On 17 September 2011 14:23, Stefan Thomas
<[email protected]> wrote:
> Dear community,
> I would like to define a variable with sheme and I want to substract the
> number one from this variable.
> I tried it with:
>
>> % the following defines a Slur, lasting a certain number of eigth-notes
>> xaS = #(define-music-function (parser location x) (number?)
>> #{ % in der folgenden Zeile Lilypondcode eingeben
>> s1*0 ( \repeat unfold #(- $x 1) {s8 } s8)
>> #})
>
> Unfortunately without succes!
This doesn't work since the unfold count argument isn't a scheme
number. I suggest resetting 'repeat-count inside scheme instead:
\version "2.15.11"
xaS =
#(define-music-function (parser location x) (number?)
(let ((repeat-music #{ \repeat unfold 1 s8 #}))
(set! (ly:music-property repeat-music 'repeat-count)
(1- x))
(make-sequential-music
(list #{ s1*0( #} repeat-music #{ s8) #}))))
\new Voice \relative c' {
<< { c8 d e f } \xaS #4 >>
}
Cheers,
Neil
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