Re: Issue 1555 in lilypond: Multiple warnings concerning staff-affinities

[lilypond]

Comment #14 on issue 1555 by address@hidden: Multiple warnings  
concerning staff-affinities
http://code.google.com/p/lilypond/issues/detail?id=1555

I think there is a very good reason why #'staff-affinity = ##f is not the  
default.  Lyrics are normally associated with a Staff.  ChordNames are also  
normally associated with a staff.

Lyrics are by default below the staff, so their default #'staff-affinity is  
#UP.  ChordNames are by default above the staff, so their default  
#'staff-affinity is #DOWN.  Hence the warnings in this case.  We have  
ChordNames above Lyrics, so the 'staff-affinity  goes #DOWN #UP, which is  
wrong.  Normally, when we have non-staff contexts between staff contexts,  
the first non-staff is #UP (tied to the staff above), the last non-staff is  
#DOWN (tied to the staff below), and the remaining non-staffs are #CENTER  
(spaced off the adjacent non-staff contexts).


In this particular situation, there is no Staff.  So one of the contexts  
needs to be the fixed (staff) line.  Setting #'staff-affinity = ##f is a  
way to resolve this.  We could also eliminate the warnings by putting the  
Lyrics above the ChordNames:

\score {
  <<
    \new Lyrics \lyricmode {
      \markup { \fret-diagram #"w:4;4-o;3-o;2-1;1-3;"}
    }
    \new ChordNames \chordmode {
      g:m
    }
  >>
}


Or we could do the most logically consistent thing and have both contexts  
spaced as loose lines:

\score {
  <<
    \new ChordNames \with {
      \override VerticalAxisGroup #'staff-affinity = #CENTER
    } \chordmode {
      g:m
    }
    \new Lyrics \with {
      \override VerticalAxisGroup #'staff-affinity = #CENTER
    } \lyricmode {
      \markup { \fret-diagram #"w:4;4-o;3-o;2-1;1-3;"}
    }
  >>
}


Or we could do what Marc finally said gave him the best output, and just do  
the chord names and fret diagrams as markups.

Personally, I think that the current defaults are just right.  The use that  
Marc was making is clearly non-standard.  We have specifically given the  
answer to people wanting to write chord names and lyrics (i.e. for guitar)  
that LilyPond is not the right tool for the job.