diff --git a/Sources/VLDocument.h b/Sources/VLDocument.h
index 2f0e416..11b18b4 100644
--- a/Sources/VLDocument.h
+++ b/Sources/VLDocument.h
@@ -45,6 +45,7 @@ enum {
 	NSMutableDictionary*validTmpFiles;
 	int					repeatVolta;
 	bool				brandNew;
+	bool				hasMusicSequence;
 	VLSheetWindow *		sheetWin;
 	VLLogWindow *		logWin;
 	VLPDFWindow *		pdfWin;
diff --git a/Sources/VLDocument.mm b/Sources/VLDocument.mm
index d3e8087..385dca9 100644
--- a/Sources/VLDocument.mm
+++ b/Sources/VLDocument.mm
@@ -91,6 +91,7 @@
 		vcsWrapper			= nil;
 		repeatVolta			= 2;
 		brandNew			= true;
+		hasMusicSequence	= false;
 		playRate			= 1.0;
 		observers			= [[NSMutableArray alloc] init];
 		validTmpFiles		= [[NSMutableDictionary alloc] initWithCapacity:10];
@@ -112,6 +113,7 @@
 
 - (void)updateChangeCount:(NSDocumentChangeType)changeType
 {
+	hasMusicSequence = true;
 	[validTmpFiles removeAllObjects];
 	[super updateChangeCount:changeType];
 }
@@ -495,30 +497,35 @@
 
 - (IBAction) play:(id)sender
 {
-	[self createTmpFileWithExtension:@"mid" ofType:@"VLMIDIType"];
+	if (hasMusicSequence) {
+		VLSoundOut::Instance()->PlaySequence(NULL);
+	} else {
+		[self createTmpFileWithExtension:@"mid" ofType:@"VLMIDIType"];
 
-	MusicSequence	music;
-	NewMusicSequence(&music);
+		MusicSequence	music;
+		NewMusicSequence(&music);
 
-	FSRef			fsRef;
-	CFURLGetFSRef((CFURLRef)[self fileURLWithExtension:@"mid"], &fsRef);
+		FSRef			fsRef;
+		CFURLGetFSRef((CFURLRef)[self fileURLWithExtension:@"mid"], &fsRef);
 
-	MusicSequenceLoadSMFWithFlags(music, &fsRef, 
-								  kMusicSequenceLoadSMF_ChannelsToTracks);
+		MusicSequenceLoadSMFWithFlags(music, &fsRef, 
+									  kMusicSequenceLoadSMF_ChannelsToTracks);
 
-	size_t countIn = 0;
-	if (playElements & kVLPlayCountIn) 
-		switch ([[self songTime] intValue]) {
-		case 0x404:
-		case 0x304:
-		case 0x608:
-			countIn = 2;
-		}
-	VLMIDIWriter annotate(music, countIn);
-	annotate.Visit(*song);
+		size_t countIn = 0;
+		if (playElements & kVLPlayCountIn) 
+			switch ([[self songTime] intValue]) {
+			case 0x404:
+			case 0x304:
+			case 0x608:
+				countIn = 2;
+			}
+		VLMIDIWriter annotate(music, countIn);
+		annotate.Visit(*song);
 	
-	[sheetWin willPlaySequence:music];
-	VLSoundOut::Instance()->PlaySequence(music);
+		hasMusicSequence = true;
+		[sheetWin willPlaySequence:music];
+		VLSoundOut::Instance()->PlaySequence(music);
+	}
 }
 
 - (void) playWithGroove:(NSString *)groove inSections:(NSRange)sections
diff --git a/Sources/VLSoundOut.cpp b/Sources/VLSoundOut.cpp
index e0d43c1..ef0052c 100644
--- a/Sources/VLSoundOut.cpp
+++ b/Sources/VLSoundOut.cpp
@@ -27,7 +27,7 @@ public:
 	virtual void 	PlayNote(const VLNote & note);
 	virtual void 	PlayChord(const VLChord & chord); 
 	virtual void   	PlaySequence(MusicSequence music);
-	virtual void	Stop();
+	virtual void	Stop(bool pause);
 	virtual bool	Playing();
 	virtual void 	SetPlayRate(float rate);
 	virtual void 	SetTime(MusicTimeStamp time);
@@ -125,7 +125,7 @@ VLAUSoundOut::VLAUSoundOut(bool)
 VLAUSoundOut::~VLAUSoundOut()
 {
 	DisposeMusicPlayer(fPlayer);
-	Stop();
+	Stop(false);
 	DisposeAUGraph(fGraph);
 }
 
@@ -189,13 +189,15 @@ void VLAUSoundOut::SetupOutput(AUNode)
 
 void VLAUSoundOut::PlaySequence(MusicSequence music)
 {
-	Stop();
+	if (music) {
+		Stop(false);
+	
+		fMusic			= music;
+		fMusicLength	= SequenceLength(music);
 
-	fMusic			= music;
-	fMusicLength	= SequenceLength(music);
-
-	R(MusicSequenceSetAUGraph(fMusic, fGraph));
-	R(MusicPlayerSetSequence(fPlayer, fMusic));
+		R(MusicSequenceSetAUGraph(fMusic, fGraph));
+		R(MusicPlayerSetSequence(fPlayer, fMusic));
+	}
 	R(MusicPlayerStart(fPlayer));
 
 	fRunning	= true;
@@ -220,16 +222,14 @@ void VLAUSoundOut::SetTime(MusicTimeStamp time)
 	MusicPlayerSetTime(fPlayer, time);
 }
 
-void VLAUSoundOut::Stop()
+void VLAUSoundOut::Stop(bool pause)
 {
 	MusicPlayerStop(fPlayer);
-	if (fRunning) {
-		fRunning	= false;
-		if (fMusic) {
-			MusicPlayerSetSequence(fPlayer, NULL);
-			DisposeMusicSequence(fMusic);
-			fMusic = 0;
-		}
+	fRunning	= false;
+	if (!pause && fMusic) {
+		MusicPlayerSetSequence(fPlayer, NULL);
+		DisposeMusicSequence(fMusic);
+		fMusic = 0;
 	}
 }
 
diff --git a/Sources/VLSoundOut.h b/Sources/VLSoundOut.h
index 02039ce..88571e2 100644
--- a/Sources/VLSoundOut.h
+++ b/Sources/VLSoundOut.h
@@ -39,7 +39,7 @@ public:
 	virtual void PlayChord(const VLChord & chord) = 0; 
 	void		 PlayFile(CFDataRef file);
 	virtual void PlaySequence(MusicSequence music) = 0;
-	virtual void Stop() = 0;
+	virtual void Stop(bool pause=true) = 0;
 	virtual bool Playing() = 0;
 	virtual void SetPlayRate(float rate) = 0;
 	virtual void SetTime(MusicTimeStamp time) = 0;