+void
+Performer_group_performer::do_announces ()
+{
+ while (1)
+ {
+ create_audio_elements ();
+ performer_each (get_simple_trans_list (),
+ &Performer::create_audio_elements);
+
+ if (!announce_infos_.size ())
+ break ;
+
+ acknowledge_audio_elements ();
+ announce_infos_.clear ();
+ }
+}