diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index db4af899..88876412 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -226,6 +226,20 @@ const char* chanShortNames[11][17]={
   {"F1", "O1", "O2", "O3", "O4", "F3", "F4", "S1", "S2", "S3", "P1", "P2", "P3", "P4", "P5", "P6"}, // YM2610 (extended channel 2)
 };
 
+const int chanTypes[11][17]={
+  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4}, // YMU759
+  {0, 0, 0, 0, 0, 0, 1, 1, 1, 2}, // Genesis
+  {0, 0, 5, 5, 5, 5, 0, 0, 0, 1, 1, 1, 2}, // Genesis (extended channel 3)
+  {1, 1, 1, 2}, // SMS
+  {1, 1, 3, 2}, // GB
+  {3, 3, 3, 3, 3, 3}, // PCE
+  {1, 1, 3, 2, 4}, // NES
+  {2, 2, 2}, // C64
+  {0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 4, 4, 4}, // Arcade
+  {0, 0, 0, 0, 1, 1, 1, 4, 4, 4, 4, 4, 4}, // YM2610
+  {0, 5, 5, 5, 5, 0, 0, 1, 1, 1, 4, 4, 4, 4, 4, 4}, // YM2610 (extended channel 2)
+};
+
 const char* DivEngine::getChannelName(int chan) {
   switch (song.system) {
     case DIV_SYSTEM_NULL: case DIV_SYSTEM_YMU759:
@@ -304,6 +318,45 @@ const char* DivEngine::getChannelShortName(int chan) {
   return "??";
 }
 
+int DivEngine::getChannelType(int chan) {
+  switch (song.system) {
+    case DIV_SYSTEM_NULL: case DIV_SYSTEM_YMU759:
+      return chanTypes[0][chan];
+      break;
+    case DIV_SYSTEM_GENESIS:
+      return chanTypes[1][chan];
+      break;
+    case DIV_SYSTEM_GENESIS_EXT:
+      return chanTypes[2][chan];
+      break;
+    case DIV_SYSTEM_SMS:
+      return chanTypes[3][chan];
+      break;
+    case DIV_SYSTEM_GB:
+      return chanTypes[4][chan];
+      break;
+    case DIV_SYSTEM_PCE:
+      return chanTypes[5][chan];
+      break;
+    case DIV_SYSTEM_NES:
+      return chanTypes[6][chan];
+      break;
+    case DIV_SYSTEM_C64_6581: case DIV_SYSTEM_C64_8580:
+      return chanTypes[7][chan];
+      break;
+    case DIV_SYSTEM_ARCADE:
+      return chanTypes[8][chan];
+      break;
+    case DIV_SYSTEM_YM2610:
+      return chanTypes[9][chan];
+      break;
+    case DIV_SYSTEM_YM2610_EXT:
+      return chanTypes[10][chan];
+      break;
+  }
+  return 1;
+}
+
 int DivEngine::getMaxVolume() {
   switch (song.system) {
     case DIV_SYSTEM_PCE:
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 51f87605..a55791c3 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -173,6 +173,15 @@ class DivEngine {
     // get sys channel count
     int getChannelCount(DivSystem sys);
 
+    // get channel type
+    // - 0: FM
+    // - 1: pulse
+    // - 2: noise
+    // - 3: wave/other
+    // - 4: PCM
+    // - 5: FM operator
+    int getChannelType(int ch);
+
     // get sys name
     const char* getSystemName(DivSystem sys);
 
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 09d9655f..8b2fd588 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -1023,9 +1023,22 @@ void FurnaceGUI::drawPattern() {
       for (int i=0; i<chans; i++) {
         ImGui::TableNextColumn();
         snprintf(chanID,256," %s##_CH%d",e->getChannelName(i),i);
-        if (ImGui::Selectable(chanID,!e->isChannelMuted(i),ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale))) {
+        bool muted=e->isChannelMuted(i);
+        ImVec4 chanHead=muted?uiColors[GUI_COLOR_CHANNEL_MUTED]:uiColors[GUI_COLOR_CHANNEL_FM+e->getChannelType(i)];
+        ImVec4 chanHeadActive=chanHead;
+        ImVec4 chanHeadHover=chanHead;
+        chanHead.x*=0.25; chanHead.y*=0.25; chanHead.z*=0.25;
+        chanHeadActive.x*=0.8; chanHeadActive.y*=0.8; chanHeadActive.z*=0.8;
+        chanHeadHover.x*=0.4; chanHeadHover.y*=0.4; chanHeadHover.z*=0.4;
+        ImGui::PushStyleColor(ImGuiCol_Header,chanHead);
+        ImGui::PushStyleColor(ImGuiCol_HeaderActive,chanHeadActive);
+        ImGui::PushStyleColor(ImGuiCol_HeaderHovered,chanHeadHover);
+        if (muted) ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_CHANNEL_MUTED]);
+        if (ImGui::Selectable(chanID,!muted,ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale))) {
           e->toggleMute(i);
         }
+        if (muted) ImGui::PopStyleColor();
+        ImGui::PopStyleColor(3);
         if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
           e->toggleSolo(i);
         }
@@ -2471,10 +2484,12 @@ FurnaceGUI::FurnaceGUI():
   uiColors[GUI_COLOR_BACKGROUND]=ImVec4(0.1f,0.1f,0.1f,1.0f);
   uiColors[GUI_COLOR_FRAME_BACKGROUND]=ImVec4(0.0f,0.0f,0.0f,0.85f);
   uiColors[GUI_COLOR_CHANNEL_FM]=ImVec4(0.2f,0.8f,1.0f,1.0f);
-  uiColors[GUI_COLOR_CHANNEL_PULSE]=ImVec4(0.3f,1.0f,0.2f,1.0f);
+  uiColors[GUI_COLOR_CHANNEL_PULSE]=ImVec4(0.4f,1.0f,0.2f,1.0f);
   uiColors[GUI_COLOR_CHANNEL_NOISE]=ImVec4(0.8f,0.8f,0.8f,1.0f);
   uiColors[GUI_COLOR_CHANNEL_PCM]=ImVec4(1.0f,0.9f,0.2f,1.0f);
   uiColors[GUI_COLOR_CHANNEL_WAVE]=ImVec4(1.0f,0.5f,0.2f,1.0f);
+  uiColors[GUI_COLOR_CHANNEL_OP]=ImVec4(0.2f,0.4f,1.0f,1.0f);
+  uiColors[GUI_COLOR_CHANNEL_MUTED]=ImVec4(0.5f,0.5f,0.5f,1.0f);
   uiColors[GUI_COLOR_PATTERN_CURSOR]=ImVec4(0.1f,0.3f,0.5f,1.0f);
   uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]=ImVec4(0.2f,0.4f,0.6f,1.0f);
   uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]=ImVec4(0.2f,0.5f,0.7f,1.0f);
diff --git a/src/gui/gui.h b/src/gui/gui.h
index aff188b5..8a82517a 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -16,6 +16,8 @@ enum FurnaceGUIColors {
   GUI_COLOR_CHANNEL_NOISE,
   GUI_COLOR_CHANNEL_WAVE,
   GUI_COLOR_CHANNEL_PCM,
+  GUI_COLOR_CHANNEL_OP,
+  GUI_COLOR_CHANNEL_MUTED,
   GUI_COLOR_PATTERN_CURSOR,
   GUI_COLOR_PATTERN_CURSOR_HOVER,
   GUI_COLOR_PATTERN_CURSOR_ACTIVE,