diff --git a/TODO.md b/TODO.md
index 859ad68c..a0da2bbd 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,6 +2,6 @@
 
 - stereo separation control for AY
 - "paste with instrument"
-- FM operator muting
-- FM operator swap
+- channel appearance settings
+- auto-detect system
 - bug fixes
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 06fc65f0..40869c42 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -584,6 +584,38 @@ void FurnaceGUI::updateWindowTitle() {
   if (sdlWin!=NULL) SDL_SetWindowTitle(sdlWin,title.c_str());
 }
 
+ImVec4 FurnaceGUI::channelColor(int ch) {
+  switch (settings.channelColors) {
+    case 0:
+      return uiColors[GUI_COLOR_CHANNEL_BG];
+      break;
+    case 1:
+      return uiColors[GUI_COLOR_CHANNEL_FM+e->getChannelType(ch)];
+      break;
+    case 2:
+      return uiColors[GUI_COLOR_INSTR_STD+e->getPreferInsType(ch)];
+      break;
+  }
+  // invalid
+  return uiColors[GUI_COLOR_TEXT];
+}
+
+ImVec4 FurnaceGUI::channelTextColor(int ch) {
+  switch (settings.channelTextColors) {
+    case 0:
+      return uiColors[GUI_COLOR_CHANNEL_FG];
+      break;
+    case 1:
+      return uiColors[GUI_COLOR_CHANNEL_FM+e->getChannelType(ch)];
+      break;
+    case 2:
+      return uiColors[GUI_COLOR_INSTR_STD+e->getPreferInsType(ch)];
+      break;
+  }
+  // invalid
+  return uiColors[GUI_COLOR_TEXT];
+}
+
 const char* defaultLayout="[Window][DockSpaceViewport_11111111]\n\
 Pos=0,24\n\
 Size=1280,731\n\
diff --git a/src/gui/gui.h b/src/gui/gui.h
index 6499c4d1..b9784f3f 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -161,6 +161,8 @@ enum FurnaceGUIColors {
   GUI_COLOR_INSTR_OPL_DRUMS,
   GUI_COLOR_INSTR_UNKNOWN,
 
+  GUI_COLOR_CHANNEL_BG,
+  GUI_COLOR_CHANNEL_FG,
   GUI_COLOR_CHANNEL_FM,
   GUI_COLOR_CHANNEL_PULSE,
   GUI_COLOR_CHANNEL_NOISE,
@@ -1604,6 +1606,8 @@ class FurnaceGUI {
 
   void updateWindowTitle();
   void prepareLayout();
+  ImVec4 channelColor(int ch);
+  ImVec4 channelTextColor(int ch);
 
   void readOsc();
 
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index e79de410..7c987358 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -774,6 +774,8 @@ const FurnaceGUIColorDef guiColors[GUI_COLOR_MAX]={
   D(GUI_COLOR_INSTR_OPL_DRUMS,"",ImVec4(0.3f,1.0f,0.9f,1.0f)),
   D(GUI_COLOR_INSTR_UNKNOWN,"",ImVec4(0.3f,0.3f,0.3f,1.0f)),
 
+  D(GUI_COLOR_CHANNEL_BG,"",ImVec4(0.4f,0.6f,0.8f,1.0f)),
+  D(GUI_COLOR_CHANNEL_FG,"",ImVec4(1.0f,1.0f,1.0f,1.0f)),
   D(GUI_COLOR_CHANNEL_FM,"",ImVec4(0.2f,0.8f,1.0f,1.0f)),
   D(GUI_COLOR_CHANNEL_PULSE,"",ImVec4(0.4f,1.0f,0.2f,1.0f)),
   D(GUI_COLOR_CHANNEL_NOISE,"",ImVec4(0.8f,0.8f,0.8f,1.0f)),
diff --git a/src/gui/pattern.cpp b/src/gui/pattern.cpp
index ec65101d..e6bbc72f 100644
--- a/src/gui/pattern.cpp
+++ b/src/gui/pattern.cpp
@@ -468,20 +468,44 @@ void FurnaceGUI::drawPattern() {
             snprintf(chanID,2048," %s##_CH%d",chName,i);
           }
         }
+
         bool muted=e->isChannelMuted(i);
-        ImVec4 chanHead=muted?uiColors[GUI_COLOR_CHANNEL_MUTED]:uiColors[GUI_COLOR_CHANNEL_FM+e->getChannelType(i)];
+        ImVec4 chanHead=muted?uiColors[GUI_COLOR_CHANNEL_MUTED]:channelColor(i);
         ImVec4 chanHeadActive=chanHead;
         ImVec4 chanHeadHover=chanHead;
+
         if (e->keyHit[i]) {
-          keyHit[i]=0.2;
-          if (!muted) {
-            int note=e->getChanState(i)->note+60;
-            if (note>=0 && note<180) {
-              pianoKeyHit[note]=1.0;
+          if (settings.channelFeedbackStyle==1) {
+            keyHit[i]=0.2;
+            if (!muted) {
+              int note=e->getChanState(i)->note+60;
+              if (note>=0 && note<180) {
+                pianoKeyHit[note]=1.0;
+              }
             }
           }
           e->keyHit[i]=false;
         }
+        if (settings.channelFeedbackStyle==2 && e->isRunning()) {
+          float amount=((float)(e->getChanState(i)->volume>>8)/(float)e->getMaxVolumeChan(i));
+          if (!e->getChanState(i)->keyOn) amount=0.0f;
+          keyHit[i]=amount*0.2f;
+          if (!muted) {
+            int note=e->getChanState(i)->note+60;
+            if (note>=0 && note<180) {
+              pianoKeyHit[note]=amount;
+            }
+          }
+        } else if (settings.channelFeedbackStyle==3 && e->isRunning()) {
+          bool active=e->getChanState(i)->keyOn;
+          keyHit[i]=active?0.2f:0.0f;
+          if (!muted) {
+            int note=e->getChanState(i)->note+60;
+            if (note>=0 && note<180) {
+              pianoKeyHit[note]=active?1.0f:0.0f;
+            }
+          }
+        }
         if (settings.guiColorsBase) {
           chanHead.x*=1.0-keyHit[i]; chanHead.y*=1.0-keyHit[i]; chanHead.z*=1.0-keyHit[i];
           chanHeadActive.x*=0.5; chanHeadActive.y*=0.5; chanHeadActive.z*=0.5;
@@ -496,6 +520,7 @@ void FurnaceGUI::drawPattern() {
         ImGui::PushStyleColor(ImGuiCol_Header,chanHead);
         ImGui::PushStyleColor(ImGuiCol_HeaderActive,chanHeadActive);
         ImGui::PushStyleColor(ImGuiCol_HeaderHovered,chanHeadHover);
+        ImGui::PushStyleColor(ImGuiCol_Text,ImGui::GetColorU32(channelTextColor(i)));
         ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(chanHead));
         if (muted) ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_CHANNEL_MUTED]);
         ImGui::Selectable(chanID,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale));
@@ -513,7 +538,7 @@ void FurnaceGUI::drawPattern() {
           }
         }
         if (muted) ImGui::PopStyleColor();
-        ImGui::PopStyleColor(3);
+        ImGui::PopStyleColor(4);
         if (settings.soloAction!=2) if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
           inhibitMenu=true;
           e->toggleSolo(i);
diff --git a/src/gui/settings.cpp b/src/gui/settings.cpp
index 54da8e89..1bb94652 100644
--- a/src/gui/settings.cpp
+++ b/src/gui/settings.cpp
@@ -1284,14 +1284,14 @@ void FurnaceGUI::drawSettings() {
           }
 
           ImGui::Text("Channel name colors:");
-          if (ImGui::RadioButton("Single##CTC0",settings.channelColors==0)) {
-            settings.channelColors=0;
+          if (ImGui::RadioButton("Single##CTC0",settings.channelTextColors==0)) {
+            settings.channelTextColors=0;
           }
-          if (ImGui::RadioButton("Channel type##CTC1",settings.channelColors==1)) {
-            settings.channelColors=1;
+          if (ImGui::RadioButton("Channel type##CTC1",settings.channelTextColors==1)) {
+            settings.channelTextColors=1;
           }
-          if (ImGui::RadioButton("Instrument type##CTC2",settings.channelColors==2)) {
-            settings.channelColors=2;
+          if (ImGui::RadioButton("Instrument type##CTC2",settings.channelTextColors==2)) {
+            settings.channelTextColors=2;
           }
 
           ImGui::Text("Channel style:");
@@ -1659,6 +1659,8 @@ void FurnaceGUI::drawSettings() {
               ImGui::TreePop();
             }
             if (ImGui::TreeNode("Channel")) {
+              UI_COLOR_CONFIG(GUI_COLOR_CHANNEL_BG,"Single color (background)");
+              UI_COLOR_CONFIG(GUI_COLOR_CHANNEL_FG,"Single color (text)");
               UI_COLOR_CONFIG(GUI_COLOR_CHANNEL_FM,"FM");
               UI_COLOR_CONFIG(GUI_COLOR_CHANNEL_PULSE,"Pulse");
               UI_COLOR_CONFIG(GUI_COLOR_CHANNEL_NOISE,"Noise");