+\score{
+ \context StaffGroup <
+ \ritme
+ \another
+ \context RhythmicStaff {
+ \yanother
+ }
+ >
+
+ \paper{
+
+ %% remove Timing_engraver and Bar_number_engraver
+ \translator {
+ \ScoreContext
+ \remove "Timing_engraver";
+ }
+ \translator {
+ \RhythmicStaffContext
+ \consists "Timing_engraver";
+ }
+ \translator{
+ \StaffContext
+ \consists "Timing_engraver";
+ }