Screenless Devices want to mute too!

src/buzz/buzz.cpp

@@ -35,6 +35,14 @@ struct ToneDuration {
 #define NOTE_G6 1568
 #define NOTE_E7 2637
 
+#define NOTE_C4 262
+#define NOTE_E4 330
+#define NOTE_G4 392
+#define NOTE_A4 440
+#define NOTE_C5 523
+#define NOTE_E5 659
+#define NOTE_G5 784
+
 const int DURATION_1_16 = 62;  // 1/16 note
 const int DURATION_1_8 = 125;  // 1/8 note
 const int DURATION_1_4 = 250;  // 1/4 note
@@ -189,3 +197,17 @@ void playComboTune()
     };
     playTones(melody, sizeof(melody) / sizeof(ToneDuration));
 }
+
+void play4ClickDown()
+{
+    ToneDuration melody[] = {{NOTE_G5, 55}, {NOTE_E5, 55}, {NOTE_C5, 60},  {NOTE_A4, 55},  {NOTE_G4, 55},
+                             {NOTE_E4, 65}, {NOTE_C4, 80}, {NOTE_G3, 120}, {NOTE_E3, 160}, {NOTE_SILENT, 120}};
+    playTones(melody, sizeof(melody) / sizeof(ToneDuration));
+}
+
+void play4ClickUp()
+{
+    // Quick high-pitched notes with trills
+    ToneDuration melody[] = {{NOTE_F5, 50}, {NOTE_G6, 45}, {NOTE_E7, 60}};
+    playTones(melody, sizeof(melody) / sizeof(ToneDuration));
+}

src/buzz/buzz.h

@@ -7,6 +7,8 @@ void playShutdownMelody();
 void playGPSEnableBeep();
 void playGPSDisableBeep();
 void playComboTune();
+void play4ClickDown();
+void play4ClickUp();
 void playBoop();
 void playChirp();
 void playClick();

src/input/ButtonThread.cpp

@@ -242,6 +242,18 @@ int32_t ButtonThread::runOnce()
                 playComboTune();
                 break;
 
+            case 4:
+                if (moduleConfig.external_notification.enabled && externalNotificationModule) {
+                    externalNotificationModule->setMute(!externalNotificationModule->getMute());
+                    IF_SCREEN(if (!externalNotificationModule->getMute()) externalNotificationModule->stopNow();)
+                }
+                if (externalNotificationModule->getMute()) {
+                    play4ClickDown(); // Disable tone
+                } else {
+                    play4ClickUp(); // Enable tone
+                }
+                break;
+
             // No valid multipress action
             default:
                 break;