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2.2.59 Key_engraver
Engrave a key signature.
Music types accepted:
Properties (read)
createKeyOnClefChange(boolean)Print a key signature whenever the clef is changed.
explicitKeySignatureVisibility(vector)‘break-visibility’ function for explicit key changes. ‘\override’ of the
break-visibilityproperty will set the visibility for normal (i.e., at the start of the line) key signatures.extraNatural(boolean)Whether to typeset an extra natural sign before accidentals that reduce the effect of a previous alteration.
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).keyAlterations(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.keyAlterations = #`((6 . ,FLAT)).lastKeyAlterations(list)Last key signature before a key signature change.
middleCClefPosition(number)The position of the middle C, as determined only by the clef. This can be calculated by looking at
clefPositionandclefGlyph.printKeyCancellation(boolean)Print restoration alterations before a key signature change.
Properties (write)
keyAlterations(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.keyAlterations = #`((6 . ,FLAT)).lastKeyAlterations(list)Last key signature before a key signature change.
tonic(pitch)The tonic of the current scale.
This engraver creates the following layout object(s):
KeyCancellation and KeySignature.
Key_engraver is part of the following context(s): GregorianTranscriptionStaff, KievanStaff, MensuralStaff, PetrucciStaff, Staff and VaticanaStaff.
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