diff --git a/tools/vio2sf/src/vio2sf/desmume/SPU.cpp b/tools/vio2sf/src/vio2sf/desmume/SPU.cpp
index 5a4ccd767..eea2f48db 100644
--- a/tools/vio2sf/src/vio2sf/desmume/SPU.cpp
+++ b/tools/vio2sf/src/vio2sf/desmume/SPU.cpp
@@ -48,9 +48,6 @@
 #include "NDSSystem.h"
 #include "matrix.h"
 
-
-
-
 //===================CONFIGURATION========================
 #include "src/xsfc/drvimpl.h"
 extern "C" unsigned long dwInterpolation;
@@ -205,6 +202,7 @@ extern "C" void SPU_Reset(void)
 static long tot_samples;
 static long update_trunc;
 
+
 extern "C" int SPU_Init(int coreid, int buffersize)
 {
 	int i, j;
@@ -546,16 +544,18 @@ static FORCEINLINE s32 Interpolate(SPUInterpolationMode INTERPOLATE_MODE, s32 a,
 typedef void			(*TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT)(unsigned long addr, int type);
 typedef BOOL			(*TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED)(unsigned long addr);
 typedef unsigned long	(*TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME)(unsigned long addr);
+typedef BOOL			(*TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE)();
 double round(double r) 
 {
     return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5);
 }
 
-extern "C" TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT		addInstrument;
-extern "C" TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED	isInstrumentMuted;
-extern "C" TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME	getInstrumentVolume;
+extern "C" TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT				addInstrument;
+extern "C" TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED			isInstrumentMuted;
+extern "C" TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME			getInstrumentVolume;
+extern "C" TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE	isInstrumentSelectionActive;
 
-static FORCEINLINE void Fetch8BitData(SPUInterpolationMode INTERPOLATE_MODE, channel_struct *chan, s32 *data, bool INSTRUMENT_EDIT)
+static FORCEINLINE void Fetch8BitData(SPUInterpolationMode INTERPOLATE_MODE, channel_struct *chan, s32 *data)
 {
 	u32 loc = sputrunc(chan->sampcnt);
 	if(INTERPOLATE_MODE != SPUInterpolation_None)
@@ -570,8 +570,7 @@ static FORCEINLINE void Fetch8BitData(SPUInterpolationMode INTERPOLATE_MODE, cha
 	else
 		*data = (s32)chan->buf8[loc] << 8;
 
-	//if (addInstrument && isInstrumentMuted && getInstrumentVolume) 
-	if(INSTRUMENT_EDIT)
+	if (isInstrumentSelectionActive && isInstrumentSelectionActive() && addInstrument && isInstrumentMuted && getInstrumentVolume) 
 	{
 		addInstrument(chan->addr, 0);
 		if (isInstrumentMuted(chan->addr)) *data = 0;
@@ -579,7 +578,7 @@ static FORCEINLINE void Fetch8BitData(SPUInterpolationMode INTERPOLATE_MODE, cha
 	}
 }
 
-static FORCEINLINE void Fetch16BitData(SPUInterpolationMode INTERPOLATE_MODE, const channel_struct * const chan, s32 *data, bool INSTRUMENT_EDIT)
+static FORCEINLINE void Fetch16BitData(SPUInterpolationMode INTERPOLATE_MODE, const channel_struct * const chan, s32 *data)
 {
 	const s16* const buf16 = chan->buf16;
 	const int shift = 1;
@@ -597,8 +596,7 @@ static FORCEINLINE void Fetch16BitData(SPUInterpolationMode INTERPOLATE_MODE, co
 	else
 		*data = (s32)buf16[sputrunc(chan->sampcnt)];
 
-	if(INSTRUMENT_EDIT)
-	//if (addInstrument && isInstrumentMuted && getInstrumentVolume) 
+	if (isInstrumentSelectionActive && isInstrumentSelectionActive() && addInstrument && isInstrumentMuted && getInstrumentVolume) 
 	{
 		addInstrument(chan->addr, 1);
 		if (isInstrumentMuted(chan->addr)) *data = 0;
@@ -606,7 +604,7 @@ static FORCEINLINE void Fetch16BitData(SPUInterpolationMode INTERPOLATE_MODE, co
 	}
 }
 
-static FORCEINLINE void FetchADPCMData(SPUInterpolationMode INTERPOLATE_MODE, channel_struct * const chan, s32 * const data, bool INSTRUMENT_EDIT)
+static FORCEINLINE void FetchADPCMData(SPUInterpolationMode INTERPOLATE_MODE, channel_struct * const chan, s32 * const data)
 {
 	// No sense decoding, just return the last sample
 	if (chan->lastsampcnt != sputrunc(chan->sampcnt)){
@@ -638,8 +636,7 @@ static FORCEINLINE void FetchADPCMData(SPUInterpolationMode INTERPOLATE_MODE, ch
 	else
 		*data = (s32)chan->pcm16b;
 
-	if(INSTRUMENT_EDIT)
-	//if (addInstrument && isInstrumentMuted && getInstrumentVolume) 
+	if (isInstrumentSelectionActive && isInstrumentSelectionActive() && addInstrument && isInstrumentMuted && getInstrumentVolume) 
 	{
 		addInstrument(chan->addr, 2);
 		if (isInstrumentMuted(chan->addr)) *data = 0;
@@ -647,7 +644,7 @@ static FORCEINLINE void FetchADPCMData(SPUInterpolationMode INTERPOLATE_MODE, ch
 	}
 }
 
-static FORCEINLINE void FetchPSGData(channel_struct *chan, s32 *data, bool INSTRUMENT_EDIT)
+static FORCEINLINE void FetchPSGData(channel_struct *chan, s32 *data)
 {
 	if(chan->num < 8)
 	{
@@ -685,8 +682,7 @@ static FORCEINLINE void FetchPSGData(channel_struct *chan, s32 *data, bool INSTR
 		*data = (s32)chan->psgnoise_last;
 	}
 
-	if(INSTRUMENT_EDIT)
-	//if (addInstrument && isInstrumentMuted && getInstrumentVolume) 
+	if (isInstrumentSelectionActive && isInstrumentSelectionActive() && addInstrument && isInstrumentMuted && getInstrumentVolume) 
 	{
 		addInstrument(0, 3);
 		if (isInstrumentMuted(0)) *data = 0;
@@ -789,7 +785,7 @@ FORCEINLINE static void SPU_Mix(int CHANNELS, SPU_struct* SPU, channel_struct *c
 	}
 }
 
-FORCEINLINE static void ____SPU_ChanUpdate(int CHANNELS, int FORMAT, SPUInterpolationMode INTERPOLATE_MODE, SPU_struct* const SPU, channel_struct* const chan, bool INSTRUMENT_EDIT)
+FORCEINLINE static void ____SPU_ChanUpdate(int CHANNELS, int FORMAT, SPUInterpolationMode INTERPOLATE_MODE, SPU_struct* const SPU, channel_struct* const chan)
 {
 	for (; SPU->bufpos < SPU->buflength; SPU->bufpos++)
 	{
@@ -798,10 +794,10 @@ FORCEINLINE static void ____SPU_ChanUpdate(int CHANNELS, int FORMAT, SPUInterpol
 			s32 data;
 			switch(FORMAT)
 			{
-				case 0: Fetch8BitData(INTERPOLATE_MODE, chan, &data, INSTRUMENT_EDIT); break;
-				case 1: Fetch16BitData(INTERPOLATE_MODE, chan, &data, INSTRUMENT_EDIT); break;
-				case 2: FetchADPCMData(INTERPOLATE_MODE, chan, &data, INSTRUMENT_EDIT); break;
-				case 3: FetchPSGData(chan, &data, INSTRUMENT_EDIT); break;
+				case 0: Fetch8BitData(INTERPOLATE_MODE, chan, &data); break;
+				case 1: Fetch16BitData(INTERPOLATE_MODE, chan, &data); break;
+				case 2: FetchADPCMData(INTERPOLATE_MODE, chan, &data); break;
+				case 3: FetchPSGData(chan, &data); break;
 			}
 			SPU_Mix(CHANNELS, SPU, chan, data);
 		}
@@ -814,26 +810,26 @@ FORCEINLINE static void ____SPU_ChanUpdate(int CHANNELS, int FORMAT, SPUInterpol
 	}
 }
 
-FORCEINLINE static void ___SPU_ChanUpdate(int FORMAT, SPUInterpolationMode INTERPOLATE_MODE, const bool actuallyMix, SPU_struct* const SPU, channel_struct* const chan, bool INSTRUMENT_EDIT)
+FORCEINLINE static void ___SPU_ChanUpdate(int FORMAT, SPUInterpolationMode INTERPOLATE_MODE, const bool actuallyMix, SPU_struct* const SPU, channel_struct* const chan)
 {
 	if(!actuallyMix)
-		____SPU_ChanUpdate(-1,FORMAT,INTERPOLATE_MODE,SPU,chan,INSTRUMENT_EDIT);
+		____SPU_ChanUpdate(-1,FORMAT,INTERPOLATE_MODE,SPU,chan);
 	else if (chan->pan == 0)
-		____SPU_ChanUpdate(0,FORMAT,INTERPOLATE_MODE,SPU,chan,INSTRUMENT_EDIT);
+		____SPU_ChanUpdate(0,FORMAT,INTERPOLATE_MODE,SPU,chan);
 	else if (chan->pan == 127)
-		____SPU_ChanUpdate(2,FORMAT,INTERPOLATE_MODE,SPU,chan,INSTRUMENT_EDIT);
+		____SPU_ChanUpdate(2,FORMAT,INTERPOLATE_MODE,SPU,chan);
 	else
-		____SPU_ChanUpdate(1,FORMAT,INTERPOLATE_MODE,SPU,chan,INSTRUMENT_EDIT);
+		____SPU_ChanUpdate(1,FORMAT,INTERPOLATE_MODE,SPU,chan);
 }
 
-FORCEINLINE static void __SPU_ChanUpdate(SPUInterpolationMode INTERPOLATE_MODE, const bool actuallyMix, SPU_struct* const SPU, channel_struct* const chan, bool INSTRUMENT_EDIT)
+FORCEINLINE static void __SPU_ChanUpdate(SPUInterpolationMode INTERPOLATE_MODE, const bool actuallyMix, SPU_struct* const SPU, channel_struct* const chan)
 {
-	___SPU_ChanUpdate(chan->format,INTERPOLATE_MODE,actuallyMix, SPU, chan, INSTRUMENT_EDIT);
+	___SPU_ChanUpdate(chan->format,INTERPOLATE_MODE,actuallyMix, SPU, chan);
 }
 
-FORCEINLINE static void _SPU_ChanUpdate(const bool actuallyMix, SPU_struct* const SPU, channel_struct* const chan, bool INSTRUMENT_EDIT)
+FORCEINLINE static void _SPU_ChanUpdate(const bool actuallyMix, SPU_struct* const SPU, channel_struct* const chan)
 {
-	__SPU_ChanUpdate(spuInterpolationMode(),actuallyMix, SPU, chan,INSTRUMENT_EDIT);
+	__SPU_ChanUpdate(spuInterpolationMode(),actuallyMix, SPU, chan);
 }
 
 
@@ -870,9 +866,7 @@ static void SPU_MixAudio(bool actuallyMix, SPU_struct *SPU, int length)
 		SPU->buflength = length;
 
 		// Mix audio
-		if (addInstrument && isInstrumentMuted && getInstrumentVolume) 
-			_SPU_ChanUpdate(!isChannelMuted(i) && actuallyMix, SPU, chan, true);
-		else _SPU_ChanUpdate(!isChannelMuted(i) && actuallyMix, SPU, chan, false);
+		_SPU_ChanUpdate(!isChannelMuted(i) && actuallyMix, SPU, chan);
 	}
 
 	// convert from 32-bit->16-bit
diff --git a/tools/vio2sf/src/vio2sf/desmume/soundView.cpp b/tools/vio2sf/src/vio2sf/desmume/soundView.cpp
index 404d13a6c..2f1847310 100644
--- a/tools/vio2sf/src/vio2sf/desmume/soundView.cpp
+++ b/tools/vio2sf/src/vio2sf/desmume/soundView.cpp
@@ -104,6 +104,12 @@ extern "C" int SoundView_DlgOpen(HINSTANCE hAppInst)
 {
 	HWND hDlg;
 
+	if(SoundView_Data != NULL)
+	{
+		SetWindowPos(SoundView_Data->hDlg,HWND_TOP,0,0,0,0,SWP_NOSIZE|SWP_NOMOVE);
+		return 0;
+	}
+
 	SoundView_Data = new SoundView_DataStruct();
 	if(SoundView_Data == NULL)
 		return 0;
diff --git a/tools/vio2sf/src/xsfc/in_xsf.cpp b/tools/vio2sf/src/xsfc/in_xsf.cpp
index 18d607ea4..b62923b04 100644
--- a/tools/vio2sf/src/xsfc/in_xsf.cpp
+++ b/tools/vio2sf/src/xsfc/in_xsf.cpp
@@ -268,10 +268,12 @@ public:
 			return false;
 		}
 
-		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT,				addInstrument);
-		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED,			isInstrumentMuted);
-		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME,		getInstrumentVolume);
+		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT,					addInstrument);
+		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED,				isInstrumentMuted);
+		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME,			getInstrumentVolume);
+		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE,	isInstrumentSelectionActive);
 		lpif->SetExtendParamImmediate(EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW,		openSoundView);
+
 		
 		return true;
 	}
@@ -1024,7 +1026,7 @@ protected:
 						int request2 = ::InterlockedExchange((LPLONG)&m_lRequest, 0);
 						if (request2 & (1 << REQUEST_STOP))
 						{
-			 				request1 |= (1 << REQUEST_STOP);
+							request1 |= (1 << REQUEST_STOP);
 							break;
 						}
 					}
@@ -1123,7 +1125,7 @@ protected:
 			{
 				xsfdrv.seek_kil = 1;
 				Request(REQUEST_STOP);
-
+				
 				MSG msg;
 				while( PeekMessage( &msg, 0, 0, 0, PM_NOREMOVE ) )
 					if( GetMessage( &msg, 0,  0, 0)>0 ) {
@@ -1131,6 +1133,7 @@ protected:
 						DispatchMessage(&msg);
 					}
 
+
 			} while (::WaitForSingleObject(m_hThread, 20) == WAIT_TIMEOUT);
 			::CloseHandle(m_hThread);
 			m_hThread = NULL;
diff --git a/tools/vio2sf/src/xsfc/in_xsfcfg.cpp b/tools/vio2sf/src/xsfc/in_xsfcfg.cpp
index e88273392..3c51a24f1 100644
--- a/tools/vio2sf/src/xsfc/in_xsfcfg.cpp
+++ b/tools/vio2sf/src/xsfc/in_xsfcfg.cpp
@@ -189,6 +189,11 @@ unsigned long GetDlgItemHex(HWND wnd, UINT wndMsg)
 HWND dlgInstrumentSelection=0;
 HWND dlgMixerInstrument[50];
 
+BOOL isInstrumentSelectionActive()
+{
+	return (dlgInstrumentSelection != 0);
+}
+
 class Instrument
 {
 public:
@@ -558,6 +563,7 @@ BOOL CALLBACK dlgProcInstrumentSelection(HWND dlg, UINT message, WPARAM wParam,
 	}
 	return FALSE;
 }
+
 static BOOL CALLBACK DialogProcPref(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
 	static bool initialized = false;
@@ -567,7 +573,7 @@ static BOOL CALLBACK DialogProcPref(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPAR
 		switch (GET_WM_COMMAND_ID(wParam, lParam))
 		{
 		case IDC_BUTTON_VIEWSPU:
-				if(soundViewCallbacks.doOpenSoundView) soundViewCallbacks.doOpenSoundView(hDLL);
+			if(soundViewCallbacks.doOpenSoundView) soundViewCallbacks.doOpenSoundView(hDLL);
 			break;
 			
 		case IDC_BUTTON_INSTRUMENTSELECTION:
@@ -587,6 +593,7 @@ static BOOL CALLBACK DialogProcPref(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPAR
 				}
 			}
 			break;
+
 		case IDC_COMBO_INTERPOLATION:
 			if (GET_WM_COMMAND_CMD(wParam, lParam) == CBN_SELCHANGE)
 			{
diff --git a/tools/vio2sf/src/xsfc/in_xsfcfg.h b/tools/vio2sf/src/xsfc/in_xsfcfg.h
index 93774489a..1ca08a3bc 100644
--- a/tools/vio2sf/src/xsfc/in_xsfcfg.h
+++ b/tools/vio2sf/src/xsfc/in_xsfcfg.h
@@ -14,9 +14,9 @@ void winamp_config_dialog(HWND hwndWinamp, HWND hwndParent);
 void addInstrument(unsigned long addr, int type);
 BOOL isInstrumentMuted(unsigned long addr);
 unsigned long getInstrumentVolume(unsigned long addr);
+BOOL isInstrumentSelectionActive();
 void openSoundView(void* callback);
 
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/tools/vio2sf/src/xsfc/xsfdrv.c b/tools/vio2sf/src/xsfc/xsfdrv.c
index 4c54125e3..98525071e 100644
--- a/tools/vio2sf/src/xsfc/xsfdrv.c
+++ b/tools/vio2sf/src/xsfc/xsfdrv.c
@@ -57,11 +57,13 @@ static void PASCAL XSFSetExtendParam(DWORD dwId, LPCWSTR lpPtr)
 }
 #endif
 
-TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT		addInstrument=0;
-TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED	isInstrumentMuted=0;
-TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME getInstrumentVolume=0;
+TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT				addInstrument=0;
+TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED			isInstrumentMuted=0;
+TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME			getInstrumentVolume=0;
+TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE	isInstrumentSelectionActive=0;
 TYPE_EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW openSoundView=0;
 
+
 int SoundView_DlgOpen(HINSTANCE hAppIndst);
 void SoundView_DlgClose();
 
@@ -84,7 +86,6 @@ typedef struct CallbackSet
 struct CallbackSet soundViewCallbacks = { &doOpenSoundView, &killSoundView };
 
 
-
 static void PASCAL XSFSetExtendParamImmediate(DWORD dwId, LPVOID lpPtr)
 {
 	switch(dwId)
@@ -93,12 +94,14 @@ static void PASCAL XSFSetExtendParamImmediate(DWORD dwId, LPVOID lpPtr)
 		dwInterpolation = *(unsigned long*)lpPtr;
 		break;
 
-	case EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT:			addInstrument =			(TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT)			lpPtr; break;
-	case EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED:		isInstrumentMuted =		(TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED)		lpPtr; break;
-	case EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME:	getInstrumentVolume =	(TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME)	lpPtr; break;
-	case EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW:			openSoundView =	(TYPE_EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW)	lpPtr; 
+	case EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT:					addInstrument =					(TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT)					lpPtr; break;
+	case EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED:				isInstrumentMuted =				(TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED)				lpPtr; break;
+	case EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME:			getInstrumentVolume =			(TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME)			lpPtr; break;
+	case EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE:	isInstrumentSelectionActive =	(TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE)	lpPtr; break;
+	case EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW:			
+		openSoundView =	(TYPE_EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW)	lpPtr; 
 		openSoundView(&soundViewCallbacks);
-		break;
+	break;
 	}
 }
 
diff --git a/tools/vio2sf/src/xsfc/xsfdrv.h b/tools/vio2sf/src/xsfc/xsfdrv.h
index 95b807f8a..d0f0c02f6 100644
--- a/tools/vio2sf/src/xsfc/xsfdrv.h
+++ b/tools/vio2sf/src/xsfc/xsfdrv.h
@@ -28,14 +28,16 @@ typedef struct
 #define EXTEND_PARAM_IMMEDIATE_INTERPOLATION_LINEAR 1
 #define EXTEND_PARAM_IMMEDIATE_INTERPOLATION_COSINE 2
 
-#define EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT			1
-#define EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED		2
-#define EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME		3
-#define EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW			4
+#define EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT				1
+#define EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED			2
+#define EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME			3
+#define EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE	4
+#define EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW			5
 
 typedef void (*TYPE_EXTEND_PARAM_IMMEDIATE_ADDINSTRUMENT)(unsigned long addr, int type);
 typedef BOOL (*TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTMUTED)(unsigned long addr);
 typedef unsigned long (*TYPE_EXTEND_PARAM_IMMEDIATE_GETINSTRUMENTVOLUME)(unsigned long addr);
+typedef BOOL (*TYPE_EXTEND_PARAM_IMMEDIATE_ISINSTRUMENTSELECTIONACTIVE)();
 typedef unsigned long (*TYPE_EXTEND_PARAM_IMMEDIATE_OPENSOUNDVIEW)(void* callback);
 
 typedef IXSFDRV * (PASCAL * LPFNXSFDRVSETUP)(LPFNGETLIB_XSFDRV lpfn, void *lpWork);
diff --git a/tools/vio2sf/src/xsfc/xsfui.rc b/tools/vio2sf/src/xsfc/xsfui.rc
index 6ec6114f9..09ac23243 100644
--- a/tools/vio2sf/src/xsfc/xsfui.rc
+++ b/tools/vio2sf/src/xsfc/xsfui.rc
@@ -91,7 +91,7 @@ BEGIN
     PUSHBUTTON      "Cancel",IDCANCEL,129,181,35,15,NOT WS_VISIBLE
     COMBOBOX        IDC_COMBO_INTERPOLATION,10,156,78,55,CBS_DROPDOWNLIST | WS_VSCROLL | WS_TABSTOP
     PUSHBUTTON      "Instruments",IDC_BUTTON_INSTRUMENTSELECTION,70,12,50,14
-    PUSHBUTTON      "View SPU",IDC_BUTTON_VIEWSPU,125,12,37,14
+    PUSHBUTTON      "View SPU",IDC_BUTTON_VIEWSPU,123,12,37,14
 END