diff --git a/main/application.cc b/main/application.cc
index e18429b..ca0fca0 100644
--- a/main/application.cc
+++ b/main/application.cc
@@ -132,7 +132,7 @@ void Application::Start() {
     auto& board = Board::GetInstance();
     board.Initialize();
 
-    audio_device_ = board.CreateAudioDevice();
+    audio_device_ = board.GetAudioDevice();
     audio_device_->Initialize();
     audio_device_->EnableInput(true);
     audio_device_->EnableOutput(true);
diff --git a/main/board.h b/main/board.h
index bb33a40..666f53a 100644
--- a/main/board.h
+++ b/main/board.h
@@ -11,6 +11,14 @@ void* create_board();
 class AudioDevice;
 
 class Board {
+private:
+    Board(const Board&) = delete; // 禁用拷贝构造函数
+    Board& operator=(const Board&) = delete; // 禁用赋值操作
+    virtual std::string GetBoardJson() = 0;
+
+protected:
+    Board() = default;
+
 public:
     static Board& GetInstance() {
         static Board* instance = nullptr;
@@ -23,20 +31,12 @@ public:
     virtual void Initialize() = 0;
     virtual void StartNetwork() = 0;
     virtual ~Board() = default;
-    virtual AudioDevice* CreateAudioDevice() = 0;
+    virtual AudioDevice* GetAudioDevice() = 0;
     virtual Http* CreateHttp() = 0;
     virtual WebSocket* CreateWebSocket() = 0;
     virtual bool GetNetworkState(std::string& network_name, int& signal_quality, std::string& signal_quality_text) = 0;
     virtual bool GetBatteryVoltage(int &voltage, bool& charging);
     virtual std::string GetJson();
-
-protected:
-    Board() = default;
-
-private:
-    Board(const Board&) = delete; // 禁用拷贝构造函数
-    Board& operator=(const Board&) = delete; // 禁用赋值操作
-    virtual std::string GetBoardJson() = 0;
 };
 
 #define DECLARE_BOARD(BOARD_CLASS_NAME) \
diff --git a/main/boards/bread-compact-ml307/compact_ml307_board.cc b/main/boards/bread-compact-ml307/compact_ml307_board.cc
index 19647a5..9fa1f7a 100644
--- a/main/boards/bread-compact-ml307/compact_ml307_board.cc
+++ b/main/boards/bread-compact-ml307/compact_ml307_board.cc
@@ -16,8 +16,9 @@ public:
         Ml307Board::Initialize();
     }
 
-    virtual AudioDevice* CreateAudioDevice() override {
-        return new AudioDevice();
+    virtual AudioDevice* GetAudioDevice() override {
+        static AudioDevice audio_device;
+        return &audio_device;
     }
 };
 
diff --git a/main/boards/bread-compact-wifi/compact_wifi_board.cc b/main/boards/bread-compact-wifi/compact_wifi_board.cc
index a422493..f53754c 100644
--- a/main/boards/bread-compact-wifi/compact_wifi_board.cc
+++ b/main/boards/bread-compact-wifi/compact_wifi_board.cc
@@ -16,8 +16,9 @@ public:
         WifiBoard::Initialize();
     }
 
-    virtual AudioDevice* CreateAudioDevice() override {
-        return new AudioDevice();
+    virtual AudioDevice* GetAudioDevice() override {
+        static AudioDevice audio_device;
+        return &audio_device;
     }
 };
 
diff --git a/main/boards/esp-box-3/esp_box3_board.cc b/main/boards/esp-box-3/esp_box3_board.cc
index be488b9..458d91a 100644
--- a/main/boards/esp-box-3/esp_box3_board.cc
+++ b/main/boards/esp-box-3/esp_box3_board.cc
@@ -12,8 +12,9 @@ public:
         WifiBoard::Initialize();
     }
 
-    virtual AudioDevice* CreateAudioDevice() override {
-        return new BoxAudioDevice();
+    virtual AudioDevice* GetAudioDevice() override {
+        static BoxAudioDevice audio_device;
+        return &audio_device;
     }
 };
 
diff --git a/main/boards/kevin-box-0/kevin_box_board.cc b/main/boards/kevin-box-0/kevin_box_board.cc
index bca0923..b3a025e 100644
--- a/main/boards/kevin-box-0/kevin_box_board.cc
+++ b/main/boards/kevin-box-0/kevin_box_board.cc
@@ -68,8 +68,9 @@ public:
         Ml307Board::Initialize();
     }
 
-    virtual AudioDevice* CreateAudioDevice() override {
-        return new BoxAudioDevice();
+    virtual AudioDevice* GetAudioDevice() override {
+        static BoxAudioDevice audio_device;
+        return &audio_device;
     }
 
     virtual bool GetBatteryVoltage(int &voltage, bool& charging) override {
diff --git a/main/boards/kevin-box-1/kevin_box_board.cc b/main/boards/kevin-box-1/kevin_box_board.cc
index 4b79b43..a2497d1 100644
--- a/main/boards/kevin-box-1/kevin_box_board.cc
+++ b/main/boards/kevin-box-1/kevin_box_board.cc
@@ -79,8 +79,9 @@ public:
         Ml307Board::Initialize();
     }
 
-    virtual AudioDevice* CreateAudioDevice() override {
-        return new BoxAudioDevice();
+    virtual AudioDevice* GetAudioDevice() override {
+        static BoxAudioDevice audio_device;
+        return &audio_device;
     }
 
     virtual bool GetBatteryVoltage(int &voltage, bool& charging) override {
diff --git a/main/boards/lichuang-dev/lichuang_dev_board.cc b/main/boards/lichuang-dev/lichuang_dev_board.cc
index 1c55aa8..cd660ae 100644
--- a/main/boards/lichuang-dev/lichuang_dev_board.cc
+++ b/main/boards/lichuang-dev/lichuang_dev_board.cc
@@ -12,8 +12,9 @@ public:
         WifiBoard::Initialize();
     }
 
-    virtual AudioDevice* CreateAudioDevice() override {
-        return new BoxAudioDevice();
+    virtual AudioDevice* GetAudioDevice() override {
+        static BoxAudioDevice audio_device;
+        return &audio_device;
     }
 };
 
diff --git a/main/ml307_board.cc b/main/ml307_board.cc
index 08125a3..48c4bbd 100644
--- a/main/ml307_board.cc
+++ b/main/ml307_board.cc
@@ -74,10 +74,6 @@ void Ml307Board::Initialize() {
     StartModem();
 }
 
-AudioDevice* Ml307Board::CreateAudioDevice() {
-    return new AudioDevice();
-}
-
 Http* Ml307Board::CreateHttp() {
     return new Ml307Http(modem_);
 }
diff --git a/main/ml307_board.h b/main/ml307_board.h
index bfb5a30..8ccf9d5 100644
--- a/main/ml307_board.h
+++ b/main/ml307_board.h
@@ -15,7 +15,6 @@ public:
     Ml307Board();
     virtual void Initialize() override;
     virtual void StartNetwork() override;
-    virtual AudioDevice* CreateAudioDevice() override;
     virtual Http* CreateHttp() override;
     virtual WebSocket* CreateWebSocket() override;
     virtual bool GetNetworkState(std::string& network_name, int& signal_quality, std::string& signal_quality_text) override;