Hello Paul, formatting of the Metronome Marks is done by a function taking the event and the context given by the context property metronomeMarkFormatter.
If we look into ly/engraver-init.ly we see the default behaviour:
metronomeMarkFormatter = #format-metronome-markup
The scheme function format-metronome-markup is defined in scm/translation-
functions.scm:
(define-public (format-metronome-markup event context)
(let ((hide-note (ly:context-property context 'tempoHideNote #f))
(text (ly:event-property event 'text))
(dur (ly:event-property event 'tempo-unit))
(count (ly:event-property event 'metronome-count)))
(metronome-markup text dur count hide-note)))
where the scheme function metronome-markup is defined below:
(define (metronome-markup text dur count hide-note)
(let* ((note-mark
(if (and (not hide-note) (ly:duration? dur))
(make-smaller-markup
(make-note-by-number-markup
(ly:duration-log dur)
(ly:duration-dot-count dur)
UP))
#f))
(count-markup (cond ((number? count)
(if (> count 0)
(make-simple-markup
(number->string count))
#f))
((pair? count)
;; Thin Spaces U+2009 & En-dash U+2013
(make-simple-markup
(format #f "~a – ~a" (car count) (cdr count))))
(else #f)))
(note-markup (if (and (not hide-note) count-markup)
(list
(make-general-align-markup Y DOWN note-mark)
(make-simple-markup " = ")
count-markup)
#f))
(text-markup (if (not (null? text)) (make-bold-markup text) #f)))
(if text-markup
(if (and note-markup (not hide-note))
(make-line-markup (list (make-concat-markup
(append (list text-markup
(make-simple-markup " ("))
note-markup
(list (make-simple-markup
")"))))))
(make-line-markup (list text-markup)))
(if note-markup
(make-line-markup (list (make-concat-markup note-markup)))
(make-null-markup)))))
By copying these and adapting them to your liking you can shape the formatting
any way you want, such as
→ no parentheses
→ approx sign or other marks instead of =
→ Different order of text and metronome marking
Cheers,
Valentin
Am Samstag, 17. Dezember 2022, 19:18:17 CET schrieb Paul Scott:
> Tempo indications in some published music doesn't use parentheses, i.e.
> quarter = 120 rather than (quarter = 120). I have my own code to do
> this but would like to know if I can get Lilypond to omit the
> parentheses in:
>
> \version "2.24.0"
>
> \tempo 4 = 120
>
> TIA,
>
> Paul
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