+Moment
+Music_sequence::cumulative_length (SCM l)
+{
+ Moment cumulative;
+ Moment last_len;
+
+ for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
+ {
+ Moment l = unsmob_music (scm_car (s))->get_length ();
+ if (last_len.grace_part_ && l.main_part_)
+ {
+ last_len.grace_part_ = Rational (0);
+ }
+ cumulative += last_len;
+ last_len = l;
+ }
+
+ last_len.grace_part_ = Rational (0);
+ cumulative += last_len;
+
+ return cumulative;
+}
+
+Moment
+Music_sequence::maximum_length (SCM l)
+{
+ Moment dur = 0;
+ for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
+ {
+ Music * m = unsmob_music (scm_car (s));
+ Moment l = m->get_length ();
+ dur = dur >? l;
+ }
+
+ return dur;
+}
+
+Pitch
+music_list_to_relative (SCM l,Pitch p, bool ret_first)