def __init__(self, principal_chord_template, secondary_scale_degree,
secondary_modality):
"""
Constructor.
Args:
principal_chord_template: ChordTemplate for the numerator.
secondary_scale_degree: (int) which scale degree 1 --> 6.
secondary_modality: Modality for the denominator if specified (None if not specified).
"""
ChordTemplate.__init__(self)
self.__principal_chord_template = principal_chord_template
self.__secondary_scale_degree = secondary_scale_degree
self.__secondary_modality = secondary_modality
def __init__(self, diatonic_basis, scale_degree, chord_type, tension_intervals, inversion, inversion_interval=None):
"""
Constructor
Args:
diatonic_basis: DiatonicTone used as root of chord, e.g. C major chord, the C part
scale_degree: int version of roman numeral
chord_type: The chord type ala TertianChordType
tension_intervals: list of Interval's comprising the tensions
inversion: int for which of the chord tones (ordinal) serves as root [origin 1]
inversion_interval: if specified, indicates which interval should be the base.
(both this in interval cannot be non-null.)
"""
ChordTemplate.__init__(self)
self.__diatonic_basis = diatonic_basis # DiatonicTone
self.__scale_degree = scale_degree
self.__chord_type = chord_type
self.__tension_intervals = tension_intervals # list of [number, augmentation] representing intervals
self.__inversion = inversion # which tone of n is the bass
self.__inversion_interval = inversion_interval
self.__base_intervals = []
if chord_type:
self.__base_intervals.extend(TertianChordTemplate.TERTIAN_CHORD_TYPE_MAP[self.chord_type.value])
# Remove duplicate tensions
seen = set()
seen_add = seen.add
deduped_tension_intervals = [tension for tension in self.tension_intervals
if not (tension.semitones() in seen or seen_add(tension.semitones()))]
self.__tension_intervals = deduped_tension_intervals
# Inversion check - only if chord type was given, not for cases like II
if self.chord_type and (self.inversion is not None) and \
self.inversion > len(self.base_intervals) + len(self.tension_intervals):
raise Exception('Illegal inversion {0} for {1}'.format(self.inversion, self.__str__()))
if self.inversion_interval is not None and \
self.inversion_interval not in self.base_intervals and \
self.inversion_interval not in self.tension_intervals:
raise Exception('Illegal inversion_interval {0}'.format(self.inversion_interval))
def __init__(self, diatonic_basis, scale_degree, chord_type,
specified_seconds, inversion):
"""
Constructor
Args:
diatonic_basis: DiatonicTone used as root of chord, e.g. C major chord, the C part
scale_degree: int version of roman numeral
chord_type: The chord type ala SecundalChordType
specified_seconds: list of Interval's secondary notes
inversion: int for which of the chord tones (ordinal) serves as root [origin 1]
"""
ChordTemplate.__init__(self)
self.__diatonic_basis = diatonic_basis # DiatonicTone
self.__scale_degree = scale_degree
self.__chord_type = chord_type
self.__inversion = inversion # which tone of n is the bass
self.__base_intervals = list()
if chord_type:
self.__base_intervals.extend(
SecundalChordTemplate.SECUNDAL_CHORD_TYPE_MAP[
chord_type.value])
self.__specified_seconds = specified_seconds
if specified_seconds:
intervals = list()
intervals.append(Interval(1, IntervalType.Perfect))
for ltr in specified_seconds:
intervals.append(
Interval(
2, IntervalType.Major
if ltr == 'M' else IntervalType.Minor))
self.__base_intervals.extend(intervals)
# Inversion check - only if chord type was given, not for cases like II
if self.chord_type and self.inversion > len(self.base_intervals):
raise Exception('Illegal inversion {0} for {1}'.format(
self.inversion, self.__str__()))
def __init__(self, diatonic_basis, scale_degree, chord_type,
specified_fourths, inversion):
"""
Constructor
Args:
diatonic_basis: DiatonicTone used as root of chord, e.g. C major chord, the C part
scale_degree: int version of roman numeral
chord_type: The chord type ala SecundalChordType
specified_fourths: list of incremental fourth Interval's comprising the chord, e.g. [p, P, P]
usually used in lieu of, or addition to chord_type chord_type
inversion: int for which of the chord tones (ordinal) serves as root [origin 1]
"""
ChordTemplate.__init__(self)
self.__diatonic_basis = diatonic_basis # DiatonicTone
self.__scale_degree = scale_degree
self.__chord_type = chord_type
self.__inversion = inversion # which tone of n is the bass
self.__base_intervals = []
if chord_type:
self.__base_intervals.extend(
QuartalChordTemplate.QUARTAL_CHORD_TYPE_MAP[chord_type.value])
self.__specified_fourths = specified_fourths
if specified_fourths:
intervals = list()
intervals.append(Interval(1, IntervalType.Perfect))
for ltr in specified_fourths:
intervals.append(
Interval(
4, IntervalType.Perfect if ltr == 'P' or ltr == 'p'
else IntervalType.Augmented))
self.__base_intervals.extend(intervals)
# Inversion check - only if chord type was given, not for cases like II
if self.chord_type and self.inversion > len(self.base_intervals):
raise Exception('Illegal inversion {0} for {1}'.format(
self.inversion, self.__str__()))