+
+void
+Performer::acknowledge_audio_element (Audio_element_info)
+{
+}
+
+void
+Performer::create_audio_elements ()
+{
+}
+
+
+void
+Performer::announce_element (Audio_element_info i)
+{
+ if (!i.origin_trans_)
+ i.origin_trans_= this;
+ get_daddy_perf ()->announce_element (i);
+}