Re: trying arranger and extract music

[Gilles Thibault]

> Unfortunately, I'm not able to manage some of the functions in the 
> right
> way.
Oh, I'm so sorry, I've been so busy this week, I haven't taken the time 
to read any messages of the Lilypond list.

> This example doesn't work and I can't find out the mistake:

The guilty line seems to be this one

  (rm 'Lower 4  (em UpperII s1) )

There are 2 functions: \eM (Lilypond function) and (em..) (scheme 
function) but both need 2 arguments.
In a Lilypond context
  \eM \music s1 s1*2    % music 2 to 4
In a scheme context
  (em music 2 4)
In my works, I don't use only the scheme version even in a Lilypond 
context.
Compare :
LowerI = {
  \eM \UpperI \M #1 {\M #2 s4 }
  r4 r8
}
and
LowerI = {
  #(em UpperI 1 '(2 4))
  r4 r8
}



--
Gilles