fix sound bug

app.py

@@ -792,6 +792,8 @@ def clearall():
     # global memory
     # memory_openai.clear()
     # memory.clear()
+    global Filename_Chatbot
+    Filename_Chatbot = []
     return []
 
 def retry(history3):
@@ -849,7 +851,8 @@ def playsound():
     try:
         if Filename_Chatbot.split(".")[1] == 'wav':
             soundfilename = Filename_Chatbot
-            return soundfilename
+            print("soundfilename:", soundfilename)
+            return gr.update(value = soundfilename)
     except:
         pass