diff --git a/coolq/cqcode.go b/coolq/cqcode.go
index 48c1cf1..f727a9d 100644
--- a/coolq/cqcode.go
+++ b/coolq/cqcode.go
@@ -928,8 +928,6 @@ func (bot *CQBot) ToElement(t string, d map[string]string, sourceType message.So
 			if !lawful {
 				return nil, errors.New("audio type error: " + mt)
 			}
-		}
-		if !global.IsAMRorSILK(data) {
 			data, err = global.EncoderSilk(data)
 			if err != nil {
 				return nil, err
diff --git a/db/multidb.go b/db/multidb.go
index 6d3825c..68d0ab3 100644
--- a/db/multidb.go
+++ b/db/multidb.go
@@ -45,6 +45,7 @@ func Open() error {
 			return errors.Wrap(err, "open backend error")
 		}
 	}
+	base.Database = nil
 	return nil
 }
 
diff --git a/modules/servers/servers.go b/modules/servers/servers.go
index 7a8ae28..e1c28c4 100644
--- a/modules/servers/servers.go
+++ b/modules/servers/servers.go
@@ -43,4 +43,5 @@ func Run(bot *coolq.CQBot) {
 	for _, fn := range nocfgsvr {
 		go fn(bot)
 	}
+	base.Servers = nil
 }