def _analyze_incomplete_chord(expr):
from abjad.tools import tonalanalysistools
pitches = pitchtools.PitchSegment.from_selection(expr)
npcset = pitchtools.PitchClassSet(
pitches, item_class=pitchtools.NamedPitchClass)
dicv = pitchtools.IntervalClassVector(
items=npcset,
item_class=pitchtools.NamedInversionEquivalentIntervalClass,
)
# TODO: eliminate code duplication #
if dicv == TonalAnalysisAgent._make_dicv('c', 'ef'):
model_npcs = ['c', 'ef']
quality, extent = 'minor', 'triad'
elif dicv == TonalAnalysisAgent._make_dicv('c', 'e'):
model_npcs = ['c', 'e']
quality, extent = 'major', 'triad'
elif dicv == TonalAnalysisAgent._make_dicv('c', 'ef', 'bff'):
model_npcs = ['c', 'ef', 'bff']
quality, extent = 'diminished', 'seventh'
elif dicv == TonalAnalysisAgent._make_dicv('c', 'ef', 'bf'):
model_npcs = ['c', 'ef', 'bf']
quality, extent = 'minor', 'seventh'
elif dicv == TonalAnalysisAgent._make_dicv('c', 'e', 'bf'):
model_npcs = ['c', 'e', 'bf']
quality, extent = 'dominant', 'seventh'
elif dicv == TonalAnalysisAgent._make_dicv('c', 'e', 'b'):
model_npcs = ['c', 'e', 'b']
quality, extent = 'major', 'seventh'
else:
message = 'can not identify incomplete tertian chord.'
raise ValueError(message)
bass = min(pitches).named_pitch_class
try:
npcseg = npcset.order_by(
pitchtools.PitchClassSegment(
model_npcs,
item_class=pitchtools.NamedPitchClass,
))
except ValueError:
message = 'can not identify incomplete tertian chord.'
raise ValueError(message)
inversion = npcseg.index(bass)
root = npcseg[0]
return tonalanalysistools.RootedChordClass(
root,
quality,
extent,
inversion,
)
def _make_dicv(*named_pitch_classes):
pitch_set = pitchtools.PitchSet(named_pitch_classes)
return pitchtools.IntervalClassVector(
items=pitch_set,
item_class=pitchtools.NamedInversionEquivalentIntervalClass,
)
def label_vertical_moments_in_expr_with_interval_class_vectors(
expr, markup_direction=Down):
r'''Labels interval-class vector of every vertical moment in `expr`:
::
>>> score = Score([])
>>> staff = Staff("c'8 d'8 e'8 f'8")
>>> score.append(staff)
>>> staff = Staff(r"""\clef "alto" g4 f4""")
>>> score.append(staff)
>>> staff = Staff(r"""\clef "bass" c,2""")
>>> score.append(staff)
::
>>> labeltools.label_vertical_moments_in_expr_with_interval_class_vectors(score)
.. doctest::
>>> print(format(score))
\new Score <<
\new Staff {
c'8
d'8
_ \markup {
\tiny
0010020
}
e'8
f'8
_ \markup {
\tiny
1000020
}
}
\new Staff {
\clef "alto"
g4
f4
_ \markup {
\tiny
0100110
}
}
\new Staff {
\clef "bass"
c,2
_ \markup {
\tiny
1000020
}
}
>>
::
>>> show(score) # doctest: +SKIP
Returns none.
'''
for vertical_moment in iterate(expr).by_vertical_moment():
leaves = vertical_moment.leaves
pitches = pitchtools.PitchSegment.from_selection(leaves)
if not pitches:
continue
interval_class_vector = pitchtools.IntervalClassVector(
pitches,
item_class=pitchtools.NumberedInversionEquivalentIntervalClass,
)
formatted = _format_interval_class_vector(interval_class_vector)
markup = markuptools.Markup(formatted, markup_direction)
attach(markup, vertical_moment.start_leaves[-1])