diff --git a/src/include/lib/lib_37650.h b/src/include/lib/lib_37650.h
index 3044c1e6e..796b5644b 100644
--- a/src/include/lib/lib_37650.h
+++ b/src/include/lib/lib_37650.h
@@ -6,6 +6,5 @@
 
 u32 func00037650(void);
 void func00037704(void *arg0, void *arg1);
-u32 func000377e8(void);
 
 #endif
diff --git a/src/lib/ultra/audio/bnkf.c b/src/lib/ultra/audio/bnkf.c
index c93f5ec02..24449e252 100644
--- a/src/lib/ultra/audio/bnkf.c
+++ b/src/lib/ultra/audio/bnkf.c
@@ -6,6 +6,7 @@
 #include "data.h"
 #include "types.h"
 
+void _bnkfPatchBank(ALBank *bank, s32 offset, s32 table);
 void _bnkfPatchInst(ALInstrument *inst, s32 offset, s32 table);
 void _bnkfPatchSound(ALSound *s, s32 offset, s32 table);
 void _bnkfPatchWaveTable(ALWaveTable *w, s32 offset, s32 table);
@@ -68,7 +69,7 @@ glabel func00037704
 /*    3779c:	000e7880 */ 	sll	$t7,$t6,0x2
 /*    377a0:	018fc021 */ 	addu	$t8,$t4,$t7
 /*    377a4:	8f040004 */ 	lw	$a0,0x4($t8)
-/*    377a8:	0c00ddfa */ 	jal	func000377e8
+/*    377a8:	0c00ddfa */ 	jal	_bnkfPatchBank
 /*    377ac:	8fa60020 */ 	lw	$a2,0x20($sp)
 .L000377b0:
 /*    377b0:	8fad001c */ 	lw	$t5,0x1c($sp)
@@ -89,85 +90,29 @@ glabel func00037704
 /*    377e4:	00000000 */ 	nop
 );
 
-GLOBAL_ASM(
-glabel func000377e8
-/*    377e8:	27bdffe0 */ 	addiu	$sp,$sp,-32
-/*    377ec:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*    377f0:	afa40020 */ 	sw	$a0,0x20($sp)
-/*    377f4:	afa50024 */ 	sw	$a1,0x24($sp)
-/*    377f8:	afa60028 */ 	sw	$a2,0x28($sp)
-/*    377fc:	8fae0020 */ 	lw	$t6,0x20($sp)
-/*    37800:	91cf0002 */ 	lbu	$t7,0x2($t6)
-/*    37804:	11e00003 */ 	beqz	$t7,.L00037814
-/*    37808:	00000000 */ 	nop
-/*    3780c:	10000038 */ 	b	.L000378f0
-/*    37810:	00000000 */ 	nop
-.L00037814:
-/*    37814:	8fb90020 */ 	lw	$t9,0x20($sp)
-/*    37818:	24180001 */ 	addiu	$t8,$zero,0x1
-/*    3781c:	a3380002 */ 	sb	$t8,0x2($t9)
-/*    37820:	8fa80020 */ 	lw	$t0,0x20($sp)
-/*    37824:	8d090008 */ 	lw	$t1,0x8($t0)
-/*    37828:	1120000b */ 	beqz	$t1,.L00037858
-/*    3782c:	00000000 */ 	nop
-/*    37830:	8faa0020 */ 	lw	$t2,0x20($sp)
-/*    37834:	8fac0024 */ 	lw	$t4,0x24($sp)
-/*    37838:	8d4b0008 */ 	lw	$t3,0x8($t2)
-/*    3783c:	016c6821 */ 	addu	$t5,$t3,$t4
-/*    37840:	ad4d0008 */ 	sw	$t5,0x8($t2)
-/*    37844:	8fae0020 */ 	lw	$t6,0x20($sp)
-/*    37848:	8fa50024 */ 	lw	$a1,0x24($sp)
-/*    3784c:	8fa60028 */ 	lw	$a2,0x28($sp)
-/*    37850:	0c00de40 */ 	jal	_bnkfPatchInst
-/*    37854:	8dc40008 */ 	lw	$a0,0x8($t6)
-.L00037858:
-/*    37858:	8faf0020 */ 	lw	$t7,0x20($sp)
-/*    3785c:	afa0001c */ 	sw	$zero,0x1c($sp)
-/*    37860:	85f80000 */ 	lh	$t8,0x0($t7)
-/*    37864:	1b000020 */ 	blez	$t8,.L000378e8
-/*    37868:	00000000 */ 	nop
-.L0003786c:
-/*    3786c:	8fa8001c */ 	lw	$t0,0x1c($sp)
-/*    37870:	8fb90020 */ 	lw	$t9,0x20($sp)
-/*    37874:	8fad0024 */ 	lw	$t5,0x24($sp)
-/*    37878:	00084880 */ 	sll	$t1,$t0,0x2
-/*    3787c:	03295821 */ 	addu	$t3,$t9,$t1
-/*    37880:	8d6c000c */ 	lw	$t4,0xc($t3)
-/*    37884:	018d5021 */ 	addu	$t2,$t4,$t5
-/*    37888:	ad6a000c */ 	sw	$t2,0xc($t3)
-/*    3788c:	8faf001c */ 	lw	$t7,0x1c($sp)
-/*    37890:	8fae0020 */ 	lw	$t6,0x20($sp)
-/*    37894:	000fc080 */ 	sll	$t8,$t7,0x2
-/*    37898:	01d84021 */ 	addu	$t0,$t6,$t8
-/*    3789c:	8d19000c */ 	lw	$t9,0xc($t0)
-/*    378a0:	13200009 */ 	beqz	$t9,.L000378c8
-/*    378a4:	00000000 */ 	nop
-/*    378a8:	8fac001c */ 	lw	$t4,0x1c($sp)
-/*    378ac:	8fa90020 */ 	lw	$t1,0x20($sp)
-/*    378b0:	8fa50024 */ 	lw	$a1,0x24($sp)
-/*    378b4:	000c6880 */ 	sll	$t5,$t4,0x2
-/*    378b8:	012d5021 */ 	addu	$t2,$t1,$t5
-/*    378bc:	8d44000c */ 	lw	$a0,0xc($t2)
-/*    378c0:	0c00de40 */ 	jal	_bnkfPatchInst
-/*    378c4:	8fa60028 */ 	lw	$a2,0x28($sp)
-.L000378c8:
-/*    378c8:	8fab001c */ 	lw	$t3,0x1c($sp)
-/*    378cc:	8fae0020 */ 	lw	$t6,0x20($sp)
-/*    378d0:	256f0001 */ 	addiu	$t7,$t3,0x1
-/*    378d4:	afaf001c */ 	sw	$t7,0x1c($sp)
-/*    378d8:	85d80000 */ 	lh	$t8,0x0($t6)
-/*    378dc:	01f8082a */ 	slt	$at,$t7,$t8
-/*    378e0:	1420ffe2 */ 	bnez	$at,.L0003786c
-/*    378e4:	00000000 */ 	nop
-.L000378e8:
-/*    378e8:	10000001 */ 	b	.L000378f0
-/*    378ec:	00000000 */ 	nop
-.L000378f0:
-/*    378f0:	8fbf0014 */ 	lw	$ra,0x14($sp)
-/*    378f4:	27bd0020 */ 	addiu	$sp,$sp,0x20
-/*    378f8:	03e00008 */ 	jr	$ra
-/*    378fc:	00000000 */ 	nop
-);
+void _bnkfPatchBank(ALBank *bank, s32 offset, s32 table)
+{
+	s32 i;
+
+	if (bank->flags) {
+		return;
+	}
+
+	bank->flags = 1;
+
+	if (bank->percussion) {
+		bank->percussion = (ALInstrument *)((u8 *)bank->percussion + offset);
+		_bnkfPatchInst(bank->percussion, offset, table);
+	}
+
+	for (i = 0; i < bank->instCount; i++) {
+		bank->instArray[i] = (ALInstrument *)((u8 *)bank->instArray[i] + offset);
+
+		if (bank->instArray[i]) {
+			_bnkfPatchInst(bank->instArray[i], offset, table);
+		}
+	}
+}
 
 void _bnkfPatchInst(ALInstrument *inst, s32 offset, s32 table)
 {