+void
+Note_performer::stop_translation_timestep ()
+{
+ // why don't grace notes show up here?
+ // --> grace notes effectively do not get delayed
+ Moment now = now_mom ();
+ for (int i = 0; i < notes_.size (); i++)
+ play_element (notes_[i]);
+ notes_.clear ();
+ note_evs_.clear ();
+}
+
+bool
+Note_performer::try_music (Music *ev)