diff --git a/src/m4a_1.s b/src/m4a_1.s
index 62b913c86..f71a5546e 100644
--- a/src/m4a_1.s
+++ b/src/m4a_1.s
@@ -302,7 +302,7 @@ _081DD044:
 	ldrb r0, [r4, o_SoundChannel_type]
 	tst r0, TONEDATA_TYPE_CMP | TONEDATA_TYPE_REV
 	beq _081DD068
-	bl sub_82DF49C
+	bl SoundMainRAM_Unk1
 	b _081DD228
 _081DD068:
 	mov r10, r10, lsl 16
@@ -465,8 +465,9 @@ _081DD25E:
 	.pool
 	thumb_func_end SoundMainRAM
 
-	arm_func_start sub_82DF49C
-sub_82DF49C:
+@ Not present in GBA SDK 3.0
+	arm_func_start SoundMainRAM_Unk1
+SoundMainRAM_Unk1:
 	ldr r6, [r4, o_SoundChannel_wav]
 	ldrb r0, [r4, o_SoundChannel_statusFlags]
 	tst r0, SOUND_CHANNEL_SF_SPECIAL
@@ -505,10 +506,10 @@ _081DD2B4:
 	ldrb r0, [r4, o_SoundChannel_type]
 	tst r0, TONEDATA_TYPE_REV
 	bne _081DD3C0
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	mov r0, r1
 	add r3, r3, 0x1
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	sub r1, r1, r0
 _081DD308:
 	ldr r6, [r5]
@@ -534,11 +535,11 @@ _081DD310:
 	b _081DD364
 _081DD358:
 	add r3, r3, lr
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	mov r0, r1
 _081DD364:
 	add r3, r3, 0x1
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	sub r1, r1, r0
 _081DD370:
 	adds r5, r5, 0x40000000
@@ -565,10 +566,10 @@ _081DD3B0:
 	b _081DD3B0
 _081DD3C0:
 	sub r3, r3, 0x1
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	mov r0, r1
 	sub r3, r3, 0x1
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	sub r1, r1, r0
 _081DD3D8:
 	ldr r6, [r5]
@@ -594,11 +595,11 @@ _081DD3E0:
 	b _081DD434
 _081DD428:
 	sub r3, r3, lr
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	mov r0, r1
 _081DD434:
 	sub r3, r3, 0x1
-	bl sub_82DF758
+	bl SoundMainRAM_Unk2
 	sub r1, r1, r0
 _081DD440:
 	adds r5, r5, 0x40000000
@@ -663,10 +664,11 @@ _081DD4F4:
 	str r7, [r5, 0x630]
 	str r6, [r5], 0x4
 	pop {r8,r12,pc}
-	arm_func_end sub_82DF49C
+	arm_func_end SoundMainRAM_Unk1
 
-	arm_func_start sub_82DF758
-sub_82DF758:
+@ Not present in GBA SDK 3.0
+	arm_func_start SoundMainRAM_Unk2
+SoundMainRAM_Unk2:
 	push {r0,r2,r5-r7,lr}
 	mov r0, r3, lsr 6
 	ldr r1, [r4, o_SoundChannel_xpi]
@@ -704,7 +706,7 @@ _081DD594:
 	ldrsb r1, [r5, r0]
 	pop {r0,r2,r5-r7,pc}
 	.pool
-	arm_func_end sub_82DF758
+	arm_func_end SoundMainRAM_Unk2
 
 	thumb_func_start SoundMainBTM
 SoundMainBTM: