diff --git a/src/engine/platform/genesisext.cpp b/src/engine/platform/genesisext.cpp
index a147545c..75606f00 100644
--- a/src/engine/platform/genesisext.cpp
+++ b/src/engine/platform/genesisext.cpp
@@ -732,10 +732,8 @@ void DivPlatformGenesisExt::forceIns() {
       if (i==2 && extMode) { // extended channel
         if (isOpMuted[orderedOps[j]] || !op.enable) {
           rWrite(baseAddr+0x40,127);
-        } else if (KVS(i,j)) {
-          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         } else {
-          rWrite(baseAddr+0x40,op.tl);
+          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         }
       } else {
         if (isMuted[i]) {
diff --git a/src/engine/platform/ym2203ext.cpp b/src/engine/platform/ym2203ext.cpp
index 349c8a82..adb312ad 100644
--- a/src/engine/platform/ym2203ext.cpp
+++ b/src/engine/platform/ym2203ext.cpp
@@ -627,10 +627,8 @@ void DivPlatformYM2203Ext::forceIns() {
       if (i==2 && extMode) { // extended channel
         if (isOpMuted[orderedOps[j]] || !op.enable) {
           rWrite(baseAddr+0x40,127);
-        } else if (KVS(i,j)) {
-          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         } else {
-          rWrite(baseAddr+0x40,op.tl);
+          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         }
       } else {
         if (isMuted[i]) {
diff --git a/src/engine/platform/ym2608ext.cpp b/src/engine/platform/ym2608ext.cpp
index 10225613..50424d4e 100644
--- a/src/engine/platform/ym2608ext.cpp
+++ b/src/engine/platform/ym2608ext.cpp
@@ -676,10 +676,8 @@ void DivPlatformYM2608Ext::forceIns() {
       if (i==2 && extMode) { // extended channel
         if (isOpMuted[orderedOps[j]] || !op.enable) {
           rWrite(baseAddr+0x40,127);
-        } else if (KVS(i,j)) {
-          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         } else {
-          rWrite(baseAddr+0x40,op.tl);
+          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         }
       } else {
         if (isMuted[i] || !op.enable) {
diff --git a/src/engine/platform/ym2610bext.cpp b/src/engine/platform/ym2610bext.cpp
index 74d98aaf..545a80e9 100644
--- a/src/engine/platform/ym2610bext.cpp
+++ b/src/engine/platform/ym2610bext.cpp
@@ -671,10 +671,8 @@ void DivPlatformYM2610BExt::forceIns() {
       if (i==extChanOffs && extMode) { // extended channel
         if (isOpMuted[orderedOps[j]] || !op.enable) {
           rWrite(baseAddr+0x40,127);
-        } else if (KVS(i,j)) {
-          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         } else {
-          rWrite(baseAddr+0x40,op.tl);
+          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         }
       } else {
         if (isMuted[i] || !op.enable) {
diff --git a/src/engine/platform/ym2610ext.cpp b/src/engine/platform/ym2610ext.cpp
index f0ab4699..39e34167 100644
--- a/src/engine/platform/ym2610ext.cpp
+++ b/src/engine/platform/ym2610ext.cpp
@@ -671,10 +671,8 @@ void DivPlatformYM2610Ext::forceIns() {
       if (i==extChanOffs && extMode) { // extended channel
         if (isOpMuted[orderedOps[j]] || !op.enable) {
           rWrite(baseAddr+0x40,127);
-        } else if (KVS(i,j)) {
-          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         } else {
-          rWrite(baseAddr+0x40,op.tl);
+          rWrite(baseAddr+0x40,127-VOL_SCALE_LOG_BROKEN(127-op.tl,opChan[orderedOps[j]].outVol&0x7f,127));
         }
       } else {
         if (isMuted[i] || !op.enable) {