Dear Philippe,
I guess a sensible solution for Bach’s B minor mass example would be just using \time 2/4 overriding the time signature stencil so that traditional alla breve time signature symbol will be printed: Minimal example, showing the beginning of the Alto I/II part: %%%%%%%%%%% \version "2.22.0" \relative { \once \override Staff.TimeSignature.stencil = #ly:text-interface::print \once \override Staff.TimeSignature.text = \markup \musicglyph #"timesig.C22" \time 4/2 \key d \major R1*2 | r1 r2 d'2( | e) fis g fis4 e | } All the best Torsten Von: lilypond-user <lilypond-user-bounces+torsten.haemmerle=web...@gnu.org> Im Auftrag von Philippe ZELLER Gesendet: Samstag, 27. März 2021 21:04 An: lilypond-user@gnu.org Betreff: Dear lilypond fellow users, it sometimes occurs in barock music that only every other barline is visible, (see e.g. Haendel's Salomo, choir at the end of Act II ) or that every other barline is printed in reduced size.(see e.g. Bach Mass in H-moll, nr 27 "dona nobis pacem" ). Is there a way to get this result in lilypond ? I first tried \set Score.barLineVisibility = #(every-nth-bar-number-visible 2) that I made up after an equivalent syntax for barNumber, but to no avail. Maybe I didn't put it in the right context ? Finally I used a rather complicated procedure based on global = { \repeat unfold 24 { s2. \once \override Staff.BarLine.transparent = ##t s2. \once \override Staff.BarLine.transparent = ##f } } which works but is not fully compatible, for example it does not work with multiMeasureRests. Many thanks in advance for your suggestions !