diff --git a/pywxdump/api/remote_server.py b/pywxdump/api/remote_server.py
index aacc2a2..7e50fdb 100644
--- a/pywxdump/api/remote_server.py
+++ b/pywxdump/api/remote_server.py
@@ -268,7 +268,7 @@ def get_video(videoPath):
 def get_audio(savePath):
     my_wxid = get_conf(g.caf, g.at, "last")
     if not my_wxid: return ReJson(1001, body="my_wxid is required")
-    merge_path = get_conf(g.caf, my_wxid, "merge_path")
+    db_config = get_conf(g.caf, my_wxid, "db_config")
 
     savePath = os.path.join(g.work_path, my_wxid, "audio", savePath)  # 这个是从url中获取的
     if os.path.exists(savePath):
@@ -282,8 +282,8 @@ def get_audio(savePath):
     if not os.path.exists(os.path.dirname(savePath)):
         os.makedirs(os.path.dirname(savePath))
 
-    parsing_media_msg = MediaHandler(merge_path)
-    wave_data = parsing_media_msg.get_audio(MsgSvrID, is_play=False, is_wave=True, save_path=savePath, rate=24000)
+    db = DBHandler(db_config)
+    wave_data = db.get_audio(MsgSvrID, is_play=False, is_wave=True, save_path=savePath, rate=24000)
     if not wave_data:
         return ReJson(1001, body="wave_data is required")
 
diff --git a/pywxdump/db/__init__.py b/pywxdump/db/__init__.py
index 1d2a3c4..b8145e2 100644
--- a/pywxdump/db/__init__.py
+++ b/pywxdump/db/__init__.py
@@ -35,6 +35,13 @@ class DBHandler(MicroHandler, MediaHandler, OpenIMContactHandler, PublicMsgHandl
         self.OpenIMMedia_exist = self.OpenIMMedia_tables_exist()
         self.Favorite_exist = self.Favorite_tables_exist()
 
+        if self.MSG_exist:  # 添加索引 StrTalker
+            self.Msg_add_index()
+        if self.PublicMsg_exist:  # 添加索引 StrTalker
+            self.PublicMsg_add_index()
+        if self.Micro_exist:  # 添加索引 StrTalker
+            self.Micro_add_index()
+
         # print(self.MSG_exist, self.Micro_exist, self.Media_exist, self.OpenIMContact_exist, self.PublicMsg_exist,
         #       self.OpenIMMedia_exist, self.Favorite_exist)
 
diff --git a/pywxdump/db/dbMSG.py b/pywxdump/db/dbMSG.py
index 3a06e5a..d80c476 100644
--- a/pywxdump/db/dbMSG.py
+++ b/pywxdump/db/dbMSG.py
@@ -29,6 +29,18 @@ class MsgHandler(DatabaseBase):
         """
         return self.check_tables_exist(self.MSG_required_tables)
 
+    def Msg_add_index(self):
+        """
+        添加索引,加快查询速度
+        """
+        # 检查是否存在索引
+        sql = "CREATE INDEX IF NOT EXISTS idx_MSG_StrTalker ON MSG(StrTalker);"
+        self.execute(sql)
+        sql = "CREATE INDEX IF NOT EXISTS idx_MSG_CreateTime ON MSG(CreateTime);"
+        self.execute(sql)
+        sql = "CREATE INDEX IF NOT EXISTS idx_MSG_StrTalker_CreateTime ON MSG(StrTalker, CreateTime);"
+        self.execute(sql)
+
     @db_error
     def get_msg_count(self, wxids: list = ""):
         """
diff --git a/pywxdump/db/dbMicro.py b/pywxdump/db/dbMicro.py
index 9d3027e..171ddba 100644
--- a/pywxdump/db/dbMicro.py
+++ b/pywxdump/db/dbMicro.py
@@ -24,6 +24,33 @@ class MicroHandler(DatabaseBase):
         """
         return self.check_tables_exist(self.Micro_required_tables)
 
+    def Micro_add_index(self):
+        """
+        添加索引, 加快查询速度
+        """
+        # 为 Session 表添加索引
+        self.execute("CREATE INDEX IF NOT EXISTS idx_Session_strUsrName_nTime ON Session(strUsrName, nTime);")
+        self.execute("CREATE INDEX IF NOT EXISTS idx_Session_nOrder ON Session(nOrder);")
+
+        # 为 Contact 表添加索引
+        self.execute("CREATE INDEX IF NOT EXISTS idx_Contact_UserName ON Contact(UserName);")
+
+        # 为 ContactHeadImgUrl 表添加索引
+        self.execute("CREATE INDEX IF NOT EXISTS idx_ContactHeadImgUrl_usrName ON ContactHeadImgUrl(usrName);")
+
+        # 为 ChatInfo 表添加索引
+        self.execute("CREATE INDEX IF NOT EXISTS idx_ChatInfo_Username_LastReadedCreateTime "
+                     "ON ChatInfo(Username, LastReadedCreateTime);")
+        self.execute("CREATE INDEX IF NOT EXISTS idx_ChatInfo_LastReadedCreateTime ON ChatInfo(LastReadedCreateTime);")
+
+        # 为 Contact 表添加复合索引
+        self.execute("CREATE INDEX IF NOT EXISTS idx_Contact_search "
+                     "ON Contact(UserName, NickName, Remark, Alias, QuanPin, PYInitial, RemarkQuanPin, RemarkPYInitial);")
+
+        # 为 ChatRoom 和 ChatRoomInfo 表添加索引
+        self.execute("CREATE INDEX IF NOT EXISTS idx_ChatRoom_ChatRoomName ON ChatRoom(ChatRoomName);")
+        self.execute("CREATE INDEX IF NOT EXISTS idx_ChatRoomInfo_ChatRoomName ON ChatRoomInfo(ChatRoomName);")
+
     @db_error
     def get_labels(self, id_is_key=True):
         """
diff --git a/pywxdump/db/dbPublicMsg.py b/pywxdump/db/dbPublicMsg.py
index 0cbdbd3..51b9b8d 100644
--- a/pywxdump/db/dbPublicMsg.py
+++ b/pywxdump/db/dbPublicMsg.py
@@ -39,6 +39,18 @@ class PublicMsgHandler(MsgHandler):
         """
         return self.check_tables_exist(self.PublicMSG_required_tables)
 
+    def PublicMsg_add_index(self):
+        """
+        添加索引,加快查询速度
+        """
+        # 检查是否存在索引
+        sql = "CREATE INDEX IF NOT EXISTS idx_PublicMsg_StrTalker ON MSG(StrTalker);"
+        self.execute(sql)
+        sql = "CREATE INDEX IF NOT EXISTS idx_PublicMsg_CreateTime ON MSG(CreateTime);"
+        self.execute(sql)
+        sql = "CREATE INDEX IF NOT EXISTS idx_PublicMsg_StrTalker_CreateTime ON MSG(StrTalker, CreateTime);"
+        self.execute(sql)
+
     @db_error
     def get_plc_msg_count(self, wxids: list = ""):
         """