Re: score in a music function?

[David Kastrup]

Stefan Thomas <address@hidden> writes:

> Dear community,
> is it possible to have the score command in a music function?

A music function returns music.  Use a scheme function to return
arbitrary Scheme.

> I need it for a piece with different movements.
> I've tried it with the following code which doesn't work:
>
> \version "2.16.2"
> TheScore = #(define-music-function (parser location x y) (ly:music?
> ly:music?)
> #{ 
> \score {
> \new StaffGroup
> <<
> \new Staff \with { instrumentName = "first" } $x
> \new Staff \with { instrumentName = "second" } $y
>>>
> }
> #})

Why don't you just return the StaffGroup here?  That's music.

I don't have 2.16 installed, but with current versions
\version "2.16.2"
TheScore = #(define-scheme-function (parser location x y) (ly:music?
ly:music?)
#{ 
\score {
\new StaffGroup
<<
\new Staff \with { instrumentName = "first" } $x
\new Staff \with { instrumentName = "second" } $y
>>
}
#})

first = \relative c' { c4 d e f g1 }
second = \relative c'' { g4 f e d c1 }

\score { \TheScore \first \second }

appears to work.  Of course, if you are going to have to write
\score { ... } anyway, the incentive for not just using a music function
is not all that high.

-- 
David Kastrup