## B.12 All context properties

aDueText (markup)

Text to print at a unisono passage.

alignAboveContext (string)

Where to insert newly created context in vertiical alignment.

alignBassFigureAccidentals (boolean)

If true, then the accidentals are aligned in bass figure context.

alignBelowContext (string)

Where to insert newly created context in vertiical alignment.

associatedVoice (string)

Name of the Voice that has the melody for this Lyrics line.

autoAccidentals (list)

List of different ways to typeset an accidental.

For determining when to print an accidental, several different rules are tried. The rule that gives the highest number of accidentals is used.

Each entry in the list is either a symbol or a procedure.

symbol

The symbol is the name of the context in which the following rules are to be applied. For example, if context is Score then all staves share accidentals, and if context is Staff then all voices in the same staff share accidentals, but staves do not.

procedure

The procedure represents an accidental rule to be applied to the previously specified context.

The procedure takes the following arguments:

context

The current context to which the rule should be applied.

pitch

The pitch of the note to be evaluated.

barnum

The current bar number.

measurepos

The current measure position.

The procedure returns a pair of booleans. The first states whether an extra natural should be added. The second states whether an accidental should be printed. (#t . #f) does not make sense.

autoBeamCheck (procedure)

A procedure taking three arguments, context, dir [start/stop (-1 or 1)], and test [shortest note in the beam]. A non-#f return value starts or stops the auto beam.

autoBeamSettings (list)

Specifies when automatically generated beams should begin and end. See behavior Setting automatic beam behavior for more information.

autoBeaming (boolean)

If set to true then beams are generated automatically.

autoCautionaries (list)

List similar to autoAccidentals, but it controls cautionary accidentals rather than normal ones. Both lists are tried, and the one giving the most accidentals wins. In case of draw, a normal accidental is typeset.

automaticBars (boolean)

If set to false then bar lines will not be printed automatically; they must be explicitly created with a \bar command. Unlike the \cadenzaOn keyword, measures are still counted. Bar line generation will resume according to that count if this property is unset.

barAlways (boolean)

If set to true a bar line is drawn after each note.

barCheckSynchronize (boolean)

If true then reset measurePosition when finding a bar check.

barNumberVisibility (procedure)

A Procedure that takes an integer and returns whether the corresponding bar number should be printed.

bassFigureFormatFunction (procedure)

A procedure that is called to produce the formatting for a BassFigure grob. It takes a list of BassFigureEvents, a context, and the grob to format.

bassStaffProperties (list)

An alist of property settings to apply for the down staff of PianoStaff. Used by \autochange.

beatGrouping (list)

A list of beatgroups, e.g., in 5/8 time '(2 3).

beatLength (moment)

The length of one beat in this time signature.

chordChanges (boolean)

Only show changes in chords scheme?

chordNameExceptions (list)

An alist of chord exceptions. Contains (chord . markup) entries.

chordNameExceptionsFull (list)

An alist of full chord exceptions. Contains (chord . markup) entries.

chordNameExceptionsPartial (list)

An alist of partial chord exceptions. Contains (chord . (prefix-markup suffix-markup)) entries.

chordNameFunction (procedure)

The function that converts lists of pitches to chord names.

chordNameSeparator (markup)

The markup object used to separate parts of a chord name.

chordNoteNamer (procedure)

A function that converts from a pitch object to a text markup. Used for single pitches.

chordPrefixSpacer (number)

The space added between the root symbol and the prefix of a chord name.

chordRootNamer (procedure)

A function that converts from a pitch object to a text markup. Used for chords.

clefGlyph (string)

Name of the symbol within the music font.

clefOctavation (integer)

Add this much extra octavation. Values of 7 and -7 are common.

clefPosition (number)

Where should the center of the clef symbol go, measured in half staff spaces from the center of the staff.

completionBusy (boolean)

Whether a completion-note head is playing.

connectArpeggios (boolean)

If set, connect arpeggios across piano staff.

countPercentRepeats (boolean)

If set, produce counters for percent repeats.

createKeyOnClefChange (boolean)

Print a key signature whenever the clef is changed.

createSpacing (boolean)

Create StaffSpacing objects? Should be set for staves.

crescendoSpanner (symbol)

The type of spanner to be used for crescendi. Available values are ‘hairpin’ and ‘text’. If unset, a hairpin crescendo is used.

crescendoText (markup)

The text to print at start of non-hairpin crescendo, i.e., ‘cresc.’.

currentBarNumber (integer)

Contains the current barnumber. This property is incremented at every bar line.

decrescendoSpanner (symbol)

The type of spanner to be used for decrescendi. Available values are ‘hairpin’ and ‘text’. If unset, a hairpin decrescendo is used.

decrescendoText (markup)

The text to print at start of non-hairpin decrescendo, i.e., ‘dim.’.

defaultBarType (string)

Set the default type of bar line. See whichBar for information on available bar types.

This variable is read by Timing_translator at Score level.

doubleRepeatType (string)

Set the default bar line for double repeats.

doubleSlurs (boolean)

If set, two slurs are created for every slurred note, one above and one below the chord.

drumPitchTable (hash table)

A table mapping percussion instruments (symbols) to pitches.

drumStyleTable (hash table)

A hash table which maps drums to layout settings. Predefined values: ‘drums-style’, ‘timbales-style’, ‘congas-style’, ‘bongos-style’, and ‘percussion-style’.

The layout style is a hash table, containing the drum-pitches (e.g., the symbol ‘hihat’) as keys, and a list (notehead-style script vertical-position) as values.

explicitClefVisibility (vector)

break-visibility’ function for clef changes.

explicitKeySignatureVisibility (vector)

break-visibility’ function for explicit key changes. ‘\override’ of the break-visibility property will set the visibility for normal (i.e., at the start of the line) key signatures.

extendersOverRests (boolean)

Whether to continue extenders as they cross a rest.

extraNatural (boolean)

Whether to typeset an extra natural sign before accidentals changing from a non-natural to another non-natural.

figuredBassAlterationDirection (direction)

Where to put alterations relative to the main figure.

figuredBassCenterContinuations (boolean)

Whether to vertically center pairs of extender lines. This does not work with three or more lines.

figuredBassFormatter (procedure)

A routine generating a markup for a bass figure.

figuredBassPlusDirection (direction)

Where to put plus signs relative to the main figure.

fingeringOrientations (list)

A list of symbols, containing ‘left’, ‘right’, ‘up’ and/or ‘down’. This list determines where fingerings are put relative to the chord being fingered.

firstClef (boolean)

If true, create a new clef when starting a staff.

followVoice (boolean)

If set, note heads are tracked across staff switches by a thin line.

fontSize (number)

The relative size of all grobs in a context.

forbidBreak (boolean)

If set to ##t, prevent a line break at this point.

forceClef (boolean)

Show clef symbol, even if it has not changed. Only active for the first clef after the property is set, not for the full staff.

gridInterval (moment)

Interval for which to generate GridPoints.

harmonicAccidentals (boolean)

If set, harmonic notes in chords get accidentals.

harmonicDots (boolean)

If set, harmonic notes in dotted chords get dots.

highStringOne (boolean)

Whether the first string is the string with highest pitch on the instrument. This used by the automatic string selector for tablature notation.

ignoreBarChecks (boolean)

Ignore bar checks.

ignoreFiguredBassRest (boolean)

Don’t swallow rest events.

ignoreMelismata (boolean)

Ignore melismata for this Lyrics line.

implicitBassFigures (list)

A list of bass figures that are not printed as numbers, but only as extender lines.

implicitTimeSignatureVisibility (vector)

break visibility for the default time signature.

instrumentCueName (markup)

The name to print if another instrument is to be taken.

instrumentEqualizer (procedure)

A function taking a string (instrument name), and returning a (min . max) pair of numbers for the loudness range of the instrument.

instrumentName (markup)

The name to print left of a staff. The instrument property labels the staff in the first system, and the instr property labels following lines.

instrumentTransposition (pitch)

Define the transposition of the instrument. Its value is the pitch that sounds like middle C. This is used to transpose the MIDI output, and \quotes.

internalBarNumber (integer)

Contains the current barnumber. This property is used for internal timekeeping, among others by the Accidental_engraver.

keepAliveInterfaces (list)

A list of symbols, signifying grob interfaces that are worth keeping a staff with remove-empty set around for.

keyAlterationOrder (list)

An alist that defines in what order alterations should be printed. The format is (step . alter), where step is a number from 0 to 6 and alter from -2 (sharp) to 2 (flat).

keySignature (list)

The current key signature. This is an alist containing (step . alter) or ((octave . step) . alter), where step is a number in the range 0 to 6 and alter a fraction, denoting alteration. For alterations, use symbols, e.g. keySignature = #((6 . ,FLAT)).

lyricMelismaAlignment (direction)

Alignment to use for a melisma syllable.

majorSevenSymbol (markup)

How should the major 7th be formatted in a chord name?

markFormatter (procedure)

A procedure taking as arguments the context and the rehearsal mark. It should return the formatted mark as a markup object.

maximumFretStretch (number)

Don’t allocate frets further than this from specified frets.

measureLength (moment)

Length of one measure in the current time signature.

measurePosition (moment)

How much of the current measure have we had. This can be set manually to create incomplete measures.

melismaBusyProperties (list)

A list of properties (symbols) to determine whether a melisma is playing. Setting this property will influence how lyrics are aligned to notes. For example, if set to #'(melismaBusy beamMelismaBusy), only manual melismata and manual beams are considered. Possible values include melismaBusy, slurMelismaBusy, tieMelismaBusy, and beamMelismaBusy.

metronomeMarkFormatter (procedure)

How to produce a metronome markup. Called with four arguments: text, duration, count and context.

middleCClefPosition (number)

The position of the middle C, as determined only by the clef. This can be calculated by looking at clefPosition and clefGlyph.

middleCOffset (number)

The offset of middle C from the position given by middleCClefPosition This is used for ottava brackets.

middleCPosition (number)

The place of the middle C, measured in half staff-spaces. Usually determined by looking at middleCClefPosition and middleCOffset.

midiInstrument (string)

Name of the MIDI instrument to use.

midiMaximumVolume (number)

Analogous to midiMinimumVolume.

midiMinimumVolume (number)

Set the minimum loudness for MIDI. Ranges from 0 to 1.

minimumFret (number)

The tablature auto string-selecting mechanism selects the highest string with a fret at least minimumFret.

minimumPageTurnLength (moment)

Minimum length of a rest for a page turn to be allowed.

minimumRepeatLengthForPageTurn (moment)

Minimum length of a repeated section for a page turn to be allowed within that section.

noteToFretFunction (procedure)

How to produce a fret diagram. Parameters: A list of note events and a list of tabstring events.

ottavation (markup)

If set, the text for an ottava spanner. Changing this creates a new text spanner.

output (unknown)

The output produced by a score-level translator during music interpretation.

pedalSostenutoStrings (list)

See pedalSustainStrings.

pedalSostenutoStyle (symbol)

See pedalSustainStyle.

pedalSustainStrings (list)

A list of strings to print for sustain-pedal. Format is (up updown down), where each of the three is the string to print when this is done with the pedal.

pedalSustainStyle (symbol)

A symbol that indicates how to print sustain pedals: text, bracket or mixed (both).

pedalUnaCordaStrings (list)

See pedalSustainStrings.

pedalUnaCordaStyle (symbol)

See pedalSustainStyle.

predefinedDiagramTable (hash table)

The hash table of predefined fret diagrams to use in FretBoards.

printKeyCancellation (boolean)

Print restoration alterations before a key signature change.

printOctaveNames (boolean)

Print octave marks for the NoteNames context.

printPartCombineTexts (boolean)

Set ‘Solo’ and ‘A due’ texts in the part combiner?

proportionalNotationDuration (moment)

Global override for shortest-playing duration. This is used for switching on proportional notation.

recordEventSequence (procedure)

When Recording_group_engraver is in this context, then upon termination of the context, this function is called with current context and a list of music objects. The list of contains entries with start times, music objects and whether they are processed in this context.

rehearsalMark (integer)

The last rehearsal mark printed.

repeatCommands (list)

This property is a list of commands of the form (list 'volta x), where x is a string or #f. 'end-repeat is also accepted as a command.

repeatCountVisibility (procedure)

A procedure taking as arguments an integer and context, returning whether the corresponding percent repeat number should be printed when countPercentRepeats is set.

restNumberThreshold (number)

If a multimeasure rest has more measures than this, a number is printed.

shapeNoteStyles (vector)

Vector of symbols, listing style for each note head relative to the tonic (qv.) of the scale.

shortInstrumentName (markup)

See instrument.

shortVocalName (markup)

Name of a vocal line, short version.

skipBars (boolean)

If set to true, then skip the empty bars that are produced by multimeasure notes and rests. These bars will not appear on the printed output. If not set (the default), multimeasure notes and rests expand into their full length, printing the appropriate number of empty bars so that synchronization with other voices is preserved.

{
r1 r1*3 R1*3
\set Score.skipBars= ##t
r1*3 R1*3
}

skipTypesetting (boolean)

If true, no typesetting is done, speeding up the interpretation phase. Useful for debugging large scores.

soloIIText (markup)

The text for the start of a solo for voice ‘two’ when part-combining.

soloText (markup)

The text for the start of a solo when part-combining.

squashedPosition (integer)

Vertical position of squashing for Pitch_squash_engraver.

staffLineLayoutFunction (procedure)

Layout of staff lines, traditional, or semitone.

stanza (markup)

Stanza ‘number’ to print before the start of a verse. Use in Lyrics context.

stemLeftBeamCount (integer)

Specify the number of beams to draw on the left side of the next note. Overrides automatic beaming. The value is only used once, and then it is erased.

stemRightBeamCount (integer)

See stemLeftBeamCount.

stringNumberOrientations (list)

See fingeringOrientations.

stringOneTopmost (boolean)

Whether the first string is printed on the top line of the tablature.

stringTunings (list)

The tablature strings tuning. It is a list of the pitch (in semitones) of each string (starting with the lower one).

strokeFingerOrientations (list)

See fingeringOrientations.

subdivideBeams (boolean)

If set, multiple beams will be subdivided at beat positions by only drawing one beam over the beat.

suggestAccidentals (boolean)

If set, accidentals are typeset as cautionary suggestions over the note.

systemStartDelimiter (symbol)

Which grob to make for the start of the system/staff? Set to SystemStartBrace, SystemStartBracket or SystemStartBar.

systemStartDelimiterHierarchy (pair)

A nested list, indicating the nesting of a start delimiters.

tablatureFormat (procedure)

A function formatting a tablature note head. Called with three arguments: string number, context and event. It returns the text as a string.

tempoHideNote (boolean)

Hide the note=count in tempo marks.

tempoText (markup)

Text for tempo marks.

tempoUnitCount (number)

Count for specifying tempo.

tempoUnitDuration (duration)

Unit for specifying tempo.

tempoWholesPerMinute (moment)

The tempo in whole notes per minute.

tieWaitForNote (boolean)

If true, tied notes do not have to follow each other directly. This can be used for writing out arpeggios.

timeSignatureFraction (pair of numbers)

A pair of numbers, signifying the time signature. For example, #'(4 . 4) is a 4/4 time signature.

timing (boolean)

Keep administration of measure length, position, bar number, etc.? Switch off for cadenzas.

tonic (pitch)

The tonic of the current scale.

trebleStaffProperties (list)

An alist of property settings to apply for the up staff of PianoStaff. Used by \autochange.

tremoloFlags (integer)

The number of tremolo flags to add if no number is specified.

tupletFullLength (boolean)

If set, the tuplet is printed up to the start of the next note.

tupletFullLengthNote (boolean)

If set, end at the next note, otherwise end on the matter (time signatures, etc.) before the note.

tupletSpannerDuration (moment)

Normally, a tuplet bracket is as wide as the \times expression that gave rise to it. By setting this property, you can make brackets last shorter.

{
\set tupletSpannerDuration = #(ly:make-moment 1 4)
\times 2/3 { c8 c c c c c }
}

useBassFigureExtenders (boolean)

Whether to use extender lines for repeated bass figures.

verticallySpacedContexts (list)

List of symbols, containing context names whose vertical axis groups should be taken into account for vertical spacing of systems.

vocalName (markup)

Name of a vocal line.

voltaSpannerDuration (moment)

This specifies the maximum duration to use for the brackets printed for \alternative. This can be used to shrink the length of brackets in the situation where one alternative is very large.

whichBar (string)

This property is read to determine what type of bar line to create.

Example:

\set Staff.whichBar = "|:"
`

This will create a start-repeat bar in this staff only. Valid values are described in bar-line-interface.

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