diff --git a/components/control_plane/src/runtime/control_plane_system_events.c b/components/control_plane/src/runtime/control_plane_system_events.c
index ec76d99..a57425a 100644
--- a/components/control_plane/src/runtime/control_plane_system_events.c
+++ b/components/control_plane/src/runtime/control_plane_system_events.c
@@ -35,6 +35,7 @@
 #endif
 
 #define CONTROL_PLANE_PTT_HOLD_STEP_MS 80
+#define CONTROL_PLANE_MUYU_PROMPT_FILE "muyu.opus"
 
 #ifndef CONFIG_TQ_LOCAL_TASK_CORE
 #define CONFIG_TQ_LOCAL_TASK_CORE 1
@@ -195,6 +196,11 @@ static void control_plane_dispatch_key_event(const control_plane_key_event_t *ev
         if (expr_err != ESP_OK && expr_err != ESP_ERR_INVALID_STATE) {
             ESP_LOGW(TAG, "PTT double-click expression failed: %s", esp_err_to_name(expr_err));
         }
+        esp_err_t prompt_err =
+            domain_runtime_behavior_play_prompt_file(CONTROL_PLANE_MUYU_PROMPT_FILE);
+        if (prompt_err != ESP_OK) {
+            ESP_LOGW(TAG, "PTT double-click muyu prompt failed: %s", esp_err_to_name(prompt_err));
+        }
         break;
     }
 
diff --git a/components/platform/assets/audio_prompts/muyu.opus b/components/platform/assets/audio_prompts/muyu.opus
new file mode 100644
index 0000000..71ab8f0
Binary files /dev/null and b/components/platform/assets/audio_prompts/muyu.opus differ