+ SCM elt = get_property ("element");
+ Pitch *old_pit = unsmob_pitch (get_property ("pitch"));
+ if (old_pit)
+ {
+ Pitch new_pit = *old_pit;
+ new_pit = new_pit.to_relative_octave (last);
+
+ SCM check = get_property ("absolute-octave");
+ if (scm_is_number (check)
+ && new_pit.get_octave () != scm_to_int (check))
+ {
+ Pitch expected_pit (scm_to_int (check),
+ new_pit.get_notename (),
+ new_pit.get_alteration ());
+ origin ()->warning (_f ("octave check failed; expected %s, found: %s",
+ expected_pit.to_string (),
+ new_pit.to_string ()));
+ new_pit = expected_pit;
+ }
+
+ set_property ("pitch", new_pit.smobbed_copy ());
+
+ last = new_pit;
+ }
+
+ if (Music *m = unsmob_music (elt))
+ last = m->to_relative_octave (last);
+
+ last = music_list_to_relative (get_property ("elements"), last, false);
+ return last;