Re: changes leads to error

[Lukas-Fabian Moser]

Hi again,

> Anyway, it seems to me that, even before that change, you had no 
> possibility of writing something like "4 dotted quarter notes". Do you 
> need that functionality?

So how about:

\version "2.22.0"

notetime =
#(define-music-function (count unit) (index? ly:duration?)
   (let* ((unit-length (ly:duration-length unit))
          (unit-numerator (ly:moment-main-numerator unit-length))
          (unit-denominator (ly:moment-main-denominator unit-length))
          (timesig-markup
           (markup #:override '(baseline-skip . 0.5)
                   #:column (#:number (number->string count)
                                      #:override '(style . default)
                                      #:note unit DOWN))))
     #{
       \once\override Staff.TimeSignature.stencil =
       #(lambda (grob) (grob-interpret-markup grob timesig-markup))
       \time #(cons (* count unit-numerator) unit-denominator)
     #}))

{
  \notetime 4 4.
  \repeat unfold 12 { a8 b c' d' }
}

Internally, this creates a 12/8 time signature (as it should, I think).

Lukas