diff --git a/src/engine/platform/c140.cpp b/src/engine/platform/c140.cpp
index 5330443ac..95b9dc021 100644
--- a/src/engine/platform/c140.cpp
+++ b/src/engine/platform/c140.cpp
@@ -80,9 +80,8 @@ void DivPlatformC140::tick(bool sysTick) {
     chan[i].std.next();
     if (chan[i].std.vol.had) {
       chan[i].outVol=(chan[i].vol*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/chan[i].macroVolMul;
-      if (!isMuted[i]) {
-        chan[i].volumeChanged.changed=0xff;
-      }
+      chan[i].volChangedL=true;
+      chan[i].volChangedR=true;
     }
     if (NEW_ARP_STRAT) {
       chan[i].handleArp();
@@ -103,16 +102,12 @@ void DivPlatformC140::tick(bool sysTick) {
     }
     if (chan[i].std.panL.had) {
       chan[i].chPanL=chan[i].std.panL.val&255;
-      if (!isMuted[i]) {
-        chan[i].volumeChanged.left=1;
-      }
+      chan[i].volChangedL=true;
     }
 
     if (chan[i].std.panR.had) {
       chan[i].chPanR=chan[i].std.panR.val&255;
-      if (!isMuted[i]) {
-        chan[i].volumeChanged.right=1;
-      }
+      chan[i].volChangedR=true;
     }
     
     if (chan[i].std.phaseReset.had) {
@@ -121,24 +116,15 @@ void DivPlatformC140::tick(bool sysTick) {
         chan[i].setPos=true;
       }
     }
-    if (chan[i].volumeChanged.changed) {
-      if (chan[i].volumeChanged.left) {
-        if (isMuted[i]) {
-          chan[i].chVolL=0;
-        } else {
-          chan[i].chVolL=(chan[i].outVol*chan[i].chPanL)/255;
-        }
-        rWrite(1+(i<<4),chan[i].chVolL);
-      }
-      if (chan[i].volumeChanged.right) {
-        if (isMuted[i]) {
-          chan[i].chVolR=0;
-        } else {
-          chan[i].chVolR=(chan[i].outVol*chan[i].chPanR)/255;
-        }
-        rWrite(0+(i<<4),chan[i].chVolR);
-      }
-      chan[i].volumeChanged.changed=0;
+    if (chan[i].volChangedL) {
+      chan[i].chVolL=(chan[i].outVol*chan[i].chPanL)/255;
+      rWrite(1+(i<<4),chan[i].chVolL);
+      chan[i].volChangedL=false;
+    }
+    if (chan[i].volChangedR) {
+      chan[i].chVolR=(chan[i].outVol*chan[i].chPanR)/255;
+      rWrite(0+(i<<4),chan[i].chVolR);
+      chan[i].volChangedR=false;
     }
     if (chan[i].setPos) {
       // force keyon
@@ -178,9 +164,8 @@ void DivPlatformC140::tick(bool sysTick) {
         rWrite(0x0b+(i<<4),loop&0xff);
         if (!chan[i].std.vol.had) {
           chan[i].outVol=chan[i].vol;
-          if (!isMuted[i]) {
-            chan[i].volumeChanged.changed=0xff;
-          }
+          chan[i].volChangedL=true;
+          chan[i].volChangedR=true;
         }
         chan[i].keyOn=false;
       }
@@ -221,9 +206,8 @@ int DivPlatformC140::dispatch(DivCommand c) {
       chan[c.chan].macroInit(ins);
       if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
         chan[c.chan].outVol=chan[c.chan].vol;
-        if (!isMuted[c.chan]) {
-          chan[c.chan].volumeChanged.changed=0xff;
-        }
+        chan[c.chan].volChangedL=true;
+        chan[c.chan].volChangedR=true;
       }
       break;
     }
@@ -247,9 +231,8 @@ int DivPlatformC140::dispatch(DivCommand c) {
       if (!chan[c.chan].std.vol.has) {
         chan[c.chan].outVol=c.value;
       }
-      if (!isMuted[c.chan]) {
-        chan[c.chan].volumeChanged.changed=0xff;
-      }
+      chan[c.chan].volChangedL=true;
+      chan[c.chan].volChangedR=true;
       break;
     case DIV_CMD_GET_VOLUME:
       if (chan[c.chan].std.vol.has) {
@@ -260,9 +243,8 @@ int DivPlatformC140::dispatch(DivCommand c) {
     case DIV_CMD_PANNING:
       chan[c.chan].chPanL=c.value;
       chan[c.chan].chPanR=c.value2;
-      if (!isMuted[c.chan]) {
-        chan[c.chan].volumeChanged.changed=0xff;
-      }
+      chan[c.chan].volChangedL=true;
+      chan[c.chan].volChangedR=true;
       break;
     case DIV_CMD_PITCH:
       chan[c.chan].pitch=c.value;
@@ -328,14 +310,15 @@ int DivPlatformC140::dispatch(DivCommand c) {
 
 void DivPlatformC140::muteChannel(int ch, bool mute) {
   isMuted[ch]=mute;
-  chan[ch].volumeChanged.changed=0xff;
+  c140.voice[ch].muted=mute;
 }
 
 void DivPlatformC140::forceIns() {
   for (int i=0; i<24; i++) {
     chan[i].insChanged=true;
     chan[i].freqChanged=true;
-    chan[i].volumeChanged.changed=0xff;
+    chan[i].volChangedL=true;
+    chan[i].volChangedR=true;
     chan[i].sample=-1;
   }
 }
@@ -480,7 +463,7 @@ int DivPlatformC140::init(DivEngine* p, int channels, int sugRate, const DivConf
     isMuted[i]=false;
     oscBuf[i]=new DivDispatchOscBuffer;
   }
-  sampleMem=new signed short[getSampleMemCapacity()/sizeof(short)];
+  sampleMem=new short[getSampleMemCapacity()>>1];
   sampleMemLen=0;
   c140_init(&c140);
   c140.sample_mem=sampleMem;
diff --git a/src/engine/platform/c140.h b/src/engine/platform/c140.h
index 5604a794e..fa221eec2 100644
--- a/src/engine/platform/c140.h
+++ b/src/engine/platform/c140.h
@@ -26,33 +26,20 @@
 
 class DivPlatformC140: public DivDispatch {
   struct Channel: public SharedChannel<int> {
-    struct VolumeUpdate {
-      union { // pack flag bits in single byte
-        struct { // flag bits
-          unsigned char left : 1;  // left volume
-          unsigned char right : 1; // right volume
-          unsigned char reserved : 6;
-        };
-        unsigned char changed = 0; // Packed flags are stored here
-      };
-
-      VolumeUpdate():
-        changed(0) {}
-    } volumeChanged;
-
     unsigned int audPos;
     int sample, wave;
-    bool setPos;
+    bool setPos, volChangedL, volChangedR;
     int chPanL, chPanR;
     int chVolL, chVolR;
     int macroVolMul;
     Channel():
       SharedChannel<int>(255),
-      volumeChanged(VolumeUpdate()),
       audPos(0),
       sample(-1),
       wave(-1),
       setPos(false),
+      volChangedL(false),
+      volChangedR(false),
       chPanL(255),
       chPanR(255),
       chVolL(255),
diff --git a/src/engine/platform/sound/c140.c b/src/engine/platform/sound/c140.c
index 948b2f074..d22677b24 100644
--- a/src/engine/platform/sound/c140.c
+++ b/src/engine/platform/sound/c140.c
@@ -52,8 +52,10 @@ void c140_tick(struct c140_t *c140, const int cycle)
 	for (int i = 0; i < 24; i++)
 	{
 		c140_voice_tick(c140, i, cycle);
-		c140->lout += c140->voice[i].lout;
-		c140->rout += c140->voice[i].rout;
+		if (!c140->voice[i].muted) {
+			c140->lout += c140->voice[i].lout;
+			c140->rout += c140->voice[i].rout;
+		}
 	}
 	// scale as 16bit
 	c140->lout >>= 10;
@@ -131,6 +133,10 @@ void c140_init(struct c140_t *c140)
 										<< (exponent ? exponent - 1 : 0));
 		}
 	}
+	for (int i = 0; i < 24; i++)
+	{
+		c140->voice[i].muted = false;
+	}
 }
 
 void c140_reset(struct c140_t *c140)
@@ -186,4 +192,4 @@ void c140_write(struct c140_t *c140, const unsigned short addr, const unsigned c
 		}
 	}
 	// Timer
-}
\ No newline at end of file
+}
diff --git a/src/engine/platform/sound/c140.h b/src/engine/platform/sound/c140.h
index defe3f87d..6fe2c4930 100644
--- a/src/engine/platform/sound/c140.h
+++ b/src/engine/platform/sound/c140.h
@@ -2,9 +2,13 @@
 
 ============================================================================
 
-Namco C140 sound emulator
+MODIFIED Namco C140 sound emulator - MODIFIED VERSION
 by cam900
 
+MODIFICATION by tildearrow - adds muting function
+THIS IS NOT THE ORIGINAL VERSION - you can find the original one in
+commit 72d04777c013988ed8cf6da27c62a9d784a59dff
+
 This file is licensed under zlib license.
 
 ============================================================================
@@ -49,6 +53,7 @@ extern "C"
 
 struct c140_voice_t
 {
+   bool muted;                // muted - can be set by user
    bool busy;                 // busy flag
    bool keyon;                // key on flag
    unsigned short freq;       // sample frequency
diff --git a/src/gui/debug.cpp b/src/gui/debug.cpp
index a2089f47f..6e4a091da 100644
--- a/src/gui/debug.cpp
+++ b/src/gui/debug.cpp
@@ -1106,8 +1106,6 @@ void putDispatchChan(void* data, int chanNum, int type) {
       ImGui::Text("- chVolR: %.2x",ch->chVolR);
       ImGui::Text("- macroVolMul: %.2x",ch->macroVolMul);
       COMMON_CHAN_DEBUG_BOOL;
-      ImGui::TextColored(ch->volumeChanged.left?colorOn:colorOff,">> VolumeChangedLeft");
-      ImGui::TextColored(ch->volumeChanged.right?colorOn:colorOff,">> VolumeChangedRight");
       ImGui::TextColored(ch->setPos?colorOn:colorOff,">> SetPos");
       break;
     }