Got beeps working so long as you don't have ctcss set.

Reduced durations to sensible values.

openrtx/src/core/voicePromptUtils.c

@@ -914,8 +914,8 @@ void vp_playMenuBeepIfNeeded(bool firstItem)
     if (state.settings.vpLevel < vpBeep)
         return;
     if (firstItem)
-        vp_beep(500, 250);
+        vp_beep(500, 5);
     else
-        vp_beep(1000, 250);
+        vp_beep(1000, 5);
 }
 

openrtx/src/ui/ui.c

@@ -279,13 +279,13 @@ static void ReleaseFunctionLatchIfNeeded()
         return;
 
     functionLatchTimer = 0;
-    vp_beep(200, 500);
+    vp_beep(400, 10);
 }
 
 static void SetFunctionLatchTimer()
 {
     functionLatchTimer= getTick() + FUNCTION_LATCH_TIMEOUT;
-    vp_beep(800, 500);
+    vp_beep(800, 10);
 }
 
 static bool FunctionKeyIsLatched()

platform/targets/MD-UV3x0/platform.c

@@ -184,7 +184,7 @@ void platform_ledOff(led_t led)
 
 void platform_beepStart(uint16_t freq)
 {
-    toneGen_beepOn((float)freq, 255, 0);
+    toneGen_beepOn((float)freq, 128, 0);
 }
 
 void platform_beepStop()