增加低通效果开关

- 引入DoTween
- 实现功能

Assets/Scripts/OCES/ButtonInvoker.cs

@@ -1,18 +1,21 @@
 using UnityEngine;
 using UnityEngine.UI;
 using OCES.Audio;
+using UnityEngine.Audio;
 
 namespace OCES
 {
     public class ButtonInvoker : MonoBehaviour
     {
         public GameState targetGameState;
+        public bool enableLowpass;
         
         Button m_button;
 
         void Awake()
         {
             this.m_button = GetComponent<Button>();
+            
 
             this.m_button.onClick.AddListener(ButtonPressed); 
         }
@@ -25,6 +28,8 @@ namespace OCES
         private void ButtonPressed()
         {
             AudioSystem.Instance.SetState(this.targetGameState);
+
+            AudioSystem.Instance.SetLowpass(this.enableLowpass);
         }
     }
 }