Re: Analysis brackets?

[M Watts]

Claudia wrote:
> Hi, I need to draw several superimposed -- although not nested --
> brackets in order to evidence two
> melodic overlapping structures for teaching purposes. Does
> anyone knows how to do it?
>
> I've tried Analysis brackets but the groupings are presumed nested
> and so, the group openings and
> closings are interpreted as in a heap.
>
> I'm looking for something like:
> \openGroup1 c d e f \openGroup2 g a b c \closeGroup1 d e fis g 
> \closeGroup2
As the Horizontal_bracket_engraver lives at voice level, overlapping 
brackets need to live in different voices.

\version "2.12.2"

upper = \relative c'' {
 c\startGroup d e s4
 g a b c\stopGroup
 d e fis s4
}

lower = \relative c'' {
 s2. f4\startGroup
 s1
 s2. g'4\stopGroup
}

\score {
 \new Staff {
   <<
     \voiceOne \upper
     \voiceThree \lower
   >>
 }
}

\layout {
 \context {
   \Voice
   \consists "Horizontal_bracket_engraver"
 }
}


Btw, you can put any bracket above the staff with \once \override 
HorizontalBracket #'direction = #UP