…and here’s a quick Lilypond example showing the incredible usefulness and flexibility of the note-denom form of TimeSignature (as well as showing off Lilypond’s fabulous handling of music timing):
%%% SNIPPET BEGINS \version "2.23.4" \layout { indent = 0 } seventwentiethtime = \markup { \override #'(baseline-skip . 0) \column { \line { \number "7" } \translate #'(-1.9 . 0) \line { \score { << \omit Score.TimeSignature \new RhythmicStaff \with { \override StaffSymbol.line-count = 0 } \magnifyMusic #5/6 { \stemDown \tweak TupletNumber.extra-offset #'(0.25 . 0.25) \tuplet 5/4 { c'16 } } >> } } } } %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Some sample music %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% { \time 4/4 \repeat unfold 8 { c'16 } \tuplet 5/4 4 { \repeat unfold 10 { c'16 } } \override Staff.TimeSignature.stencil = #ly:text-interface::print \override Staff.TimeSignature.text = #seventwentiethtime \time #'(3 4) 7/20 \repeat unfold 14 { c'16*4/5 } \bar"|." } %%% SNIPPET ENDS I cannot personally envision how this music can be engraved **with exactly the same immediate [essentially sight-readable] clarity** using “regular” time signatures. Hope that helps! Kieren.