Re: Any way to get "optional" chords?

[Flaming Hakama by Elaine]

One problem that I'm currently encountering is dealing with optional

chords. (The chord letters above the staff for guitar players.) These 

are generally shown in either parentheses or square brackets. Is there

a way to handle several arbitrary chord names  differently on a score?

By this I mean, for example, just this D, but not the others.

Here is a solution from the german forum
http://www.lilypondforum.de/index.php?action="">

There is a \paren command for a single chord, and the pair of \leftParen \rightParen for multiple chords.  Note that the right paren command comes before the last chord.

\version "2.19.15"

#(define (parenthesis-ignatzek-chord-names in-pitches bass inversion
context)
(markup #:line ( "(" (ignatzek-chord-names in-pitches bass inversion
context) ")" )))

#(define (left-parenthesis-ignatzek-chord-names in-pitches bass inversion
context)
(markup #:line ( "(" (ignatzek-chord-names in-pitches bass inversion
context) )))

#(define (right-parenthesis-ignatzek-chord-names in-pitches bass inversion
context)
(markup #:line ( (ignatzek-chord-names in-pitches bass inversion context)
")" )))

paren = #(define-music-function (parser location griffe) (ly:music?)
#{
        \set chordNameFunction = #parenthesis-ignatzek-chord-names
        $griffe
        \set chordNameFunction = #ignatzek-chord-names
#})

leftParen = #(define-music-function (parser location griffe) (ly:music?)
#{
        \set chordNameFunction = #left-parenthesis-ignatzek-chord-names
        $griffe
        \set chordNameFunction = #ignatzek-chord-names
#})

rightParen = #(define-music-function (parser location griffe) (ly:music?)
#{
        \set chordNameFunction = #right-parenthesis-ignatzek-chord-names
        $griffe
        \set chordNameFunction = #ignatzek-chord-names
#})


\new ChordNames \chordmode {
    c2:maj7 \paren a:7 | d:m g:7 | c1 | \leftParen es4:m7 aes:7 d:m \rightParen g:7
}

 

HTH,

David Elaine Alt

415 . 341 .4954                                           "Confusion is highly underrated"

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