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2.1.9 Dynamics

Holds a single line of dynamics centered between the staves surrounding this context.

This context also accepts commands for the following context(s): Staff and Voice.

This context creates the following layout object(s): BarLine, DynamicLineSpanner, DynamicText, DynamicTextSpanner, Hairpin, PianoPedalBracket, Script, SostenutoPedal, SustainPedal, TextScript, TextSpanner, UnaCordaPedal and VerticalAxisGroup.

This context sets the following properties:

• Set context property pedalSustainStrings to:

  '("Ped." "*Ped." "*")
  

• Set context property pedalUnaCordaStrings to:

  '("una corda" "" "tre corde")
  

• Set grob property font-shape in TextScript to 'italic.
• Set grob property nonstaff-relatedstaff-spacing in VerticalAxisGroup to :

  '((basic-distance . 5) (padding . 0.5))
  

• Set grob property outside-staff-priority in DynamicLineSpanner to #f.
• Set grob property outside-staff-priority in DynamicText to #f.
• Set grob property outside-staff-priority in Hairpin to #f.
• Set grob property staff-affinity in VerticalAxisGroup to 0.
• Set grob property Y-offset in DynamicLineSpanner to 0.

This is a ‘Bottom’ context; no contexts will be created implicitly from it.

This context cannot contain other contexts.

This context is built from the following engraver(s):

Axis_group_engraver

Group all objects created in this context in a VerticalAxisGroup spanner.

Properties (read)

currentCommandColumn (graphical (layout) object)

Grob that is X-parent to all current breakable items (clef, key signature, etc.).

hasAxisGroup (boolean)

True if the current context is contained in an axis group.

keepAliveInterfaces (list)

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

Properties (write)

hasAxisGroup (boolean)

True if the current context is contained in an axis group.

This engraver creates the following layout object(s): VerticalAxisGroup.

Bar_engraver

Create bar lines for various commands, including \\bar.

If forbidBreakBetweenBarLines is true, allow line breaks at bar lines only.

Music types accepted: ad-hoc-jump-event, caesura-event, coda-mark-event, dal-segno-event, fine-event, section-event and segno-mark-event

Properties (read)

caesuraType (list)

An alist

((bar-line . bar-type)
 (breath . breath-type)
 (scripts . script-type…)
 (underlying-bar-line . bar-type))

specifying which breath mark, bar line, and scripts to create at \caesura. All entries are optional.

bar-line has higher priority than a measure bar line and underlying-bar-line has lower priority than a measure bar line.

caesuraTypeTransform (procedure)

An engraver callback taking three arguments and returning an alist of the same kind as caesuraType.

The first argument is the context.

The second argument is the value of caesuraType with an additional entry (articulations . symbol-list) identifying the articulations attached to the caesura in the music. If the transform function returns this second argument unmodified, it is as if no transform function were set; the function is free to return a different value. The transform function can remove articulations, but any added articulations are ignored.

The third argument is a symbol-list identifying certain things the engraver has observed. bar-line indicates that the engraver has observed a BarLine at the current moment.

doubleRepeatBarType (string)

Bar line to insert where the end of one \repeat volta coincides with the start of another. The default is ‘:..:’.

doubleRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with the end of one \repeat volta and the beginning of another. The default is ‘:|.S.|:’.

endRepeatBarType (string)

Bar line to insert at the end of a \repeat volta. The default is ‘:|.’.

endRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with the end of a \repeat volta. The default is ‘:|.S’.

fineBarType (string)

Bar line to insert at \fine. Where there is also a repeat bar line, the repeat bar line takes precedence and this value is appended to it as an annotation. The default is ‘|.’.

fineSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with \fine. The default is ‘|.S’.

fineStartRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with \fine and the start of a \repeat volta. The default is ‘|.S.|:’.

forbidBreakBetweenBarLines (boolean)

If set to #t, Bar_engraver forbids line breaks where there is no bar line.

measureBarType (string)

Bar line to insert at a measure boundary.

printInitialRepeatBar (boolean)

Use a special bar line at the start of a volta repeat even at the beginning of the piece.

printTrivialVoltaRepeats (boolean)

Notate volta-style repeats even when the repeat count is 1.

repeatCommands (list)

A list of commands related to volta-style repeats. In general, each element is a list, '(command args…), but a command with no arguments may be abbreviated to a symbol; e.g., '((start-repeat)) may be given as '(start-repeat).

end-repeat return-count

End a repeated section. return-count is the number of times to go back from this point to the beginning of the section.

start-repeat repeat-count

Start a repeated section. repeat-count is the number of times to perform this section.

volta text

If text is markup, start a volta bracket with that label; if text is #f, end a volta bracket.

sectionBarType (string)

Bar line to insert at \section. Where there is also a repeat bar line, the repeat bar line takes precedence and this value is appended to it as an annotation. The default is ‘||’.

segnoBarType (string)

Bar line to insert at an in-staff segno. The default is ‘S’.

segnoStyle (symbol)

A symbol that indicates how to print a segno: bar-line or mark.

startRepeatBarType (string)

Bar line to insert at the start of a \repeat volta. The default is ‘.|:’.

startRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with the start of a \repeat volta. The default is ‘S.|:’.

underlyingRepeatBarType (string)

Bar line to insert at points of repetition or departure where no bar line would normally appear, for example at the end of a system broken in mid measure where the next system begins with a segno. Where there is also a repeat bar line, the repeat bar line takes precedence and this value is appended to it as an annotation. The default is ‘||’.

whichBar (string)

The current bar line type, or '() if there is no bar line. Setting this explicitly in user code is deprecated. Use \bar or related commands to set it.

Properties (write)

currentBarLine (graphical (layout) object)

Set to the BarLine that Bar_engraver has created in the current timestep.

forbidBreak (boolean)

If set to #t, prevent a line break at this point, except if explicitly requested by the user.

This engraver creates the following layout object(s): BarLine.

Dynamic_align_engraver

Align hairpins and dynamic texts on a horizontal line.

Properties (read)

currentMusicalColumn (graphical (layout) object)

Grob that is X-parent to all non-breakable items (note heads, lyrics, etc.).

This engraver creates the following layout object(s): DynamicLineSpanner.

Dynamic_engraver

Create hairpins, dynamic texts and dynamic text spanners.

Music types accepted: absolute-dynamic-event, break-dynamic-span-event and span-dynamic-event

Properties (read)

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.’.

currentMusicalColumn (graphical (layout) object)

Grob that is X-parent to all non-breakable items (note heads, lyrics, etc.).

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.’.

This engraver creates the following layout object(s): DynamicText, DynamicTextSpanner and Hairpin.

Font_size_engraver

Put fontSize into font-size grob property.

Properties (read)

fontSize (number)

The relative size of all grobs in a context.

Output_property_engraver

Apply a procedure to any grob acknowledged.

Music types accepted: apply-output-event

Piano_pedal_engraver

Engrave piano pedal symbols and brackets.

Music types accepted: sostenuto-event, sustain-event and una-corda-event

Properties (read)

currentCommandColumn (graphical (layout) object)

Grob that is X-parent to all current breakable items (clef, key signature, etc.).

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.

This engraver creates the following layout object(s): PianoPedalBracket, SostenutoPedal, SustainPedal and UnaCordaPedal.

Script_engraver

Handle note scripted articulations.

Music types accepted: articulation-event

Properties (read)

scriptDefinitions (list)

The description of scripts. This is used by the Script_engraver for typesetting note-superscripts and subscripts. See scm/script.scm for more information.

This engraver creates the following layout object(s): Script.

Text_engraver

Create text scripts.

Music types accepted: text-script-event

This engraver creates the following layout object(s): TextScript.

Text_spanner_engraver

Create text spanner from an event.

Music types accepted: text-span-event

Properties (read)

currentMusicalColumn (graphical (layout) object)

Grob that is X-parent to all non-breakable items (note heads, lyrics, etc.).

This engraver creates the following layout object(s): TextSpanner.