Update app.py

app.py

@@ -9,9 +9,7 @@ def text_to_speech(text):
         mp3_data = io.BytesIO()
         speech.save(mp3_data)
         mp3_data.seek(0)
-        return mp3_data.read()
-    else:
-        return None
+        return mp3_data
 
 iface = gr.Interface(
     fn=text_to_speech,