diff --git a/src/engine/platform/c64.cpp b/src/engine/platform/c64.cpp
index 5d1eb53cc..ad1113470 100644
--- a/src/engine/platform/c64.cpp
+++ b/src/engine/platform/c64.cpp
@@ -68,10 +68,16 @@ void DivPlatformC64::acquire(short* bufL, short* bufR, size_t start, size_t len)
   for (size_t i=start; i<start+len; i++) {
     if (isFP) {
       sid_fp.clock(4,&bufL[i]);
+      if (++writeOscBuf>=4) {
+        writeOscBuf=0;
+        oscBuf[0]->data[oscBuf[0]->needle++]=(sid_fp.lastChanOut[0]-dcOff)>>5;
+        oscBuf[1]->data[oscBuf[1]->needle++]=(sid_fp.lastChanOut[1]-dcOff)>>5;
+        oscBuf[2]->data[oscBuf[2]->needle++]=(sid_fp.lastChanOut[2]-dcOff)>>5;
+      }
     } else {
       sid.clock();
       bufL[i]=sid.output();
-      if (++writeOscBuf>=8) {
+      if (++writeOscBuf>=16) {
         writeOscBuf=0;
         oscBuf[0]->data[oscBuf[0]->needle++]=(sid.last_chan_out[0]-dcOff)>>5;
         oscBuf[1]->data[oscBuf[1]->needle++]=(sid.last_chan_out[1]-dcOff)>>5;
diff --git a/src/engine/platform/sound/c64_fp/SID.h b/src/engine/platform/sound/c64_fp/SID.h
index 05ad83c3b..85b6a4e4d 100644
--- a/src/engine/platform/sound/c64_fp/SID.h
+++ b/src/engine/platform/sound/c64_fp/SID.h
@@ -132,7 +132,7 @@ private:
      *
      * @return the output sample
      */
-    int output() const;
+    int output();
 
     /**
      * Calculate the numebr of cycles according to current parameters
@@ -146,6 +146,8 @@ public:
     SID();
     ~SID();
 
+    int lastChanOut[3];
+
     /**
      * Set chip model.
      *
@@ -312,12 +314,16 @@ void SID::ageBusValue(unsigned int n)
 }
 
 RESID_INLINE
-int SID::output() const
+int SID::output()
 {
     const int v1 = voice[0]->output(voice[2]->wave());
     const int v2 = voice[1]->output(voice[0]->wave());
     const int v3 = voice[2]->output(voice[1]->wave());
 
+    lastChanOut[0]=v1;
+    lastChanOut[1]=v2;
+    lastChanOut[2]=v3;
+
     return externalFilter->clock(filter->clock(v1, v2, v3));
 }