diff --git a/apu/apu.cpp b/apu/apu.cpp
index 8072c19e..d9c214b9 100644
--- a/apu/apu.cpp
+++ b/apu/apu.cpp
@@ -560,6 +560,7 @@ void S9xAPUExecute (void)
 void S9xAPUEndScanline (void)
 {
 	S9xAPUExecute();
+	SNES::dsp.synchronize();
 
 	if (SNES::dsp.spc_dsp.sample_count() >= APU_MINIMUM_SAMPLE_BLOCK || !spc::sound_in_sync)
 		S9xLandSamples();
diff --git a/apu/bapu/dsp/sdsp.hpp b/apu/bapu/dsp/sdsp.hpp
index 83d51eb5..baf1e88b 100644
--- a/apu/bapu/dsp/sdsp.hpp
+++ b/apu/bapu/dsp/sdsp.hpp
@@ -1,12 +1,22 @@
 #include "SPC_DSP.h"
+#include <stdio.h>
 
 class DSP : public Processor {
 public:
   inline uint8 read(uint8 addr) {
+    synchronize ();
     return spc_dsp.read(addr);
   }
 
+  inline void synchronize (void) {
+    if (clock) {
+      spc_dsp.run (clock);
+      clock = 0;
+    }
+  }
+
   inline void write(uint8 addr, uint8 data) {
+    synchronize ();
     spc_dsp.write(addr, data);
   }
 
diff --git a/apu/bapu/smp/core.cpp b/apu/bapu/smp/core.cpp
index df4076c1..b5266cec 100644
--- a/apu/bapu/smp/core.cpp
+++ b/apu/bapu/smp/core.cpp
@@ -9,7 +9,7 @@ void SMP::tick() {
   synchronize_dsp();
 #else
   clock++;
-  dsp.spc_dsp.run(1);
+  dsp.clock++;
 #endif
 }
 
@@ -82,7 +82,7 @@ void SMP::op_step() {
   synchronize_dsp();
 #else
   clock += cycle_count_table[opcode];
-  dsp.spc_dsp.run(cycle_count_table[opcode]);
+  dsp.clock += cycle_count_table[opcode];
 #endif