diff --git a/src/game/game_179060.c b/src/game/game_179060.c
index ffc9aa02c..f38abaee8 100644
--- a/src/game/game_179060.c
+++ b/src/game/game_179060.c
@@ -4824,7 +4824,7 @@ glabel var7f1b8228
 /*  f17ddb0:	8cc90004 */ 	lw	$t1,0x4($a2)
 /*  f17ddb4:	15200003 */ 	bnez	$t1,.L0f17ddc4
 /*  f17ddb8:	00000000 */ 	sll	$zero,$zero,0x0
-/*  f17ddbc:	0fc630e3 */ 	jal	func0f18c38c
+/*  f17ddbc:	0fc630e3 */ 	jal	mpSetTrackSlotEnabled
 /*  f17ddc0:	00602025 */ 	or	$a0,$v1,$zero
 .L0f17ddc4:
 /*  f17ddc4:	3c02800a */ 	lui	$v0,%hi(g_Vars)
@@ -4852,7 +4852,7 @@ glabel var7f1b8228
 /*  f17de18:	10000052 */ 	beqz	$zero,.L0f17df64
 /*  f17de1c:	00001025 */ 	or	$v0,$zero,$zero
 .L0f17de20:
-/*  f17de20:	0fc630f9 */ 	jal	func0f18c3e4
+/*  f17de20:	0fc630f9 */ 	jal	mpEnableAllMultiTracks
 /*  f17de24:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f17de28:	3c02800a */ 	lui	$v0,%hi(g_Vars)
 /*  f17de2c:	24429fc0 */ 	addiu	$v0,$v0,%lo(g_Vars)
@@ -4861,7 +4861,7 @@ glabel var7f1b8228
 /*  f17de38:	10000049 */ 	beqz	$zero,.L0f17df60
 /*  f17de3c:	ac4e0458 */ 	sw	$t6,0x458($v0)
 .L0f17de40:
-/*  f17de40:	0fc63103 */ 	jal	func0f18c40c
+/*  f17de40:	0fc63103 */ 	jal	mpDisableAllMultiTracks
 /*  f17de44:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f17de48:	3c02800a */ 	lui	$v0,%hi(g_Vars)
 /*  f17de4c:	24429fc0 */ 	addiu	$v0,$v0,%lo(g_Vars)
@@ -4870,7 +4870,7 @@ glabel var7f1b8228
 /*  f17de58:	10000041 */ 	beqz	$zero,.L0f17df60
 /*  f17de5c:	ac4f0458 */ 	sw	$t7,0x458($v0)
 .L0f17de60:
-/*  f17de60:	0fc6310c */ 	jal	func0f18c430
+/*  f17de60:	0fc6310c */ 	jal	mpRandomiseMultiTracks
 /*  f17de64:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f17de68:	3c02800a */ 	lui	$v0,%hi(g_Vars)
 /*  f17de6c:	24429fc0 */ 	addiu	$v0,$v0,%lo(g_Vars)
diff --git a/src/game/gamefile.c b/src/game/gamefile.c
index 1afb64f46..58b90b984 100644
--- a/src/game/gamefile.c
+++ b/src/game/gamefile.c
@@ -1404,7 +1404,7 @@ void func0f110b68(void)
 	g_MpSetupSaveFile.teamnames[7][0] = '\0';
 
 	g_MpSetupSaveFile.tracknum = -1;
-	func0f18c3e4();
+	mpEnableAllMultiTracks();
 	g_MpSetupSaveFile.usingmultipletunes = false;
 	g_MpSetupSaveFile.unk89 = 0;
 	g_MpSetupSaveFile.locktype = MPLOCKTYPE_NONE;
diff --git a/src/game/mplayer.c b/src/game/mplayer.c
index 97f1aa057..5fc76a93d 100644
--- a/src/game/mplayer.c
+++ b/src/game/mplayer.c
@@ -5460,79 +5460,52 @@ glabel func0f18c2b0
 /*  f18c300:	27bd0018 */ 	addiu	$sp,$sp,0x18
 );
 
-GLOBAL_ASM(
-glabel func0f18c304
-/*  f18c304:	27bdffe8 */ 	addiu	$sp,$sp,-24
-/*  f18c308:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*  f18c30c:	0fc63065 */ 	jal	mpGetTrackNumAtSlotIndex
-/*  f18c310:	afa5001c */ 	sw	$a1,0x1c($sp)
-/*  f18c314:	8fae001c */ 	lw	$t6,0x1c($sp)
-/*  f18c318:	3c18800b */ 	lui	$t8,%hi(g_MpSetup+0x28)
-/*  f18c31c:	2718cbb0 */ 	addiu	$t8,$t8,%lo(g_MpSetup+0x28)
-/*  f18c320:	11c0000d */ 	beqz	$t6,.L0f18c358
-/*  f18c324:	304a0007 */ 	andi	$t2,$v0,0x7
-/*  f18c328:	000278c3 */ 	sra	$t7,$v0,0x3
-/*  f18c32c:	3c19800b */ 	lui	$t9,%hi(g_MpSetup+0x28)
-/*  f18c330:	2739cbb0 */ 	addiu	$t9,$t9,%lo(g_MpSetup+0x28)
-/*  f18c334:	31f800ff */ 	andi	$t8,$t7,0xff
-/*  f18c338:	03191821 */ 	addu	$v1,$t8,$t9
-/*  f18c33c:	90680065 */ 	lbu	$t0,0x65($v1)
-/*  f18c340:	30490007 */ 	andi	$t1,$v0,0x7
-/*  f18c344:	240a0001 */ 	addiu	$t2,$zero,0x1
-/*  f18c348:	012a6004 */ 	sllv	$t4,$t2,$t1
-/*  f18c34c:	010c6825 */ 	or	$t5,$t0,$t4
-/*  f18c350:	1000000a */ 	beqz	$zero,.L0f18c37c
-/*  f18c354:	a06d0065 */ 	sb	$t5,0x65($v1)
-.L0f18c358:
-/*  f18c358:	000270c3 */ 	sra	$t6,$v0,0x3
-/*  f18c35c:	31cf00ff */ 	andi	$t7,$t6,0xff
-/*  f18c360:	01f81821 */ 	addu	$v1,$t7,$t8
-/*  f18c364:	90790065 */ 	lbu	$t9,0x65($v1)
-/*  f18c368:	24090001 */ 	addiu	$t1,$zero,0x1
-/*  f18c36c:	01494004 */ 	sllv	$t0,$t1,$t2
-/*  f18c370:	01006027 */ 	nor	$t4,$t0,$zero
-/*  f18c374:	032c6824 */ 	and	$t5,$t9,$t4
-/*  f18c378:	a06d0065 */ 	sb	$t5,0x65($v1)
-.L0f18c37c:
-/*  f18c37c:	8fbf0014 */ 	lw	$ra,0x14($sp)
-/*  f18c380:	27bd0018 */ 	addiu	$sp,$sp,0x18
-/*  f18c384:	03e00008 */ 	jr	$ra
-/*  f18c388:	00000000 */ 	sll	$zero,$zero,0x0
-);
+void mpSetMultiTrackSlotEnabled(s32 slot, bool enable)
+{
+	s32 tracknum = mpGetTrackNumAtSlotIndex(slot);
+	u8 value = 1 << (tracknum & 7);
+	u8 index = tracknum >> 3;
 
-void func0f18c38c(s32 slot)
+	if (enable) {
+		g_MpSetupSaveFile.multipletracknums[index] |= value;
+	} else {
+		g_MpSetupSaveFile.multipletracknums[index] &= ~value;
+	}
+}
+
+void mpSetTrackSlotEnabled(s32 slot)
 {
 	if (mpGetUsingMultipleTunes()) {
-		func0f18c304(slot, 1 - func0f18c2b0(slot));
+		mpSetMultiTrackSlotEnabled(slot, 1 - func0f18c2b0(slot));
 	} else {
 		g_MpSetupSaveFile.tracknum = mpGetTrackNumAtSlotIndex(slot);
 	}
 }
 
-void func0f18c3e4(void)
+void mpEnableAllMultiTracks(void)
 {
 	s32 i;
 
 	for (i = 0; i != 6; i++) {
-		g_MpSetupSaveFile.unk8d[i] = -1;
+		g_MpSetupSaveFile.multipletracknums[i] = 0xff;
 	}
 }
 
-void func0f18c40c(void)
+void mpDisableAllMultiTracks(void)
 {
 	s32 i;
 
 	for (i = 0; i != 6; i++) {
-		g_MpSetupSaveFile.unk8d[i] = 0;
+		g_MpSetupSaveFile.multipletracknums[i] = 0;
 	}
 }
 
-void func0f18c430(void)
+void mpRandomiseMultiTracks(void)
 {
 	s32 i;
 
 	for (i = 0; i != 6; i++) {
-		g_MpSetupSaveFile.unk8d[i] = random();
+		g_MpSetupSaveFile.multipletracknums[i] = random();
 	}
 }
 
diff --git a/src/include/game/mplayer.h b/src/include/game/mplayer.h
index ca05c6aa5..766107508 100644
--- a/src/include/game/mplayer.h
+++ b/src/include/game/mplayer.h
@@ -71,11 +71,11 @@ char *mpGetTrackName(s32 slotindex);
 void mpSetUsingMultipleTunes(bool enable);
 bool mpGetUsingMultipleTunes(void);
 u32 func0f18c2b0(s32 slot);
-void func0f18c304(s32 slot, u32 arg1);
-void func0f18c38c(s32 slot);
-void func0f18c3e4(void);
-void func0f18c40c(void);
-void func0f18c430(void);
+void mpSetMultiTrackSlotEnabled(s32 slot, bool enable);
+void mpSetTrackSlotEnabled(s32 slot);
+void mpEnableAllMultiTracks(void);
+void mpDisableAllMultiTracks(void);
+void mpRandomiseMultiTracks(void);
 void mpSetTrackToRandom(void);
 s32 mpGetCurrentTrackSlotNum(void);
 u32 func0f18c4c0(void);
diff --git a/src/include/types.h b/src/include/types.h
index e3e8d1f8f..233ea2a00 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -4165,7 +4165,7 @@ struct savefile_setup {
 	/*0x62*/ u8 usingmultipletunes;
 	/*0x63*/ u8 unk8b;
 	/*0x64*/ s8 tracknum; // -1 = random
-	/*0x8d*/ u8 unk8d[5];
+	/*0x8d*/ u8 multipletracknums[5];
 };
 
 struct mpscenario {