def __create_chord_on_diatonic_without_type(self, diatonic_tone):
from tonalmodel.tonality import Tonality
from tonalmodel.modality import ModalityType
from harmonicmodel.tertian_chord_template import TertianChordTemplate
diatonic_tonality = Tonality.create(ModalityType.Major, diatonic_tone)
tone_scale = diatonic_tonality.annotation
self.chord_basis = []
base_tone = None
for i in range(0, 3):
tone = tone_scale[(2 * i) % (len(tone_scale) - 1)]
if i == 0:
base_tone = tone
pitch_a = DiatonicPitch(1, diatonic_tone)
b_octave = 2 if base_tone.diatonic_index > tone.diatonic_index else 1
pitch_b = DiatonicPitch(b_octave, tone.diatonic_symbol)
interval = Interval.create_interval(pitch_a, pitch_b)
self.chord_basis.append(interval)
self.__tones.append((tone, interval))
self.__set_inversion()
self.__chord_type = TertianChordTemplate.get_chord_type(
self.chord_basis)
def __create_chord_on_scale_degree(self):
from harmonicmodel.tertian_chord_template import TertianChordTemplate
root_index = self.chord_template.scale_degree - 1
tone_scale = self.diatonic_tonality.annotation
self.chord_basis = []
base_tone = None
for i in range(0, 3):
tone = tone_scale[(root_index + 2 * i) % (len(tone_scale) - 1)]
if i == 0:
base_tone = tone
pitch_a = DiatonicPitch(1, tone_scale[root_index].diatonic_symbol)
b_octave = 2 if base_tone.diatonic_index > tone.diatonic_index else 1
pitch_b = DiatonicPitch(b_octave, tone.diatonic_symbol)
interval = Interval.create_interval(pitch_a, pitch_b)
self.chord_basis.append(interval)
self.__tones.append((tone, interval))
self.__set_inversion()
self.__chord_type = TertianChordTemplate.get_chord_type(
self.chord_basis)