diff --git a/apu/apu.cpp b/apu/apu.cpp
index 9ae79296..355454d8 100644
--- a/apu/apu.cpp
+++ b/apu/apu.cpp
@@ -383,7 +383,13 @@ void S9xFinalizeSamples (void)
 {
 	if (!Settings.Mute)
 	{
-		if (!spc::resampler->push((short *) spc::landing_buffer, SNES::dsp.spc_dsp.sample_count ()))
+		if (Settings.MSU1)
+		{
+			S9xMSU1Generate(SNES::dsp.spc_dsp.sample_count());
+			msu::resampler->push((short *)msu::landing_buffer, S9xMSU1Samples());
+		}
+
+		if (!spc::resampler->push((short *)spc::landing_buffer, SNES::dsp.spc_dsp.sample_count()))
 		{
 			/* We weren't able to process the entire buffer. Potential overrun. */
 			spc::sound_in_sync = FALSE;
@@ -391,20 +397,9 @@ void S9xFinalizeSamples (void)
 			if (Settings.SoundSync && !Settings.TurboMode)
 				return;
 		}
-
-		if (Settings.MSU1)
-		{
-			S9xMSU1Execute();
-			if (!msu::resampler->push((short *)msu::landing_buffer, S9xMSU1Samples()))
-			{
-				spc::sound_in_sync = FALSE;
-
-				if (Settings.SoundSync && !Settings.TurboMode)
-					return;
-			}
-		}
 	}
 
+
 	if (!Settings.SoundSync || Settings.TurboMode || Settings.Mute)
 		spc::sound_in_sync = TRUE;
 	else
diff --git a/msu1.cpp b/msu1.cpp
index 796a6d4b..78c92c79 100644
--- a/msu1.cpp
+++ b/msu1.cpp
@@ -199,6 +199,7 @@ std::ifstream dataFile, audioFile;
 uint32 dataPos, audioPos, audioResumePos, audioLoopPos;
 uint16 audioTrack, audioResumeTrack;
 char fName[64];
+uint32 partial_samples;
 
 // Sample buffer
 int16 *bufPos, *bufBegin, *bufEnd;
@@ -222,6 +223,8 @@ void S9xMSU1Init(void)
 	bufBegin			= 0;
 	bufEnd				= 0;
 
+	partial_samples = 0;
+
 	if (dataFile.is_open())
 		dataFile.close();
 
@@ -231,9 +234,11 @@ void S9xMSU1Init(void)
 	dataFile.open(S9xGetFilename(".msu", ROMFILENAME_DIR), std::ios::in | std::ios::binary);
 }
 
-void S9xMSU1Execute(void)
+void S9xMSU1Generate(int sample_count)
 {
-	while (((uintptr_t)bufPos < (uintptr_t)bufEnd) && (MSU1.MSU1_STATUS & AudioPlaying))
+	partial_samples += 441000 * sample_count;
+
+	while (((uintptr_t)bufPos < (uintptr_t)bufEnd) && (MSU1.MSU1_STATUS & AudioPlaying) && partial_samples > 320405)
 	{
 		if (audioFile.is_open())
 		{
@@ -258,8 +263,8 @@ void S9xMSU1Execute(void)
 			sample = (double)sample * (double)MSU1.MSU1_VOLUME / 255.0;
 
 			*(bufPos++) = sample;
-
 			audioPos += 2;
+			partial_samples -= 320405;
 		}
 		else
 		{
diff --git a/msu1.h b/msu1.h
index acfde1c9..ddf0728a 100644
--- a/msu1.h
+++ b/msu1.h
@@ -216,7 +216,7 @@ enum SMSU1_FLAG : uint8 {
 extern struct SMSU1	MSU1;
 
 void S9xMSU1Init(void);
-void S9xMSU1Execute(void);
+void S9xMSU1Generate(int sample_count);
 uint8 S9xMSU1ReadPort(int port);
 void S9xMSU1WritePort(int port, uint8 byte);
 uint16 S9xMSU1Samples(void);