diff --git a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.cpp b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.cpp
index 810194eed9..ec640ca038 100644
--- a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.cpp
+++ b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.cpp
@@ -83,7 +83,11 @@ void CUCode_AXWii::HandleCommandList()
 					AddToLR(HILO_TO_32(addr), cmd == CMD_SUB_TO_LR_OLD);
 					break;
 
-				case CMD_UNK_03_OLD: curr_idx += 2; break;
+				case CMD_ADD_SUB_TO_LR_OLD:
+					addr_hi = m_cmdlist[curr_idx++];
+					addr_lo = m_cmdlist[curr_idx++];
+					AddSubToLR(HILO_TO_32(addr));
+					break;
 
 				case CMD_PB_ADDR_OLD:
 					addr_hi = m_cmdlist[curr_idx++];
@@ -162,7 +166,11 @@ void CUCode_AXWii::HandleCommandList()
 					AddToLR(HILO_TO_32(addr), cmd == CMD_SUB_TO_LR);
 					break;
 
-				case CMD_UNK_03: curr_idx += 2; break;
+				case CMD_ADD_SUB_TO_LR:
+					addr_hi = m_cmdlist[curr_idx++];
+					addr_lo = m_cmdlist[curr_idx++];
+					AddSubToLR(HILO_TO_32(addr));
+					break;
 
 				case CMD_PROCESS:
 					addr_hi = m_cmdlist[curr_idx++];
@@ -292,6 +300,21 @@ void CUCode_AXWii::AddToLR(u32 val_addr, bool neg)
 	}
 }
 
+void CUCode_AXWii::AddSubToLR(u32 val_addr)
+{
+	int* ptr = (int*)HLEMemory_Get_Pointer(val_addr);
+	for (int i = 0; i < 32 * 3; ++i)
+	{
+		int val = (int)Common::swap32(*ptr++);
+		m_samples_left[i] += val;
+	}
+	for (int i = 0; i < 32 * 3; ++i)
+	{
+		int val = (int)Common::swap32(*ptr++);
+		m_samples_right[i] -= val;
+	}
+}
+
 AXMixControl CUCode_AXWii::ConvertMixerControl(u32 mixer_control)
 {
 	u32 ret = 0;
diff --git a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.h b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.h
index 9c49f35a81..8952961004 100644
--- a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.h
+++ b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AXWii.h
@@ -72,6 +72,7 @@ protected:
 
 	void SetupProcessing(u32 init_addr);
 	void AddToLR(u32 val_addr, bool neg);
+	void AddSubToLR(u32 val_addr);
 	void ProcessPBList(u32 pb_addr);
 	void MixAUXSamples(int aux_id, u32 write_addr, u32 read_addr, u16 volume);
 	void OutputSamples(u32 lr_addr, u32 surround_addr, u16 volume,
@@ -84,7 +85,7 @@ private:
 		CMD_SETUP = 0x00,
 		CMD_ADD_TO_LR = 0x01,
 		CMD_SUB_TO_LR = 0x02,
-		CMD_UNK_03 = 0x03,
+		CMD_ADD_SUB_TO_LR = 0x03,
 		CMD_PROCESS = 0x04,
 		CMD_MIX_AUXA = 0x05,
 		CMD_MIX_AUXB = 0x06,
@@ -106,7 +107,7 @@ private:
 		CMD_SETUP_OLD = 0x00,
 		CMD_ADD_TO_LR_OLD = 0x01,
 		CMD_SUB_TO_LR_OLD = 0x02,
-		CMD_UNK_03_OLD = 0x03,
+		CMD_ADD_SUB_TO_LR_OLD = 0x03,
 		CMD_PB_ADDR_OLD = 0x04,
 		CMD_PROCESS_OLD = 0x05,
 		CMD_MIX_AUXA_OLD = 0x06,