diff --git a/idea.md b/idea.md
index e5a3bb5..9a41816 100644
--- a/idea.md
+++ b/idea.md
@@ -42,6 +42,8 @@
 -   每个怪物加一个怪物说明
 -   歌词展示系统
 -   小地图显示框，可以选择是否显示剩余怪物数量等
+-   怪物死亡特效
+-   区域名称显示特效，3D 粒子
 
 ### 第二章 智慧
 
diff --git a/src/core/audio/sound.ts b/src/core/audio/sound.ts
index 60094b0..aaa4b21 100644
--- a/src/core/audio/sound.ts
+++ b/src/core/audio/sound.ts
@@ -11,7 +11,7 @@ export class SoundEffect extends AudioPlayer {
     private _stopingAll: boolean = false;
     private playMap: Map<AudioBufferSourceNode, number> = new Map();
 
-    stereo: boolean = false;
+    private _stereo: boolean = false;
 
     gain: GainNode = AudioPlayer.ac.createGain();
     panner: PannerNode | null = null;
@@ -24,6 +24,14 @@ export class SoundEffect extends AudioPlayer {
         return this.gain.gain.value;
     }
 
+    set stereo(value: boolean) {
+        this._stereo = value;
+        this.initAudio(value);
+    }
+    get stereo(): boolean {
+        return this._stereo;
+    }
+
     constructor(data: ArrayBuffer, stereo: boolean = false) {
         super(data);
 
@@ -35,10 +43,10 @@ export class SoundEffect extends AudioPlayer {
             this.playMap.delete(node);
         });
         this.on('update', () => {
-            this.initAudio(this.stereo);
+            this.initAudio(this._stereo);
         });
 
-        this.stereo = stereo;
+        this._stereo = stereo;
     }
 
     /**