music21.figuredBass.rules¶
Rules¶
-
class
music21.figuredBass.rules.
Rules
¶
Rules
instance variables
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Rules.
applyConsecutivePossibRulesToResolution
¶ False by default. If True, consecutive possibility rules are applied between (specialPossib, resPossib) pairs.
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Rules.
applySinglePossibRulesToResolution
¶ False by default. If True, single possibility rules are applied to resolution possibilities.
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Rules.
doubledRootInDim7
¶ False by default. If True, Diminished seventh resolutions to the tonic will contain a doubled root, as opposed to a doubled third. Rule is ignored (determined in context) if
segmentChord
is in first inversion.
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Rules.
forbidHiddenFifths
¶ True by default. If True,
hiddenFifth()
is applied to all (possibA, possibB) pairs, and all those pairs for which the method returns False are retained.
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Rules.
forbidHiddenOctaves
¶ True by default. If True,
hiddenOctave()
is applied to all (possibA, possibB) pairs, and all those pairs for which the method returns False are retained.
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Rules.
forbidIncompletePossibilities
¶ True by default. If True,
isIncomplete()
is applied to all possibA, and all those possibilities for which the method returns False are retained.
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Rules.
forbidParallelFifths
¶ True by default. If True,
parallelFifths()
is applied to all (possibA, possibB) pairs, and all those pairs for which the method returns False are retained.
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Rules.
forbidParallelOctaves
¶ True by default. If True,
parallelOctaves()
is applied to all (possibA, possibB) pairs, and all those pairs for which the method returns False are retained.
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Rules.
forbidVoiceCrossing
¶ True by default. If True,
voiceCrossing()
is applied to all possibA, and all those possibilities for which the method returns False are retained.
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Rules.
forbidVoiceOverlap
¶ True by default. If True,
voiceOverlap()
is applied to all (possibA, possibB) pairs, and all those pairs for which the method returns False are retained.
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Rules.
partMovementLimits
¶ [] (empty list) by default. Contains (partNumber, maxSeparation) pairs provided as arguments to
partMovementsWithinLimits()
. Method is applied to all (possibA, possibB) pairs, and all those pairs for which the method returns True are retained.
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Rules.
resolveAugmentedSixthProperly
¶ True by default. If True, Segments whose
segmentChord
spells out an augmented sixth chord are resolved properly by usingresolveAugmentedSixthSegment()
.
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Rules.
resolveDiminishedSeventhProperly
¶ True by default. If True, Segments whose
segmentChord
spells out a fully-diminished seventh chord are resolved properly by usingresolveDiminishedSeventhSegment()
.
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Rules.
resolveDominantSeventhProperly
¶ True by default. If True, Segments whose
segmentChord
spells out a dominant seventh chord are resolved properly by usingresolveDominantSeventhSegment()
.
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Rules.
restrictDoublingsInItalianA6Resolution
¶ True by default. If True, then doublings in the It+6 chord are limited to the tonic, or fifth. Setting this to False allows doubling of the root or third, most likely through parallel unisons if
forbidParallelOctaves
is set to True.
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Rules.
upperPartsMaxSemitoneSeparation
¶ 12 by default. A number, in semitones, representing the maxSemitoneSeparation argument provided to
upperPartsWithinLimit()
. Method is applied to all possibA, and all those possibilities for which the method returns True are retained.