+global = \notes {
+ \property StaffGroup.timeSignatureStyle = "old"
+ \time 4/4;
+ \tempo 4=80;
+ \skip 1*31;
+ \property StaffGroup.timeSignatureStyle = "1"
+ \time 3/2;
+ \bar ":|:";
+ \tempo 2=140;
+ \skip 1.*15;
+ \property StaffGroup.timeSignatureStyle = "old"