diff --git a/src/include/types.h b/src/include/types.h
index b64075df3..f023a703b 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -2143,7 +2143,10 @@ struct sndstate {
 	/*0x34*/ u32 unk34;
 	/*0x38*/ u32 unk38;
 	/*0x3c*/ u32 unk3c;
-	/*0x40*/ u32 unk40;
+	/*0x40*/ u8 unk40;
+	/*0x41*/ u8 unk41;
+	/*0x42*/ u8 unk42;
+	/*0x43*/ u8 unk43;
 	/*0x44*/ u8 flags;
 	/*0x45*/ u8 playing;
 #if VERSION >= VERSION_NTSC_1_0
diff --git a/src/lib/naudio/n_sndplayer.c b/src/lib/naudio/n_sndplayer.c
index 44971dffb..641e6a980 100644
--- a/src/lib/naudio/n_sndplayer.c
+++ b/src/lib/naudio/n_sndplayer.c
@@ -3347,20 +3347,12 @@ void sndpFreeState(struct sndstate *state)
 	}
 }
 
-GLOBAL_ASM(
-glabel func000337c8
-/*    337c8:	30a500ff */ 	andi	$a1,$a1,0xff
-/*    337cc:	10800004 */ 	beqz	$a0,.L000337e0
-/*    337d0:	00000000 */ 	nop
-/*    337d4:	00057400 */ 	sll	$t6,$a1,0x10
-/*    337d8:	000e7c03 */ 	sra	$t7,$t6,0x10
-/*    337dc:	a08f0040 */ 	sb	$t7,0x40($a0)
-.L000337e0:
-/*    337e0:	03e00008 */ 	jr	$ra
-/*    337e4:	00000000 */ 	nop
-/*    337e8:	03e00008 */ 	jr	$ra
-/*    337ec:	00000000 */ 	nop
-);
+void func000337c8(struct sndstate *state, u8 arg1)
+{
+	if (state) {
+		state->unk40 = (s16)arg1;
+	}
+}
 
 bool audioIsPlaying(struct sndstate *state)
 {