NR, 6.1.1 : probably, replace every "arg" with "var" (or otherwise):
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6.1.1 Overview of music functions
Making a function which substitutes a variable into LilyPond code is
easy. The general form of these functions is
function =
#(define-music-function (parser location var1 var2... )
(var1-type? var2-type?...)
#{
...music...
#})
where
argi ith variable
argi-type? type of variable
...music... normal LilyPond input, using variables as #$var1.
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Dmytro O. Redchuk
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