diff --git a/Assets/StreamingAssets/VoiceAssistant/hey care bot.table b/Assets/StreamingAssets/VoiceAssistant/hey care bot.table
new file mode 100644
index 0000000..f313787
Binary files /dev/null and b/Assets/StreamingAssets/VoiceAssistant/hey care bot.table differ
diff --git a/Assets/StreamingAssets/VoiceAssistant/hey care bot.table.meta b/Assets/StreamingAssets/VoiceAssistant/hey care bot.table.meta
new file mode 100644
index 0000000..59985ed
--- /dev/null
+++ b/Assets/StreamingAssets/VoiceAssistant/hey care bot.table.meta	
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: f541e80887be9b841a5f1d73f29ec235
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/StreamingAssets/VoiceAssistant/715948c4-7d2a-423c-8f7f-7a82c44ee5de.table b/Assets/StreamingAssets/VoiceAssistant/hey mike.table
similarity index 100%
rename from Assets/StreamingAssets/VoiceAssistant/715948c4-7d2a-423c-8f7f-7a82c44ee5de.table
rename to Assets/StreamingAssets/VoiceAssistant/hey mike.table
diff --git a/Assets/StreamingAssets/VoiceAssistant/715948c4-7d2a-423c-8f7f-7a82c44ee5de.table.meta b/Assets/StreamingAssets/VoiceAssistant/hey mike.table.meta
similarity index 100%
rename from Assets/StreamingAssets/VoiceAssistant/715948c4-7d2a-423c-8f7f-7a82c44ee5de.table.meta
rename to Assets/StreamingAssets/VoiceAssistant/hey mike.table.meta
diff --git a/Assets/UVC4UnityAndroidPlugin/Scripts/UVCManager.cs b/Assets/UVC4UnityAndroidPlugin/Scripts/UVCManager.cs
index ec60401..48e1571 100644
--- a/Assets/UVC4UnityAndroidPlugin/Scripts/UVCManager.cs
+++ b/Assets/UVC4UnityAndroidPlugin/Scripts/UVCManager.cs
@@ -1,4 +1,4 @@
-#define ENABLE_LOG
+#define ENABLE_LOG
 /*
  * Copyright (c) 2014 - 2022 t_saki@serenegiant.com 
  */
@@ -493,6 +493,7 @@ namespace Serenegiant.UVC
 		 */
         private bool HandleOnAttachEvent(UVCDevice device/*NonNull*/)
         {
+            return FilterDevice(device.name);
             if ((UVCDrawers == null) || (UVCDrawers.Length == 0))
             {   // IUVCDrawerが割り当てられていないときはtrue(接続されたUVC機器を使用する)を返す
                 return true;
@@ -517,6 +518,17 @@ namespace Serenegiant.UVC
             }
         }
 
+        /// <summary>
+        /// 由于USB相机有两个摄像头，暂时根据名称过滤设备
+        /// </summary>
+        /// <param name="deviceName"></param>
+        /// <returns></returns>
+        bool FilterDevice(string deviceName)
+        {
+            Debug.Log(deviceName+"  :"+ (deviceName == "/dev/bus/usb/002/008"));
+            return deviceName == "/dev/bus/usb/002/008";
+        }
+
         /**
 		 * UVC機器が取り外されたときの処理の実体
 		 * @param info
diff --git a/Assets/_VoiceAssistant/Scenes/ChatScene.unity b/Assets/_VoiceAssistant/Scenes/ChatScene.unity
index 095d975..4553564 100644
--- a/Assets/_VoiceAssistant/Scenes/ChatScene.unity
+++ b/Assets/_VoiceAssistant/Scenes/ChatScene.unity
@@ -3338,8 +3338,8 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   maxRecordingLength: 20
-  maxVolumn: 0.008
-  minVolumn: 0.002
+  maxVolume: 0.008
+  minVolume: 0.002
   invalidWaitTime: 1.5
   startWaitingTime: 5
 --- !u!4 &830768048
@@ -4826,7 +4826,7 @@ MonoBehaviour:
   m_EditorClassIdentifier: 
   key: 82cc4e6b21cc49358f93f7196effc0c1
   ServiceRegion: eastasia
-  kwsModelFile: 715948c4-7d2a-423c-8f7f-7a82c44ee5de.table
+  kwsModelFile: hey care bot.table
 --- !u!4 &1674986170
 Transform:
   m_ObjectHideFlags: 0
@@ -5560,7 +5560,7 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   url: https://aip.baidubce.com/rpc/2.0/ai_custom/v1/wenxinworkshop/chat/eb-instant
-  m_Prompt: "\u4F60\u626E\u6F14\u540D\u53EBmike\u7684\u5927\u4F17\u6C7D\u8F66\u673A\u5668\u4EBA\u52A9\u624B\u548C\u6211\u5BF9\u8BDD\uFF0C100\u5B57\u4EE5\u5185\uFF0C\u4E0D\u8981\u4F7F\u7528\u8868\u60C5"
+  m_Prompt: "\u4F60\u626E\u6F14\u540D\u53EBcare bot\u7684\u5927\u4F17\u6C7D\u8F66\u673A\u5668\u4EBA\u52A9\u624B\u548C\u6211\u5BF9\u8BDD\uFF0C100\u5B57\u4EE5\u5185\uFF0C\u4E0D\u8981\u4F7F\u7528\u8868\u60C5"
   lan: english
   m_HistoryKeepCount: 15
   m_DataList: []
diff --git a/Assets/_VoiceAssistant/Scripts/Development.meta b/Assets/_VoiceAssistant/Scripts/Development.meta
new file mode 100644
index 0000000..3379d4b
--- /dev/null
+++ b/Assets/_VoiceAssistant/Scripts/Development.meta
@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 06b419732fd762b4cb4a9fdf1a236371
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/_VoiceAssistant/Scripts/Development/DevelopmentOptions.cs b/Assets/_VoiceAssistant/Scripts/Development/DevelopmentOptions.cs
new file mode 100644
index 0000000..b20e2c8
--- /dev/null
+++ b/Assets/_VoiceAssistant/Scripts/Development/DevelopmentOptions.cs
@@ -0,0 +1,60 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using SRDebugger;
+using System.ComponentModel;
+
+public partial class SROptions
+{
+    [Category("语音助手设置"), DisplayName("小于此音量一定时间后停止"), NumberRange(0, 0.008),Increment(0.001)]
+    public float MinVolume
+    {
+        get 
+        {
+            return PlayerPrefs.GetFloat("minVolume", 0.002f);
+        }
+        set
+        {
+            PlayerPrefs.SetFloat("minVolume", value);
+            AudioRecorder recorder = GameObject.FindObjectOfType<AudioRecorder>();
+            if (recorder)
+            {
+                recorder.minVolume = value;
+            }
+        }
+    }
+    [Category("语音助手设置"), DisplayName("大于此音量为有效"), NumberRange(0, 0.01), Increment(0.001)]
+    public float maxVolume
+    {
+        get
+        {
+            return PlayerPrefs.GetFloat("maxVolume", 0.008f);
+        }
+        set
+        {
+            PlayerPrefs.SetFloat("maxVolume", value);
+            AudioRecorder recorder = GameObject.FindObjectOfType<AudioRecorder>();
+            if (recorder)
+            {
+                recorder.maxVolume = value;
+            }
+        }
+    }
+    [Category("语音助手设置"),DisplayName("最大语音录制时长"),NumberRange(5,20)]
+    public int maxRecordingLength
+    {
+        get
+        {
+            return PlayerPrefs.GetInt("maxRecordingLength", 20);
+        }
+        set
+        {
+            PlayerPrefs.SetInt("maxRecordingLength", value);
+            AudioRecorder recorder = GameObject.FindObjectOfType<AudioRecorder>();
+            if(recorder)
+            {
+                recorder.maxRecordingLength = value;
+            }
+        }
+    }
+}
diff --git a/Assets/_VoiceAssistant/Scripts/Development/DevelopmentOptions.cs.meta b/Assets/_VoiceAssistant/Scripts/Development/DevelopmentOptions.cs.meta
new file mode 100644
index 0000000..497ed50
--- /dev/null
+++ b/Assets/_VoiceAssistant/Scripts/Development/DevelopmentOptions.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 951c88941f5b8404990d7a6c627bee41
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/_VoiceAssistant/Scripts/Voice/Utils/AudioRecorder.cs b/Assets/_VoiceAssistant/Scripts/Voice/Utils/AudioRecorder.cs
index 8dc6145..5ca9570 100644
--- a/Assets/_VoiceAssistant/Scripts/Voice/Utils/AudioRecorder.cs
+++ b/Assets/_VoiceAssistant/Scripts/Voice/Utils/AudioRecorder.cs
@@ -46,23 +46,23 @@ public class AudioRecorder : MonoBehaviour
     /// <summary>
     /// 最大录制时长。
     /// </summary>
-    public int maxRecordingLength = 10;
+    public int maxRecordingLength = 20;
     /// <summary>
     /// 大于此音量开始正式录音
     /// </summary>
-    public float maxVolumn = 0.75f;
+    public float maxVolume = 0.008f;
     /// <summary>
     /// 小于此音量为无效状态
     /// </summary>
-    public float minVolumn = 0.25f;
+    public float minVolume = 0.002f;
     /// <summary>
     /// 无效时长大于这个值，停止录音
     /// </summary>
-    public float invalidWaitTime = 0.5f;
+    public float invalidWaitTime = 1.5f;
     /// <summary>
     /// 开始等待时长。
     /// </summary>
-    public float startWaitingTime = 2;
+    public float startWaitingTime = 5;
     public event Action<AudioClip,StopReason> onRecordOver;
     AudioClip audioClip;
     float[] samples = new float[0];
@@ -73,6 +73,13 @@ public class AudioRecorder : MonoBehaviour
     {
         Init();
     }
+
+    void ReadConfig()
+    {
+        minVolume = PlayerPrefs.GetFloat("minVolume", 0.002f);
+        maxVolume = PlayerPrefs.GetFloat("maxVolume", 0.008f);
+        maxRecordingLength = PlayerPrefs.GetInt("maxRecordingLength", 20);
+    }
     void Init()
     {
 
@@ -90,6 +97,7 @@ public class AudioRecorder : MonoBehaviour
         {
             Debug.LogError("设备没有麦克风!");
         }
+        ReadConfig();
     }
 
     public void StartRecordAudio()
@@ -137,7 +145,7 @@ public class AudioRecorder : MonoBehaviour
             float volume = GetMaxVolume();
             if (status == Status.Waiting)
             {
-                if (volume > maxVolumn)
+                if (volume > maxVolume)
                 {
                     status = Status.Recording;
                     invalidTimer = 0;
@@ -153,7 +161,7 @@ public class AudioRecorder : MonoBehaviour
             }
             else if (status == Status.Recording)
             {
-                if (volume < minVolumn)
+                if (volume < minVolume)
                 {
                     invalidTimer += Time.deltaTime;
                 }
diff --git a/ProjectSettings/ProjectSettings.asset b/ProjectSettings/ProjectSettings.asset
index c795736..39632e9 100644
--- a/ProjectSettings/ProjectSettings.asset
+++ b/ProjectSettings/ProjectSettings.asset
@@ -48,7 +48,6 @@ PlayerSettings:
   defaultScreenHeightWeb: 600
   m_StereoRenderingPath: 0
   m_ActiveColorSpace: 0
-  unsupportedMSAAFallback: 0
   m_SpriteBatchVertexThreshold: 300
   m_MTRendering: 1
   mipStripping: 0