diff --git a/src/include/lib/lib_3a100.h b/src/include/lib/lib_3a100.h
index b5ba2bb81..31ee310eb 100644
--- a/src/include/lib/lib_3a100.h
+++ b/src/include/lib/lib_3a100.h
@@ -10,6 +10,6 @@ u32 func0003b370(void);
 u32 func0003b54c(void);
 u32 func0003b710(void);
 f32 func0003b9d4(s32 arg0);
-u32 func0003ba64(void);
+void func0003ba64(ALFxRef fx, f32 outputrate);
 
 #endif
diff --git a/src/include/lib/lib_3e3e0.h b/src/include/lib/lib_3e3e0.h
index 577b2962a..1e6ca922b 100644
--- a/src/include/lib/lib_3e3e0.h
+++ b/src/include/lib/lib_3e3e0.h
@@ -8,6 +8,6 @@ void func0003e3e0(N_ALVoice *v, f32 arg1);
 u32 func0003e490(void);
 ALFxRef func0003e540(u8 arg0);
 ALFxRef func0003e5b8(u8 arg0);
-void func0003e674(ALFxRef fx, u8 arg1, void *param);
+void func0003e674(ALFxRef fx, s16 arg1, void *param);
 
 #endif
diff --git a/src/lib/naudio/n_synsetfxparam.c b/src/lib/naudio/n_synsetfxparam.c
index 83287285e..b7a1b1d6e 100644
--- a/src/lib/naudio/n_synsetfxparam.c
+++ b/src/lib/naudio/n_synsetfxparam.c
@@ -1,7 +1,5 @@
 #include "n_synthInternals.h"
 
-const u32 var70054ae0[] = {0x3dcccccd};
-
 void n_alSynSetFXParam(ALFxRef fx, s16 paramID, void *param)
 {
 	ALFx *f = (ALFx *)fx;
@@ -9,55 +7,15 @@ void n_alSynSetFXParam(ALFxRef fx, s16 paramID, void *param)
 	n_alFxParamHdl(f, (s32)paramID, param);
 }
 
-GLOBAL_ASM(
-glabel func0003e674
-/*    3e674:	27bdffe8 */ 	addiu	$sp,$sp,-24
-/*    3e678:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*    3e67c:	afa40018 */ 	sw	$a0,0x18($sp)
-/*    3e680:	afa5001c */ 	sw	$a1,0x1c($sp)
-/*    3e684:	afa60020 */ 	sw	$a2,0x20($sp)
-/*    3e688:	87ae001e */ 	lh	$t6,0x1e($sp)
-/*    3e68c:	24010008 */ 	addiu	$at,$zero,0x8
-/*    3e690:	15c1000e */ 	bne	$t6,$at,.L0003e6cc
-/*    3e694:	00000000 */ 	nop
-/*    3e698:	8faf0020 */ 	lw	$t7,0x20($sp)
-/*    3e69c:	3c017005 */ 	lui	$at,%hi(var70054ae0)
-/*    3e6a0:	c4284ae0 */ 	lwc1	$f8,%lo(var70054ae0)($at)
-/*    3e6a4:	8df80000 */ 	lw	$t8,0x0($t7)
-/*    3e6a8:	8fa90018 */ 	lw	$t1,0x18($sp)
-/*    3e6ac:	44982000 */ 	mtc1	$t8,$f4
-/*    3e6b0:	00000000 */ 	nop
-/*    3e6b4:	468021a0 */ 	cvt.s.w	$f6,$f4
-/*    3e6b8:	46083282 */ 	mul.s	$f10,$f6,$f8
-/*    3e6bc:	4600540d */ 	trunc.w.s	$f16,$f10
-/*    3e6c0:	44088000 */ 	mfc1	$t0,$f16
-/*    3e6c4:	10000009 */ 	b	.L0003e6ec
-/*    3e6c8:	a5280002 */ 	sh	$t0,0x2($t1)
-.L0003e6cc:
-/*    3e6cc:	87aa001e */ 	lh	$t2,0x1e($sp)
-/*    3e6d0:	24010009 */ 	addiu	$at,$zero,0x9
-/*    3e6d4:	15410005 */ 	bne	$t2,$at,.L0003e6ec
-/*    3e6d8:	00000000 */ 	nop
-/*    3e6dc:	8fab0020 */ 	lw	$t3,0x20($sp)
-/*    3e6e0:	8fad0018 */ 	lw	$t5,0x18($sp)
-/*    3e6e4:	8d6c0000 */ 	lw	$t4,0x0($t3)
-/*    3e6e8:	a5ac0000 */ 	sh	$t4,0x0($t5)
-.L0003e6ec:
-/*    3e6ec:	3c0e8006 */ 	lui	$t6,%hi(n_syn)
-/*    3e6f0:	8dcef114 */ 	lw	$t6,%lo(n_syn)($t6)
-/*    3e6f4:	8fa40018 */ 	lw	$a0,0x18($sp)
-/*    3e6f8:	8dcf0040 */ 	lw	$t7,0x40($t6)
-/*    3e6fc:	448f9000 */ 	mtc1	$t7,$f18
-/*    3e700:	00000000 */ 	nop
-/*    3e704:	468094a0 */ 	cvt.s.w	$f18,$f18
-/*    3e708:	44059000 */ 	mfc1	$a1,$f18
-/*    3e70c:	0c00ee99 */ 	jal	func0003ba64
-/*    3e710:	00000000 */ 	nop
-/*    3e714:	10000001 */ 	b	.L0003e71c
-/*    3e718:	00000000 */ 	nop
-.L0003e71c:
-/*    3e71c:	8fbf0014 */ 	lw	$ra,0x14($sp)
-/*    3e720:	27bd0018 */ 	addiu	$sp,$sp,0x18
-/*    3e724:	03e00008 */ 	jr	$ra
-/*    3e728:	00000000 */ 	nop
-);
+void func0003ba64(ALFxRef fx, f32 outputrate);
+
+void func0003e674(ALFxRef fx, s16 arg1, void *param)
+{
+	if (arg1 == 8) {
+		((s16 *)fx)[1] = (*(s32 *)param * 0.1f);
+	} else if (arg1 == 9) {
+		*(u16 *)fx = *(s32 *)param;
+	}
+
+	func0003ba64(fx, n_syn->outputRate);
+}