def __init__(self, symbol='V7'):
from abjad.tools import tonalanalysistools
groups = self._symbol_regex.match(symbol).groups()
accidental, roman_numeral, quality, figured_bass = groups
scale_degree = accidental + roman_numeral
scale_degree = tonalanalysistools.ScaleDegree(scale_degree)
figured_bass_parts = figured_bass.split('/')
naive_figured_bass = [x for x in figured_bass_parts if '-' not in x]
naive_figured_bass = '/'.join(naive_figured_bass)
extent = self._figured_bass_string_to_extent[naive_figured_bass]
extent = tonalanalysistools.ChordExtent(extent)
uppercase = roman_numeral == roman_numeral.upper()
quality = self._get_quality_name(uppercase, quality, extent.number)
quality = tonalanalysistools.ChordQuality(quality)
inversion = self._figured_bass_string_to_inversion[naive_figured_bass]
inversion = tonalanalysistools.ChordInversion(inversion)
suspension = [x for x in figured_bass_parts if '-' in x]
if not suspension:
suspension = None
elif 1 < len(suspension):
message = 'no multiple suspensions yet.'
raise NotImplementedError(message)
else:
suspension = tonalanalysistools.ChordSuspension(suspension[0])
self._root_scale_degree = scale_degree
self._quality = quality
self._extent = extent
self._inversion = inversion
if suspension is not None and suspension.start is None:
suspension = None
self._suspension = suspension
def _initialize_by_symbolic_string(self, symbolic_string):
from abjad.tools import tonalanalysistools
groups = self._symbolic_string_regex.match(symbolic_string).groups()
accidental, roman_numeral, quality, figured_bass = groups
scale_degree = tonalanalysistools.ScaleDegree(accidental +
roman_numeral)
figured_bass_parts = figured_bass.split('/')
naive_figured_bass = [x for x in figured_bass_parts if not '-' in x]
naive_figured_bass = '/'.join(naive_figured_bass)
extent = self._figured_bass_string_to_extent[naive_figured_bass]
extent = tonalanalysistools.ChordExtent(extent)
uppercase = roman_numeral == roman_numeral.upper()
quality = self._get_quality_name(uppercase, quality, extent.number)
quality = tonalanalysistools.ChordQuality(quality)
inversion = self._figured_bass_string_to_inversion[naive_figured_bass]
inversion = tonalanalysistools.ChordInversion(inversion)
suspension = [x for x in figured_bass_parts if '-' in x]
if not suspension:
suspension = tonalanalysistools.ChordSuspension()
elif 1 < len(suspension):
message = 'no multiple suspensions yet.'
raise NotImplementedError(message)
else:
suspension = tonalanalysistools.ChordSuspension(suspension[0])
return scale_degree, quality, extent, inversion, suspension
def _get_quality_symbol(self):
from abjad.tools import tonalanalysistools
if self.extent == tonalanalysistools.ChordExtent(5):
if self.quality == tonalanalysistools.ChordQuality('diminished'):
return 'o'
elif self.quality == tonalanalysistools.ChordQuality('augmented'):
return '+'
else:
return ''
elif self.extent == tonalanalysistools.ChordExtent(7):
if self.quality == tonalanalysistools.ChordQuality('dominant'):
return ''
elif self.quality == tonalanalysistools.ChordQuality('major'):
return 'M'
elif self.quality == \
tonalanalysistools.ChordQuality('diminished'):
return 'o'
elif self.quality == \
tonalanalysistools.ChordQuality('half diminished'):
return '@'
elif self.quality == tonalanalysistools.ChordQuality('augmented'):
return '+'
else:
return ''
else:
raise NotImplementedError
def _initialize_by_scale_degree_quality_extent_and_inversion(self, *args):
from abjad.tools import tonalanalysistools
scale_degree, quality, extent, inversion = args
scale_degree = tonalanalysistools.ScaleDegree(scale_degree)
quality = tonalanalysistools.ChordQuality(quality)
extent = tonalanalysistools.ChordExtent(extent)
inversion = tonalanalysistools.ChordInversion(inversion)
suspension = tonalanalysistools.ChordSuspension()
return scale_degree, quality, extent, inversion, suspension
def from_scale_degree_quality_extent_and_inversion(
scale_degree,
quality,
extent,
inversion,
):
r'''Makes Roman numeral from `scale_degree`, `quality`, `extent` and
`inversion`.
Returns new Roman numeral.
'''
from abjad.tools import tonalanalysistools
scale_degree = tonalanalysistools.ScaleDegree(scale_degree)
quality = tonalanalysistools.ChordQuality(quality)
extent = tonalanalysistools.ChordExtent(extent)
inversion = tonalanalysistools.ChordInversion(inversion)
roman_numeral = RomanNumeral()
roman_numeral._root_scale_degree = scale_degree
roman_numeral._quality = quality
roman_numeral._extent = extent
roman_numeral._inversion = inversion
return roman_numeral