerIndex2 = INDEX_SE1, musicPlayer1 = &gSEMusicPlayers[0]; playerIndex2 < INDEX_SE6; playerIndex2++, musicPlayer1++)
         {
             if (musicPlayer1->songIndex != STOP_SOUND_EFFECT) {
                 if (IsMusicPlayerPlaying(playerIndex2)) {
@@ -471,7 +473,7 @@ void FadeOutFanfareSE(u16 songIndex, u16 speed)
     }
     else if (IsSoundEffect(songIndex)) {
         playerIndex = GetMusicPlayerIndex(songIndex);
-        musicPlayer = &gUnknown_3000FD8[playerIndex];
+        musicPlayer = &gBGMusicPlayers[playerIndex];
         playerInfo = gMPlayTable[playerIndex].info;
         cVar2 = DisableInterrupts();
         if (musicPlayer->songIndex != STOP_SOUND_EFFECT) {
@@ -546,7 +548,7 @@ bool8 IsFanfareSEPlaying(u16 songIndex)
   {
     if (IsSoundEffect(songIndex_u32)) {
       playerIndex = GetMusicPlayerIndex(songIndex_u32);
-      musicPlayer = &gUnknown_3000FD8[playerIndex];
+      musicPlayer = &gBGMusicPlayers[playerIndex];
       if ((INDEX_SE1 <= playerIndex) && (musicPlayer->songIndex == songIndex_u32_2)) {
         return TRUE;
       }
@@ -701,7 +703,7 @@ void UpdateSound(void)
         }
     }
 
-    for(musicPlayerIndex = INDEX_SE1,  musicPlayer = &gUnknown_3000FE8[0]; musicPlayerIndex < INDEX_SE6; musicPlayerIndex++, musicPlayer++)
+    for(musicPlayerIndex = INDEX_SE1,  musicPlayer = &gSEMusicPlayers[0]; musicPlayerIndex < INDEX_SE6; musicPlayerIndex++, musicPlayer++)
     {
         if (musicPlayer->songIndex != STOP_SOUND_EFFECT) 
         {
diff --git a/sym_ewram.txt b/sym_ewram.txt
index e23ab3003..db77488b0 100644
--- a/sym_ewram.txt
+++ b/sym_ewram.txt
@@ -1,26 +1,3 @@
-gMPlayTrack_BGM: /* 2000000 */
-        .space 0x3C0
-
-gMPlayTrack_Fanfare: /* 20003C0 */
-        .space 0x1E0
-
-gMPlayTrack_SE1: /* 20005A0 */
-        .space 0x50
-
-gMPlayTrack_SE2: /* 20005F0 */
-        .space 0x50
-
-gMPlayTrack_SE3: /* 2000640 */
-        .space 0xA0
-
-gMPlayTrack_SE4: /* 20006E0 */
-        .space 0xA0
-
-gMPlayTrack_SE5: /* 2000780 */
-        .space 0xA0
-
-gMPlayTrack_SE6: /* 2000820 */
-        .space 0x50
 
 gMPlayInfo_SE4: /* 2000870 */
         .space 0x40
diff --git a/sym_iwram.txt b/sym_iwram.txt
index f67fd614a..f415157eb 100644
--- a/sym_iwram.txt
+++ b/sym_iwram.txt
@@ -1,5 +1,4 @@
-SoundMainRAM_Buffer: /* 3000000 */
-	.space 0x400
+.include "src/m4a.o"
 
 gUnknown_3000400: /* 3000400 */
 	.space 0x800
@@ -10,11 +9,7 @@ gUnknown_3000C00: /* 3000C00 */
 gUnknown_3000E94: /* 3000E94 */
 	.space 0x144
 
-gUnknown_3000FD8: /* 3000FD8 */
-	.space 0x10
-
-gUnknown_3000FE8: /* 3000FE8 */
-	.space 0x30
+.include "src/music.o"
 
 gUnknown_3001018: /* 3001018 */
 	.space 0x180
@@ -44,17 +39,8 @@ gUnknown_3001B64: /* 3001B64 */
 gUnknown_3001B68: /* 3001B68 */
 	.space 0x4
 
-gUnknown_3001B6C: /* 3001B6C */
-	.space 0x4
-
-gUnknown_3001B70: /* 3001B70 */
-	.space 0x4
-
-gUnknown_3001B74: /* 3001B74 */
-	.space 0x4
-
-gUnknown_3001B78: /* 3001B78 */
-	.space 0x4
+.include "src/ground_map.o"
+.include "src/ground_map_2.o"
 
 gUnknown_3001B7C: /* 3001B7C */
 	.space 0x4
@@ -74,4 +60,4 @@ gUnknown_3001B8C: /* 3001B8C */
 gUnknown_3001B90: /* 3001B90 */
 	.space 0x2470
 
-gUnknown_3004000: /* 3004000 */
+.include "src/code_80001DC.o"