Few days ago I asked how to get the number of beats and the duration of
each beat of a measure.
The reason was that I wanted to try to write some facilities to add a
ticktock measure at the beginning of a score:
My idea was to transform a score like this
\version "2.19.81"
music = {\time 3/4 a b c'}
\score {
\new Staff \music
\layout {} \midi {}
}
[image: image.png]
to something like this
\version "2.19.81"
music = {\time 3/4 a b c'}
myRests = {\time 3/4 r4 r r}
ticktock = \drummode {\time 3/4 hihat bassdrum bassdrum}
\score {
<<
\new Staff {\myRests \music}
\new DrumStaff { \ticktock}
>>
\layout {} \midi {}
}
[image: image.png]
For this I thought to write a substitution function etc. Something like
this (it doesn't compile):
\version "2.19.81"
myScore =
#(define-void-function (music) (ly:music?)
(let (myRests #{ \time 3/4 r4 r r #} ) (ticktock #{ \time 3/4 hihat
bassdrum bassdrum #}))
#{
\score {
<<
\new Staff {\myRests $music}
\new DrumStaff { \ticktock}
>>
\layout{} \midi{} } #})
music = {\time 3/4 a b c'}
\myScore \music
The "let" part is not correct. I don't know how to define variable
containing lilypond code using let. So any suggestion is appreciated.
And of course the function should create a myRests and ticktock of the
right length according to the $music contents.
Any help is appreciate.
Thank you, g.
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