def __init__(
self,
quality_string='major',
extent='triad',
inversion='root',
):
if extent in ('triad', 5):
intervals = self._initialize_triad(quality_string)
elif extent in ('seventh', 7):
intervals = self._initialize_seventh(quality_string)
elif extent in ('ninth', 9):
intervals = self._initialize_ninth(quality_string)
elif extent in ('augmented sixth', 6):
intervals = self._initialize_augmented_sixth(quality_string)
else:
message = 'unknown chord quality arguments.'
raise ValueError(message)
intervals, rotation = self._invert_chord_quality(
intervals, inversion)
IntervalSegment.__init__(
self,
items=intervals,
item_class=pitchtools.NamedInterval,
)
self._quality_string = quality_string
self._rotation = rotation
def __init__(self, quality_string, extent='triad', inversion='root'):
if extent in ('triad', 5):
intervals = self._init_triad(quality_string)
elif extent in ('seventh', 7):
intervals = self._init_seventh(quality_string)
elif extent in ('ninth', 9):
intervals = self._init_ninth(quality_string)
elif extent in ('augmented sixth', 6):
intervals = self._init_augmented_sixth(quality_string)
else:
raise ValueError('unknown chord quality indicator arguments.')
intervals, rotation = self._invert_quality_indicator(
intervals, inversion)
IntervalSegment.__init__(
self,
tokens=intervals,
item_class=pitchtools.NamedInterval,
)
self._quality_string = quality_string
self._rotation = rotation
def test_pitchtools_IntervalSegment_spread_01():
mcis = IntervalSegment([1, 2, -3, 1, -2, 1])
assert mcis.spread == NumberedInterval(4)