diff --git a/APP/app_adc.c b/APP/app_adc.c
index a8fecd5..0b95062 100644
--- a/APP/app_adc.c
+++ b/APP/app_adc.c
@@ -303,6 +303,14 @@ void app_adc_sync_volume(uint16_t val)
     app_adc_volume_map_level(val);
 }
 
+/* 取当前主音量（复用扫描任务维护的最近一次有效值）。
+ * 模拟开关同一时刻只选中一路，离开扫描上下文直接重读 ADC 会串到
+ * 其它通道，故统一走 vol_last；未初始化（0xFFFF）时按静音兜底 */
+uint8_t app_adc_get_volume(void)
+{
+    return (vol_last > 127) ? 0 : (uint8_t)vol_last;
+}
+
 static void app_adc_volume_process(void)
 {
     uint16_t val = ADC_ReadChannel(ADC_CHANNEL_1)>>5;
diff --git a/APP/app_adc.h b/APP/app_adc.h
index e0f0c0e..9e67e8e 100644
--- a/APP/app_adc.h
+++ b/APP/app_adc.h
@@ -27,4 +27,6 @@ void app_adc_in1_scan_part(uint8_t channel);
 bool app_adc_usb_is_plugged(void);
 /* ����/����������ͬ�� vol_last �� level������ɨ�������󴥷������� */
 void app_adc_sync_volume(uint16_t val);
+/* ȡ��ǰ��������0~127������ MasterVolume_Reapply ���ط�����ʹ�� */
+uint8_t app_adc_get_volume(void);
 #endif
\ No newline at end of file
diff --git a/Global/Global.c b/Global/Global.c
index 9a113c1..a7017c5 100644
--- a/Global/Global.c
+++ b/Global/Global.c
@@ -460,6 +460,16 @@ void Send_volume(uint8_t vol)
   SendMidiDataToDreamDSP(mMasterSysExVolume,12);
 }
 
+/* 重发当前主音量：开机补发 / 进模式主页 / 开始播放前调用。
+ * Dream 上电早期可能丢 SysEx，丢失后旋钮不动就不再重发，
+ * 会出现"图标低音量、实际音量大"；在关键时机重发可自愈 */
+void MasterVolume_Reapply(void)
+{
+  uint8_t vol = app_adc_get_volume();
+  app_adc_sync_volume(vol); /* 兜底刷新 level，保证图标与下发值一致 */
+  Send_volume(vol);
+}
+
 void Accomp_UpdatePlayingChord(void)
 {
   uint8_t midi_note_buff[4] = {0,};
@@ -494,6 +504,8 @@ void ADC_IN1_KEY_Handle(uint8_t key,bool on)
           case 1: AutoBandTop1_Postamble(0); break;
           case 2: AutoBandTop1_Postamble(1); break;
       }
+      /* 前奏/尾奏起奏前补发主音量，保证与图标一致 */
+      MasterVolume_Reapply();
       //AutoBandTop1_Start();
       AutoBandTop1_SyncStart();
       wk_delay_ms(50);
@@ -761,6 +773,10 @@ void Pick_Handle()
   note_cnt = GetChordNotesByType(chord_id, chord_type_index_map[chord_id].type, midi_note_buff);
   Return_Light_buff(KEY_ID_1629);
 
+  /* 首次起奏前补发主音量：防开机 SysEx 丢失后"图标低、实际大" */
+  if (StartFlag == 0)
+      MasterVolume_Reapply();
+
   switch(mGuiData[GUI_TAB_INDEX].Current)
   {
       case 3:
diff --git a/Global/Global.h b/Global/Global.h
index 66e9c75..7633200 100644
--- a/Global/Global.h
+++ b/Global/Global.h
@@ -213,6 +213,7 @@ uint8_t GUI_Item_AjustValue(GUI_SWITCH * Group, int8_t Dir);
 void GUI_Item_AjustLoopValue(GUI_SWITCH * Group, int8_t Dir);
 
 void Send_volume(uint8_t vol);
+void MasterVolume_Reapply(void);
 
 void ADC_IN1_KEY_Handle(uint8_t key,bool on);
 void TM1617_Handle(uint8_t key);
diff --git a/UI/UI_Idle.c b/UI/UI_Idle.c
index c048154..d5ce4e2 100644
--- a/UI/UI_Idle.c
+++ b/UI/UI_Idle.c
@@ -163,11 +163,11 @@ void IdleProcess(DisplayTaskMessage_Type msg)
             TM1629D_UpdateDisplay(0);
             StartTouchTask();
             StartScanTask();
-            /* Dream 上电稍后可能忽略首包 SysEx：再发主音量 + 调音台（保持关机前设置） */
+            /* Dream 上电稍后可能忽略首包 SysEx：再发主音量 + 调音台（保持关机前设置）。
+             * 此时扫描任务已启动、模拟开关在轮询，不可现场重读 ADC（会串通道），
+             * 统一用 MasterVolume_Reapply 取扫描任务维护的最近一次有效音量 */
             rt_thread_mdelay(400);
-            vol = ADC_ReadChannel(ADC_CHANNEL_1)>>5;
-            app_adc_sync_volume(vol);
-            Send_volume(vol);
+            MasterVolume_Reapply();
             LoadConfig();
             Draw_Volume_Bar(UI0902_VOL_X, UI0902_VOL_Y, level, 1, WHITE, GRAY);
         break;
diff --git a/UI/UI_SongMode.c b/UI/UI_SongMode.c
index c17efb4..d474677 100644
--- a/UI/UI_SongMode.c
+++ b/UI/UI_SongMode.c
@@ -242,7 +242,9 @@ void Touch_Action(int8_t FLAG, uint8_t ID, uint8_t areaIndex,uint8_t value)
           mGuiData[ID].Current = value;
           AutoBandTop1_SetRunVar(mGuiData[ID].Current); 
         }else
-        {  
+        {
+          /* 触摸起奏前补发主音量，保证实际音量与图标一致 */
+          MasterVolume_Reapply();
           AutoBandTop1_FillinWithIndex(value);
           AutoBandTop1_Start();
         }
diff --git a/UI/UI_SystemSet.c b/UI/UI_SystemSet.c
index dd06276..c7a89b8 100644
--- a/UI/UI_SystemSet.c
+++ b/UI/UI_SystemSet.c
@@ -124,6 +124,11 @@ void UI_SystemSet_Process(DisplayTaskMessage_Type msg)
 			label_top();
 			break;
 
+		case MSG_ID_EC_VOL:
+			/* 主音量已在 MainTask 下发；此处只刷新状态栏音量条，保证与旋钮一致 */
+			Draw_Volume_Bar(UI0902_VOL_X, UI0902_VOL_Y, msg.HiByte, 1, WHITE, GRAY);
+			break;
+
 		default:
 			break;
 	}
diff --git a/UI/UI_global.c b/UI/UI_global.c
index 59df327..a2daf93 100644
--- a/UI/UI_global.c
+++ b/UI/UI_global.c
@@ -54,6 +54,7 @@ void CallUI_Idle(void) {
 
 void CallUI_SongMode(void) {
   app_touch_suppress(500);
+  MasterVolume_Reapply(); /* 进模式补发主音量，防开机 SysEx 丢失后实际音量与图标不符 */
   UI_SongMode_Init();
   CurrUIProcress = UI_SongMode_Process;
   app_log_set_ui_page("Song");
@@ -62,8 +63,9 @@ void CallUI_SongMode(void) {
 
 void CallUI_ExpertMode(void) {
   app_touch_suppress(500);
+  MasterVolume_Reapply();
    UI_ExpertMode_Init();
-//  CurrUIProcress = UI_ExpertMode_Process; 
+//  CurrUIProcress = UI_ExpertMode_Process;
   CurrUIProcress = UI_SongMode_Process;
   app_log_set_ui_page("Expert");
   LOG_I("UI", "page ExpertMode");
@@ -71,8 +73,9 @@ void CallUI_ExpertMode(void) {
 
 void CallUI_FreeMode(void) {
   app_touch_suppress(500);
+  MasterVolume_Reapply();
    UI_FreeMode_Init();
-//  CurrUIProcress = UI_FreeMode_Process; 
+//  CurrUIProcress = UI_FreeMode_Process;
   CurrUIProcress = UI_SongMode_Process;
   app_log_set_ui_page("Free");
   LOG_I("UI", "page FreeMode");