I am trying to write an include file that will modify a music object dependent on the specified instrument. I am trying to write a function that will call the current music object and a user supplied argument string/number with the object of modifying the music object depending on the supplied number/string. I can get this to work if the two arguments are ( ly:music? color?) but not if they are (ly:music? number?) or (ly:music? string?) The function call in an include file aimed to get a music object and a user number is callmyfunction = #(define-music-function (parser location m n) (ly:music? number?) (anotherfunction m n)) This is a fragment of the include file In the lilypond file ... \callmyfunction #2 ....etc
The define-music-function does not accept a number or string my puzzle is how do I get the music object and the user argument into my include function. Any pointers gratefully recieved.... I think I am missing something crucial about define-music-function regards Peter Gentry
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