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Editorial annotations

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Adding fingerings to a score

Fingering instructions can be entered using a simple syntax. 

\relative c'' {
  c4-1 d-2 f-4 e-3
}

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Adding links to objects

To add a link to a grob stencil you can use add-link as defined here. It works both with \override and \tweak.

Drawback: point-and-click is disturbed for the linked grobs.

Limitation: Works for PDF only.

The linked objects are colored with a separate command. Note that the links are not displayed and are not clickable from inside the LSR. 

#(define (add-link url-strg)
  (lambda (grob)
    (let* ((stil (ly:grob-property grob 'stencil)))
      (if (ly:stencil? stil)
          (let* ((x-ext (ly:stencil-extent stil X))
                 (y-ext (ly:stencil-extent stil Y))
                 (url-expr `(url-link ,url-strg ,x-ext ,y-ext))
                 (new-stil
                   (ly:stencil-add
                     (ly:make-stencil url-expr x-ext y-ext)
                     stil)))
          (ly:grob-set-property! grob 'stencil new-stil))))))

%%%% test

%% For easier maintenance of this snippet the URL is formatted to use the
%% actually used LilyPond version.
%% Of course a literal URL would work as well.

#(define major.minor-version
  (string-join (take (string-split (lilypond-version) #\.) 2) "."))

urlI =
#(format #f
  "http://lilypond.org/doc/v~a/Documentation/notation/writing-pitches"
  major.minor-version)

urlII =
#(format #f
  "http://lilypond.org/doc/v~a/Documentation/notation/rhythms"
  major.minor-version)

urlIII =
#(format #f
  "http://lilypond.org/doc/v~a/Documentation/notation/note-heads"
  major.minor-version)

urlIV =
#(format #f
  "http://lilypond.org/doc/v~a/Documentation/notation/beams"
  major.minor-version)

urlV =
#(format #f
  "http://lilypond.org/doc/v~a/Documentation/notation/note-head-styles"
  major.minor-version)

urlVI =
#(format #f
  "http://lilypond.org/doc/v~a/Documentation/notation/writing-pitches"
  major.minor-version)

\relative c' {
   \key cis \minor

   \once \override Staff.Clef.color = #green
   \once \override Staff.Clef.after-line-breaking =
     #(add-link urlI)

   \once \override Staff.TimeSignature.color = #green
   \once \override Staff.TimeSignature.after-line-breaking =
     #(add-link urlII)

   \once \override NoteHead.color = #green
   \once \override NoteHead.after-line-breaking =
     #(add-link urlIII)

   cis'1
   \once \override Beam.color = #green
   \once \override Beam.after-line-breaking =
     #(add-link urlIV)
   cis8 dis e fis gis2
   <gis,
    \tweak Accidental.color #green
    \tweak Accidental.after-line-breaking #(add-link urlVI)
    \tweak color #green
    \tweak after-line-breaking #(add-link urlV)
    \tweak style #'harmonic
    bis
    dis
    fis
   >1
   <cis, cis' e>
}

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Adding markups in a tablature

By default markups does not show in a tablature.

To make them appear, simply use the command \revert TabStaff.TextScript.stencil 

%% http://lsr.di.unimi.it/LSR/Item?id=919
% by P.P.Schneider on June 2014

high  = { r4 r8 <g c'> q r8 r4 }

low = { c4 r4 c8 r8 g,8 b, }

pulse = { s8^"1" s^"&" s^"2" s^"&" s^"3" s^"&" s^"4" s^"&" }

\score {
 \new TabStaff {
   \repeat unfold 2 << \high \\ \low \\ \pulse >>
  }
  \layout {
    \context {
      \TabStaff
      \clef moderntab
      \revert TextScript.stencil
      \override TextScript.font-series = #'bold
      \override TextScript.font-size = #-2
      \override TextScript.color = #red

    }
    \context {
      \Score
      proportionalNotationDuration = #(ly:make-moment 1/8)
    }
  }
}

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Far sì che la diteggiatura appaia dentro il rigo

Per impostazione predefinita, le diteggiature orientate verticalmente sono poste fuori dal rigo; questo comportamento tuttavia può essere disabilitato. Occorre fare attenzione alle situazioni in cui le diteggiature e i gambi sono rivolti nella stessa direzione: normalmente le diteggiature evitano soltanto i gambi con travature. Questa impostazione predefinita può essere cambiata in modo da evitare tutti i gambi oppure nessuno. L’esempio seguente mostra queste due opzioni, così come tornare al comportamento predefinito. 

\relative c' {
  <c-1 e-2 g-3 b-5>2
  \override Fingering.staff-padding = #'()
  <c-1 e-2 g-3 b-5>4 g'-0
  a8[-1 b]-2 g-0 r
  \override Fingering.add-stem-support = ##f
  a[-1 b]-2 g-0 r
  \override Fingering.add-stem-support = ##t
  a[-1 b]-2 g-0 r
  \override Fingering.add-stem-support = #only-if-beamed
  a[-1 b]-2 g-0 r
}

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Numeri di battuta alternativi

Si possono impostare due metodi alternativi di numerazione della battuta, utili specialmente per le ripetizioni. 

\relative c'{
  \set Score.alternativeNumberingStyle = #'numbers
  \repeat volta 3 { c4 d e f | }
    \alternative {
      { c4 d e f | c2 d \break }
      { f4 g a b | f4 g a b | f2 a | \break }
      { c4 d e f | c2 d }
    }
  c1 \break
  \set Score.alternativeNumberingStyle = #'numbers-with-letters
  \repeat volta 3 { c,4 d e f | }
    \alternative {
      { c4 d e f | c2 d \break }
      { f4 g a b | f4 g a b | f2 a | \break }
      { c4 d e f | c2 d }
    }
  c1
}

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Parentesi analitiche sopra il rigo

Delle semplici parentesi analitiche orizzontali vengono aggiunte, per impostazione predefinita, sotto il rigo. L’esempio seguente mostra un modo per posizionarle sopra il rigo. 

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

\relative c'' {
  \once \override HorizontalBracket.direction = #UP
  c2\startGroup
  d2\stopGroup
}

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Parentesi analitiche con etichette

Si può aggiungere del testo alle parentesi analitiche tramite la proprietà text del grob HorizontalBracketText. L’aggiunta di vari frammenti di testo alle parentesi che iniziano nello stesso momento musicale richiede l’uso del comando \tweak. Dopo un’interruzione di linea il testo viene messo tra parentesi. 

\paper { tagline = ##f }

\layout {
  \context {
    \Voice
    \consists "Horizontal_bracket_engraver"
    \override HorizontalBracket.direction = #UP
  }
}

{
  \once\override HorizontalBracketText.text = "a"
    c''\startGroup d''\stopGroup
    \once\override HorizontalBracketText.text = "a'"
    e''\startGroup d''\stopGroup |
  c''-\tweak HorizontalBracketText.text
        \markup \bold \huge "b" \startGroup
     -\tweak HorizontalBracketText.text "a" \startGroup
    d''\stopGroup
    e''-\tweak HorizontalBracketText.text "a'" \startGroup
    d''\stopGroup\stopGroup |
  c''-\tweak HorizontalBracketText.text foo \startGroup
    d'' e'' f'' | \break
  g'' a'' b'' c'''\stopGroup
}

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Applicazione degli stili delle teste di nota in base al grado della scala

La proprietà shapeNoteStyles può essere usata per definire vari stili di teste di nota per ogni grado della scala (definita dall’armatura di chiave o dalla proprietà tonic). Questa proprietà richiede un insieme di simboli, che può essere puramente arbitrario (sono permesse espressioni geometriche come triangle, cross e xcircle) o basato sull’antica tradizione tipografica americana (sono consentiti anche alcuni nomi di nota latini).

Detto questo, per imitare gli antichi canzionieri americani, ci sono vari stili predefiniti disponibili attraverso dei comodi comandi come \aikenHeads o \sacredHarpHeads.

Questo esempio mostra modi diversi di ottenere teste di nota di varie forme e illustra la possibilità di trasporre una melodia senza perdere la corrispondenza tra le funzioni armoniche e gli stili delle teste. 

fragment = {
  \key c \major
  c2 d
  e2 f
  g2 a
  b2 c
}

\new Staff {
  \transpose c d
  \relative c' {
    \set shapeNoteStyles = ##(do re mi fa
                               #f la ti)
    \fragment
  }

  \break

  \relative c' {
    \set shapeNoteStyles = ##(cross triangle fa #f
                               mensural xcircle diamond)
    \fragment
  }
}

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Blanking staff lines using the \whiteout command

The \whiteout command underlays a markup with a white box. Since staff lines are in a lower layer than most other grobs, this white box will not overlap any other grob. 

\layout {
  ragged-right = ##f
}

\relative c' {
  \override TextScript.extra-offset = #'(2 . 4)
  c2-\markup { \whiteout \pad-markup #0.5 "middle C" } c
}

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Changing a single note’s size in a chord

Individual note heads in a chord can be modified with the \tweak command inside a chord, by altering the font-size property.

Inside the chord (within the brackets < >), before the note to be altered, place the \tweak command, followed by font-size and define the proper size like #-2 (a tiny note head). 

\relative c' {
  <\tweak font-size #+2 c e g c
   \tweak font-size #-2 e>1
   ^\markup { A tiny e }_\markup { A big c }
}

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Changing the appearance of a slur from solid to dotted or dashed

The appearance of slurs may be changed from solid to dotted or dashed. 

\relative c' {
  c4( d e c)
  \slurDotted
  c4( d e c)
  \slurSolid
  c4( d e c)
  \slurDashed
  c4( d e c)
  \slurSolid
  c4( d e c)
}

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Coloring notes depending on their pitch

It is possible to color note heads depending on their pitch and/or their names: the function used in this example even makes it possible to distinguish enharmonics. 

%Association list of pitches to colors.
#(define color-mapping
   (list
    (cons (ly:make-pitch 0 0 NATURAL) (x11-color 'red))
    (cons (ly:make-pitch 0 0 SHARP) (x11-color 'green))
    (cons (ly:make-pitch 0 1 FLAT) (x11-color 'green))
    (cons (ly:make-pitch 0 2 NATURAL) (x11-color 'red))
    (cons (ly:make-pitch 0 2 SHARP) (x11-color 'green))
    (cons (ly:make-pitch 0 3 FLAT) (x11-color 'red))
    (cons (ly:make-pitch 0 3 NATURAL) (x11-color 'green))
    (cons (ly:make-pitch 0 4 SHARP) (x11-color 'red))
    (cons (ly:make-pitch 0 5 NATURAL) (x11-color 'green))
    (cons (ly:make-pitch 0 5 FLAT) (x11-color 'red))
    (cons (ly:make-pitch 0 6 SHARP) (x11-color 'red))
    (cons (ly:make-pitch 0 1 NATURAL) (x11-color 'blue))
    (cons (ly:make-pitch 0 3 SHARP) (x11-color 'blue))
    (cons (ly:make-pitch 0 4 FLAT) (x11-color 'blue))
    (cons (ly:make-pitch 0 5 SHARP) (x11-color 'blue))
    (cons (ly:make-pitch 0 6 FLAT) (x11-color 'blue))))

%Compare pitch and alteration (not octave).
#(define (pitch-equals? p1 p2)
   (and
    (= (ly:pitch-alteration p1) (ly:pitch-alteration p2))
    (= (ly:pitch-notename p1) (ly:pitch-notename p2))))

#(define (pitch-to-color pitch)
   (let ((color (assoc pitch color-mapping pitch-equals?)))
     (if color
         (cdr color))))

#(define (color-notehead grob)
   (pitch-to-color
    (ly:event-property (event-cause grob) 'pitch)))

\score {
  \new Staff \relative c' {
    \override NoteHead.color = #color-notehead
    c8 b d dis ees f g aes
  }
}

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Controllare il posizionamento delle diteggiature di un accordo

Il posizionamento dei numeri della diteggiatura può essere regolato in modo preciso. Perché l’orientamento funzioni, occorre usare il costrutto per gli accordi <> anche per le note singole. Si può impostare in modo simile l’orientamento dei numeri di corda e delle diteggiature della mano destra. 

\relative c' {
  \set fingeringOrientations = #'(left)
  <c-1 e-3 a-5>4
  \set fingeringOrientations = #'(down)
  <c-1 e-3 a-5>4
  \set fingeringOrientations = #'(down right up)
  <c-1 e-3 a-5>4
  \set fingeringOrientations = #'(up)
  <c-1 e-3 a-5>4
  \set fingeringOrientations = #'(left)
  <c-1>2
  \set fingeringOrientations = #'(down)
  <e-3>2
  \set stringNumberOrientations = #'(up left down)
  <f\3 a\2 c\1>1
  \set strokeFingerOrientations = #'(down right up)
  <c\rightHandFinger #1 e\rightHandFinger #2 c'\rightHandFinger #4 >
}

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Creare un gruppetto ritardato

Creare un gruppetto ritardato, dove la nota più bassa del gruppetto usa l’alterazione, richiede vari \override. La proprietà outside-staff-priority deve essere impostata su #f, perché altrimenti questa avrebbe la precedenza sulla proprietà avoid-slur. Cambiando la frazione 2/3 si aggiusta la posizione orizzontale. 

\relative c'' {
  \after 2*2/3 \turn c2( d4) r |
  \after 4 \turn c4.( d8)
  \after 4
  {
    \once \set suggestAccidentals = ##t
    \once \override AccidentalSuggestion.outside-staff-priority = ##f
    \once \override AccidentalSuggestion.avoid-slur = #'inside
    \once \override AccidentalSuggestion.font-size = -3
    \once \override AccidentalSuggestion.script-priority = -1
    \once \hideNotes
    cis8\turn \noBeam
  }
  d4.( e8)
}

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Creating blank staves

To create blank staves, generate empty measures then remove the Bar_number_engraver from the Score context, and the Time_signature_engraver, Clef_engraver and Bar_engraver from the Staff context. 

#(set-global-staff-size 20)

\score {
  {
    \repeat unfold 12 { s1 \break }
  }
  \layout {
    indent = 0\in
    \context {
      \Staff
      \remove "Time_signature_engraver"
      \remove "Clef_engraver"
      \remove "Bar_engraver"
    }
    \context {
      \Score
      \remove "Bar_number_engraver"
    }
  }
}

% uncomment these lines for "letter" size
%{
\paper {
  #(set-paper-size "letter")
  ragged-last-bottom = ##f
  line-width = 7.5\in
  left-margin = 0.5\in
  bottom-margin = 0.25\in
  top-margin = 0.25\in
}
%}

% uncomment these lines for "A4" size
%{
\paper {
  #(set-paper-size "a4")
  ragged-last-bottom = ##f
  line-width = 180
  left-margin = 15
  bottom-margin = 10
  top-margin = 10
}
%}

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Creating double-digit fingerings

Creating fingerings larger than 5 is possible. 

\relative c' {
  c1-10
  c1-50
  c1-36
  c1-29
}

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Direzione predefinita dei gambi sulla linea centrale del rigo

La direzione predefinita dei gambi sulla linea centrale del rigo si imposta con la proprietà neutral-direction dell’oggetto Stem. 

\relative c'' {
  a4 b c b
  \override Stem.neutral-direction = #up
  a4 b c b
  \override Stem.neutral-direction = #down
  a4 b c b
}

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Different font size settings for instrumentName and shortInstrumentName

Choose different font sizes for instrumentName and shortInstrumentName as a context override. 

InstrumentNameFontSize =
#(define-music-function (font-size-pair)(pair?)
"Sets the @code{font-size} of @code{InstrumentName}.
The font-size for the initial @code{instrumentName} is taken from the first
value in @var{font-size-pair}.  @code{shortInstrumentName} will get the second
value of @var{font-size-pair}.
"

;; This code could be changed/extended to set different values for each
;; occurance of `shortInstrumentName'

#{
  \override InstrumentName.after-line-breaking =
    #(lambda (grob)
       (let* ((orig (ly:grob-original grob))
              (siblings (if (ly:grob? orig)
                            (ly:spanner-broken-into orig)
                            '())))
         (if (pair? siblings)
             (begin
               (ly:grob-set-property!
                 (car siblings)
                 'font-size
                 (car font-size-pair))
               (for-each
                 (lambda (g)
                   (ly:grob-set-property! g 'font-size (cdr font-size-pair)))
                 (cdr siblings))))))
#})

\layout {
  \context {
    \Staff
    \InstrumentNameFontSize #'(6 . -3)
  }
}

\new StaffGroup <<
  \new Staff
     \with {
       instrumentName = "Flute"
       shortInstrumentName = "Fl."
     }
     { c''1 \break c'' \break c'' }
  \new Staff
   \with {
     instrumentName = "Violin"
     shortInstrumentName = "Vl."
   }
   { c''1 \break c'' \break c'' }
>>

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Drawing boxes around grobs

The print-function can be overridden to draw a box around an arbitrary grob. 

\relative c'' {
  \override TextScript.stencil =
    #(make-stencil-boxer 0.1 0.3 ly:text-interface::print)
  c'4^"foo"

  \override Stem.stencil =
    #(make-stencil-boxer 0.05 0.25 ly:stem::print)
  \override Score.RehearsalMark.stencil =
    #(make-stencil-boxer 0.15 0.3 ly:text-interface::print)
  b8

  \revert Stem.stencil
  \revert Flag.stencil
  c4. c4
  \mark \default
  c1
}

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Drawing circles around note heads

Here is how to circle a note. 

circle =
\once \override NoteHead.stencil = #(lambda (grob)
    (let* ((note (ly:note-head::print grob))
           (combo-stencil (ly:stencil-add
               note
               (circle-stencil note 0.1 0.8))))
          (ly:make-stencil (ly:stencil-expr combo-stencil)
            (ly:stencil-extent note X)
            (ly:stencil-extent note Y))))

{ \circle c'' }

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Drawing circles around various objects

The \circle markup command draws circles around various objects, for example fingering indications. For other objects, specific tweaks may be required: this example demonstrates two strategies for rehearsal marks and measure numbers. 

\relative c' {
  c1
  \set Score.rehearsalMarkFormatter =
    #(lambda (mark context)
             (make-circle-markup (format-mark-numbers mark context)))
  \mark \default

  c2 d^\markup {
    \override #'(thickness . 3) {
      \circle \finger 2
    }
  }
  \override Score.BarNumber.break-visibility = #all-visible
  \override Score.BarNumber.stencil =
    #(make-stencil-circler 0.1 0.25 ly:text-interface::print)
}

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Embedding native PostScript in a \markup block

PostScript code can be directly inserted inside a \markup block. 

% PostScript is a registered trademark of Adobe Systems Inc.

\relative c'' {
  a4-\markup { \postscript "3 4 moveto 5 3 rlineto stroke" }
  -\markup { \postscript "[ 0 1 ] 0 setdash 3 5 moveto 5 -3 rlineto stroke " }

  b4-\markup { \postscript "3 4 moveto 0 0 1 2 8 4 20 3.5 rcurveto stroke" }
  s2
  a'1
}

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Modificare l’aspetto delle linee della griglia

L’aspetto delle linee della griglia può essere modificato sovrascrivendo alcune delle loro proprietà. 

\score {
  \new ChoirStaff <<
    \new Staff {
      \relative c'' {
        \stemUp
        c'4. d8 e8 f g4
      }
    }
    \new Staff {
      \relative c {
        % this moves them up one staff space from the default position
        \override Score.GridLine.extra-offset = #'(0.0 . 1.0)
        \stemDown
        \clef bass
        \once \override Score.GridLine.thickness = #5.0
        c4
        \once \override Score.GridLine.thickness = #1.0
        g'4
        \once \override Score.GridLine.thickness = #3.0
        f4
        \once \override Score.GridLine.thickness = #5.0
        e4
      }
    }
  >>
  \layout {
    \context {
      \Staff
      % set up grids
      \consists "Grid_point_engraver"
      % set the grid interval to one quarter note
      gridInterval = #(ly:make-moment 1/4)
    }
    \context {
      \Score
      \consists "Grid_line_span_engraver"
      % this moves them to the right half a staff space
      \override NoteColumn.X-offset = #-0.5
    }
  }
}

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Grid lines: emphasizing rhythms and notes synchronization

Regular vertical lines can be drawn between staves to show note synchronization; however, in case of monophonic music, you may want to make the second stave invisible, and make the lines shorter like in this snippet. 

\score {
  \new ChoirStaff {
    \relative c'' <<
      \new Staff {
        \time 12/8
        \stemUp
        c4. d8 e8 f g4 f8 e8. d16 c8
      }
      \new Staff {
        % hides staff and notes so that only the grid lines are visible
        \hideNotes
        \hide Staff.BarLine
        \override Staff.StaffSymbol.line-count = #0
        \hide Staff.TimeSignature
        \hide Staff.Clef

        % dummy notes to force regular note spacing
        \once  \override Score.GridLine.thickness = #4.0
        c8 c c
        \once  \override Score.GridLine.thickness = #3.0
        c8 c c
        \once  \override Score.GridLine.thickness = #4.0
        c8 c c
        \once  \override Score.GridLine.thickness = #3.0
        c8 c c
      }
    >>
  }
  \layout {
    \context {
      \Score
      \consists "Grid_line_span_engraver"
      % center grid lines horizontally below note heads
      \override NoteColumn.X-offset = #-0.5
    }
    \context {
      \Staff
      \consists "Grid_point_engraver"
      gridInterval = #(ly:make-moment 1/8)
      % set line length and positioning:
      % two staff spaces above center line on hidden staff
      % to four spaces below center line on visible staff
      \override GridPoint.Y-extent = #'(2 . -4)
    }
    ragged-right = ##t
  }
}

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Martellato e strappato

Il martellato (hammer on) e lo strappato (pull off) si possono ottenere con le legature di portamento. 

\new TabStaff {
  \relative c' {
    d4( e\2)
    a( g)
  }
}

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Martellato e strappato usando accordi

Quando il martellato o lo strappato si applicano a delle note in un accordo, viene disegnato un solo arco. Ma è possibile avere un “doppio arco” impostando la proprietà doubleSlurs su #t. 

\new TabStaff {
  \relative c' {
    % chord hammer-on and pull-off
    \set doubleSlurs = ##t
    <g' b>8( <a c> <g b>)
  }
}

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Martellato e strappato usando le voci

L’arco del martellato o dello strappato è rivolto in alto nella prima e terza voce, mentre è rivolto in basso nella seconda e quarta voce. 

\new TabStaff {
  \relative c' {
    << { \voiceOne g2( a) }
    \\ { \voiceTwo a,( b) }
    >> \oneVoice
  }
}

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Rendere alcune linee del rigo più spesse delle altre

In ambito didattico può essere utile rendere più spesso una linea del rigo (per esempio, la linea centrale, o per sottolineare la linea della chiave di Sol). Per farlo si possono aggiungere altre linee e posizionarle molto vicino alla linea che deve essere evidenziata, usando la proprietà line-positions dell’oggetto StaffSymbol. 

{
  \override Staff.StaffSymbol.line-positions =
    #'(-4 -2 -0.2 0 0.2 2 4)
  d'4 e' f' g'
}

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Marking notes of spoken parts with a cross on the stem (Sprechstimme)

This example shows how to put crosses on stems. Mark the beginning of a spoken section with the \speakOn keyword, and end it with the \speakOff keyword. 

speakOn = {
  \override Stem.stencil =
    #(lambda (grob)
       (let* ((x-parent (ly:grob-parent grob X))
              (is-rest? (ly:grob? (ly:grob-object x-parent 'rest))))
         (if is-rest?
             empty-stencil
             (ly:stencil-combine-at-edge
              (ly:stem::print grob)
              Y
              (- (ly:grob-property grob 'direction))
              (grob-interpret-markup grob
                                     (markup #:center-align #:fontsize -4
                                             #:musicglyph "noteheads.s2cross"))
              -2.3))))
}

speakOff = {
  \revert Stem.stencil
  \revert Flag.stencil
}

\score {
  \new Staff {
    \relative c'' {
      a4 b a c
      \speakOn
      g4 f r g
      b4 r d e
      \speakOff
      c4 a g f
    }
  }
}

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Measure counter

This snippet provides a workaround for emitting measure counters using transparent percent repeats. 

<<
  \context Voice = "foo" {
    \clef bass
    c4 r g r
    c4 r g r
    c4 r g r
    c4 r g r
  }
  \context Voice = "foo" {
    \set countPercentRepeats = ##t
    \hide PercentRepeat
    \override PercentRepeatCounter.staff-padding = #1
    \repeat percent 4 { s1 }
  }
>>

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Measure spanner

Measure spanners are an alternate way to print annotated brackets. As opposed to horizontal brackets, they extend between two bar lines rather than two notes. The text is displayed in the center of the bracket. 

\paper { tagline = ##f }

\layout {
  \context {
    \Staff
    \consists Measure_spanner_engraver
  }
}

<<
  \new Staff \relative c'' {
    \key d \minor
    R1*2
    \tweak text "Answer"
    \startMeasureSpanner
    \tuplet 3/2 8 {
      a16[ b c] d[ c b]  c[ d e] f[ e d]
    }
    e8 a gis g
    fis f e d~ d c b e
    \stopMeasureSpanner
  }
  \new Staff \relative c' {
    \key d \minor
    \tweak text "Subject"
    \tweak direction #DOWN
    \startMeasureSpanner
    \tuplet 3/2 8 {
      d16[ e f] g[ f e] f[ g a] bes[ a g]
    }
    a8 d cis c
    b bes a g~ g f e a
    \stopMeasureSpanner
    \tweak text "Counter-subject"
    \tweak direction #DOWN
    \startMeasureSpanner
    f8 e a r r16 b, c d e fis g e
    a gis a b c fis, b a gis e a4 g8
    \stopMeasureSpanner
  }
>>

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Numbering groups of measures

This snippet demonstrates the use of the Measure_counter_engraver to number groups of successive measures. Any stretch of measures may be numbered, whether consisting of repetitions or not.

The engraver must be added to the appropriate context. Here, a Staff context is used; another possibility is a Dynamics context.

The counter is begun with \startMeasureCount and ended with \stopMeasureCount. Numbering will start by default with 1, but this behavior may be modified by overriding the count-from property.

When a measure extends across a line break, the number will appear twice, the second time in parentheses. 

\layout {
  \context {
    \Staff
    \consists #Measure_counter_engraver
  }
}

\new Staff {
  \startMeasureCount
  \repeat unfold 7 {
    c'4 d' e' f'
  }
  \stopMeasureCount
  \bar "||"
  g'4 f' e' d'
  \override Staff.MeasureCounter.count-from = #2
  \startMeasureCount
  \repeat unfold 5 {
    g'4 f' e' d'
  }
  g'4 f'
  \bar ""
  \break
  e'4 d'
  \repeat unfold 7 {
    g'4 f' e' d'
  }
  \stopMeasureCount
}

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Positioning fingering indications precisely

Generally the options available for positioning the fingering of chords work well by default, but if one of the indications needs to positioned more precisely the following tweak may be used. This is particularly useful for correcting the positioning when intervals of a second are involved. 

\relative c' {
  \set fingeringOrientations = #'(left)
  <c-1 d-2 a'-5>4
  <c-1 d-\tweak extra-offset #'(0 . 0.2)-2 a'-5>4
  \set fingeringOrientations = #'(down)
  <c-1 d-2 a'-5>4
  <c-\tweak extra-offset #'(0 . -1.1)-1
   d-\tweak extra-offset #'(-1.2 . -1.8)-2 a'-5>4
  \set fingeringOrientations = #'(down right up)
  <c-1 d-\tweak extra-offset #'(-0.3 . 0)-2 a'-5>4
  <c-1 d-\tweak extra-offset #'(-1 . 1.2)-2 a'-5>4
  \set fingeringOrientations = #'(up)
  <c-1 d-\tweak extra-offset #'(0 . 1.1)-2
   a'-\tweak extra-offset #'(0 . 1)-5>4
  <c-1 d-\tweak extra-offset #'(-1.2 . 1.5)-2
   a'-\tweak extra-offset #'(0 . 1.4)-5>4
}

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Posizionare il testo a margine dentro le legature di portamento

I testi a margine devono avere la proprietà outside-staff-priority impostata su false per poter apparire dentro le legature di portamento. 

\relative c'' {
  \override TextScript.avoid-slur = #'inside
  \override TextScript.outside-staff-priority = ##f
  c2(^\markup { \halign #-10 \natural } d4.) c8
}

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Printing text from right to left

It is possible to print text from right to left in a markup object, as demonstrated here. 

{
  b1^\markup {
    \line { i n g i r u m i m u s n o c t e }
  }
  f'_\markup {
    \override #'(text-direction . -1)
    \line { i n g i r u m i m u s n o c t e }
  }
}

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String number extender lines

Make an extender line for string number indications, showing that a series of notes is supposed to be played all on the same string. 

stringNumberSpanner =
  #(define-music-function (StringNumber) (string?)
    #{
      \override TextSpanner.style = #'solid
      \override TextSpanner.font-size = #-5
      \override TextSpanner.bound-details.left.stencil-align-dir-y = #CENTER
      \override TextSpanner.bound-details.left.text =
        \markup { \circle \number $StringNumber }
    #})


\relative c {
  \clef "treble_8"
  \stringNumberSpanner "5"
  \textSpannerDown
  a8\startTextSpan
  b c d e f\stopTextSpan
  \stringNumberSpanner "4"
  g\startTextSpan a
  bes4 a g2\stopTextSpan
}

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Using PostScript to generate special note head shapes

When a note head with a special shape cannot easily be generated with graphic markup, PostScript code can be used to generate the shape. This example shows how a parallelogram-shaped note head is generated. 

parallelogram =
  #(ly:make-stencil (list 'embedded-ps
    "gsave
      currentpoint translate
      newpath
      0 0.25 moveto
      1.3125 0.75 lineto
      1.3125 -0.25 lineto
      0 -0.75 lineto
      closepath
      fill
      grestore" )
    (cons 0 1.3125)
    (cons -.75 .75))

myNoteHeads = \override NoteHead.stencil = \parallelogram
normalNoteHeads = \revert NoteHead.stencil

\relative c'' {
  \myNoteHeads
  g4 d'
  \normalNoteHeads
  <f, \tweak stencil \parallelogram b e>4 d
}

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Uso della proprietà whiteout

Qualsiasi oggetto grafico può essere posizionato sopra uno sfondo bianco per mascherare parti degli oggetti che si trovano sotto. Ciò può essere utile per migliorare l’aspetto delle collisioni in situazioni complesse in cui il riposizionamento degli oggetti è troppo difficile. Bisogna impostare esplicitamente la proprietà layer (livello) per controllare quali oggetti debbano essere mascherati dallo sfondo bianco.

In questo esempio la collisione della legatura di valore con l’indicazione di tempo viene migliorata mascherando la parte della legatura che incrocia l’indicazione di tempo impostando la proprietà whiteout di TimeSignature. Per farlo si sposta TimeSignature su un livello superiore a Tie, che viene lasciato al livello predefinito 1; e StaffSymbol viene spostato su un livello superiore a TimeSignature in modo che non venga mascherato. 

{
  \override Score.StaffSymbol.layer = #4
  \override Staff.TimeSignature.layer = #3
  b'2 b'~
  \once \override Staff.TimeSignature.whiteout = ##t
  \time 3/4
  b' r4
}

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