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Repeats

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Aggiungere le parentesi delle volte a altri righi

L’incisore Volta_engraver risiede nel contesto Score, quindi le parentesi delle ripetizioni appaiono di norma soltanto sul rigo superiore. Questo comportamento può essere modificato aggiungendo l’incisore Volta_engraver al contesto Staff in cui si desidera far apparire le parentesi; si veda anche il frammento “Volta multirigo”.

<<
  \new Staff { \repeat volta 2 { c'1 } \alternative { c' } }
  \new Staff { \repeat volta 2 { c'1 } \alternative { c' } }
  \new Staff \with { \consists "Volta_engraver" } { c'2 g' e' a' }
  \new Staff { \repeat volta 2 { c'1 } \alternative { c' } }
>>

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Centered measure numbers

Scores of large ensemble works often have bar numbers placed beneath the system, centered horizontally on the measure’s extent. This snippet shows how the Measure_counter_engraver may be used to simulate this notational practice. Here, the engraver has been added to a Dynamics context.

This snippet presents a legacy method: starting from LilyPond 2.23.3, \set Score.centerBarNumbers = ##t is enough.

\layout {
  \context {
    \Dynamics
    \consists #Measure_counter_engraver
    \override MeasureCounter.direction = #DOWN
    \override MeasureCounter.font-encoding = #'latin1
    \override MeasureCounter.font-shape = #'italic
    % to control the distance of the Dynamics context from the staff:
    \override VerticalAxisGroup.nonstaff-relatedstaff-spacing.padding = #2
  }
  \context {
    \Score
    \remove "Bar_number_engraver"
  }
}

pattern = \repeat unfold 7 { c'4 d' e' f' }

\new StaffGroup <<
  \new Staff {
    \pattern
  }
  \new Staff {
    \pattern
  }
  \new Dynamics {
    \startMeasureCount
    s1*7
    \stopMeasureCount
  }
>>

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Changing the default bar lines

Default bar lines can be changed when re-defined in a score context.

% http://lsr.di.unimi.it/LSR/Item?id=964
%%=> http://lists.gnu.org/archive/html/lilypond-user/2014-03/msg00126.html
%%=> http://lilypond.1069038.n5.nabble.com/Changing-the-default-end-repeat-bracket-tc169357.html

\layout {
  \context {
    \Score
    %% Changing the defaults from engraver-init.ly
    measureBarType = #"!"
    startRepeatBarType = #"[|:"
    endRepeatBarType = #":|]"
    doubleRepeatBarType = #":|][|:"
  }
}

%% example:
{
  c'1
  \repeat volta 2 { \repeat unfold 2 c' }
  \repeat volta 2 { \repeat unfold 2 c' }
  \alternative {
    { c' }
    {
      %% v2.18 workaround
      \once\override Score.VoltaBracket.shorten-pair = #'(1 . -1)
      c'
    }
  }
  \bar "|."
}

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Tremoli attraverso i righi

Dato che \repeat tremolo si aspetta esattamente due argomenti musicali per i tremoli di accordi, la nota o l’accordo che cambiano rigo in un tremolo che attraversa i righi devono essere posti tra parentesi graffe insieme al comando \change Staff.

\new PianoStaff <<
  \new Staff = "up" \relative c'' {
    \key a \major
    \time 3/8
    s4.
  }
  \new Staff = "down" \relative c'' {
    \key a \major
    \time 3/8
    \voiceOne
    \repeat tremolo 6 {
      <a e'>32
      {
        \change Staff = "up"
        \voiceTwo
        <cis a' dis>32
      }
    }
  }
>>

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Engraving tremolos with floating beams

If a tremolo’s total duration is less than a quarter-note, or exactly a half-note, or between a half-note and a whole-note, it is normally typeset with all beams touching the stems. Certain engraving styles typeset some of these beams as centered floating beams that do not touch the stems. The number of floating beams in this type of tremolo is controlled with the 'gap-count property of the Beam object, and the size of the gaps between beams and stems is set with the 'gap property.

\relative c'' {
  \repeat tremolo 8 { a32 f }
  \override Beam.gap-count = #1
  \repeat tremolo 8 { a32 f }
  \override Beam.gap-count = #2
  \repeat tremolo 8 { a32 f }
  \override Beam.gap-count = #3
  \repeat tremolo 8 { a32 f }

  \override Beam.gap-count = #3
  \override Beam.gap = #1.33
  \repeat tremolo 8 { a32 f }
  \override Beam.gap = #1
  \repeat tremolo 8 { a32 f }
  \override Beam.gap = #0.67
  \repeat tremolo 8 { a32 f }
  \override Beam.gap = #0.33
  \repeat tremolo 8 { a32 f }
}

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Ripetizioni con segni di percentuale isolati

Si possono stampare anche segni di percentuale isolati.

makePercent =
#(define-music-function (note) (ly:music?)
   "Make a percent repeat the same length as NOTE."
   (make-music 'PercentEvent
               'length (ly:music-length note)))

\relative c'' {
  \makePercent s1
}

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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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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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Visibilità del conto della ripetizione con segno percentuale

I contatori della ripetizione con segno percentuale possono essere mostrati a intervalli regolari impostando la proprietà di contesto repeatCountVisibility.

\relative c'' {
  \set countPercentRepeats = ##t
  \set repeatCountVisibility = #(every-nth-repeat-count-visible 5)
  \repeat percent 10 { c1 } \break
  \set repeatCountVisibility = #(every-nth-repeat-count-visible 2)
  \repeat percent 6 { c1 d1 }
}

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Contatore della ripetizione con segno percentuale

Le ripetizioni di misura che hanno più di due ripetizioni possono avere un contatore se si cambia la proprietà opportuna, come mostra questo esempio:

\relative c'' {
  \set countPercentRepeats = ##t
  \repeat percent 4 { c1 }
}

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Positioning segno and coda (with line break)

If you want to place an exiting segno sign and add text like “D.S. al Coda” next to it where usually the staff lines are you can use this snippet. The coda will resume in a new line. There is a variation documented in this snippet, where the coda will remain on the same line.

{
  \relative c'' {
    c4 c c c c c c c c c c c
    \repeat segno 2 {
      c4 c c c c c c c
      \alternative {
        \volta 1 {
          c4 c c c c c c c c c c c
          % If you don't use \break at Coda, use \noBreak here
          % and after \bar "" below.
          \noBreak
          \section % double bar line
          \cadenzaOn % pause bar count
          \stopStaff % remove staff lines
          % Increasing the unfold counter will expand the staff-free space
          \repeat unfold 6 {
            s1
            \bar ""
          }
          % Place JumpScript where the staff would normally be.
          \once \override Score.JumpScript.outside-staff-priority = ##f
          \once \override Score.JumpScript.Y-offset = 0
          \startStaff % resume bar count
          \cadenzaOff % show staff lines again
        }
      }
    }
    \sectionLabel "Coda"
    % Show Coda on a new line
    \break
    \repeat unfold 8 { c4 c c c }
    \fine
  }
}

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Impostare la doppia ripetizione predefinita per le volte

Esistono tre diversi stili di doppie ripetizioni per le volte, che si possono impostare con doubleRepeatBarType.

\relative c'' {
  \repeat volta 2 { c1 }
  \set Score.doubleRepeatBarType = #":..:"
  \repeat volta 2 { c1 }
  \set Score.doubleRepeatBarType = #":|.|:"
  \repeat volta 2 { c1 }
  \set Score.doubleRepeatBarType = #":|.:"
  \repeat volta 2 { c1 }
}

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Accorciare le parentesi delle volte

Per impostazione predefinita, le parentesi delle volte si estendono per tutta l’alternativa, ma si possono accorciare impostando voltaSpannerDuration. Nell’esempio seguente, la parentesi dura una misura, che ha una durata di 3/4.

\relative c'' {
  \time 3/4
  c4 c c
  \set Score.voltaSpannerDuration = #(ly:make-moment 3/4)
  \repeat volta 5 { d4 d d }
  \alternative {
    {
      e4 e e
      f4 f f
    }
    { g4 g g }
  }
}

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Volta sotto gli accordi

Aggiungendo l’incisore Volta_engraver al rigo, è possibile inserire le volte sotto gli accordi.

\score {
  <<
    \chords {
      c1
      c1
    }
    \new Staff \with {
      \consists "Volta_engraver"
    }
    {
      \repeat volta 2 { c'1 }
      \alternative { c' }
    }
  >>
  \layout {
    \context {
      \Score
      \remove "Volta_engraver"
    }
  }
}

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Volta multi staff

By adding the Volta_engraver to the relevant staff, volte can be put over staves other than the topmost one in a score.

voltaMusic = \relative c'' {
  \repeat volta 2 {
    c1
  }
  \alternative {
    d1
    e1
  }
}

<<
  \new StaffGroup <<
    \new Staff \voltaMusic
    \new Staff \voltaMusic
  >>
  \new StaffGroup <<
    \new Staff \with { \consists "Volta_engraver" }
      \voltaMusic
    \new Staff \voltaMusic
  >>
>>

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Volta text markup using repeatCommands

Though volte are best specified using \repeat volta, the context property repeatCommands must be used in cases where the volta text needs more advanced formatting with \markup.

Since repeatCommands takes a list, the simplest method of including markup is to use an identifier for the text and embed it in the command list using the Scheme syntax #(list (list 'volta textIdentifier)). Start- and end-repeat commands can be added as separate list elements:

voltaAdLib = \markup { 1. 2. 3... \text \italic { ad lib. } }

\relative c'' {
  c1
  \set Score.repeatCommands = #(list (list 'volta voltaAdLib) 'start-repeat)
  c4 b d e
  \set Score.repeatCommands = #'((volta #f) (volta "4.") end-repeat)
  f1
  \set Score.repeatCommands = #'((volta #f))
}

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