Re: \numericTimeSignature works on Staff level?

[Jean Abou Samra]

Le 27/05/2021 à 16:18, Lukas-Fabian Moser a écrit :
> Hi,
>
> \numericTimeSignature works on Staff level - it has been this way 
> since its first introduction by Graham Percival in 2008 
> (929abcd11cf5305b0929e5ca75b12ffee9f57785). As a consequence,
>
> \version "2.22.1"
>
> <<
>   \new Staff {
>     \numericTimeSignature
>     \time 2/2
>     s1
>   }
>   \new Staff {
>     s1
>   }
> >>
>
> generates
>
> What's the rationale for this behaviour (rather than making 
> \numericTimeSignature act on Score level)?
>
> By default, setting \time command affects all simultaneous staves, and 
> I can't think of a reason why one should want "4/4" in one staff and 
> "c" in another.

When there is no conceivable rationale, either the code has a flaw or it 
is too obscure. I tend to agree with your assessment that 
\numericTimeSignature should by default act on Score level like \time does.

> Of course there are polymetric situations where simultaneous numeric 
> and non-numeric time signatures might be desired, but that's a 
> comparatively rare use case, and if am moving around the 
> Timing_translator anyway in \layout {}, I can also set 
> Staff.TimeSignature.style manually.

I think you want to make \numericTimeSignature work the same way as 
\cadenzaOn, on whatever context the Timing_translator gave the Timing 
alias to.

\version "2.23.3"

numericTimeSignature = \override Timing.TimeSignature.style = #'numbered

music =
<<
  \new Staff {
    \numericTimeSignature
    \time 2/2
    s1
  }
  \new Staff {
    s1
  }
>>

\score {
  \music
}

\score {
  \layout {
    \context {
      \Score
      \remove "Timing_translator"
      \remove "Default_bar_line_engraver"
    }
    \context {
      \Staff
      \consists "Timing_translator"
      \consists "Default_bar_line_engraver"
    }
  }
  \music
}


Patch awaited.

Regards,
Jean