def _is_neighbor_note(note):
from abjad.tools import scoretools
from abjad.tools import tonalanalysistools
if not isinstance(note, scoretools.Note):
message = 'must be note: {!r}.'
message = message.format(note)
raise TypeError(message)
previous_note = note._get_in_my_logical_voice(
-1, prototype=scoretools.Note)
next_note = note._get_in_my_logical_voice(
1, prototype=scoretools.Note)
if previous_note is None:
return False
if next_note is None:
return False
notes = [previous_note, note, next_note]
selection = tonalanalysistools.select(notes)
preceding_interval = note.written_pitch - previous_note.written_pitch
preceding_interval_direction = \
mathtools.sign(preceding_interval.direction_number)
following_interval = next_note.written_pitch - note.written_pitch
following_interval_direction = \
mathtools.sign(following_interval.direction_number)
if selection.are_stepwise_notes():
if preceding_interval_direction != following_interval_direction:
return True
return False
def _is_neighbor_note(note):
from abjad.tools import scoretools
from abjad.tools import tonalanalysistools
if not isinstance(note, scoretools.Note):
message = 'must be note: {!r}.'
message = message.format(note)
raise TypeError(message)
previous_note = note._get_in_my_logical_voice(
-1, component_class=scoretools.Note)
next_note = note._get_in_my_logical_voice(
1, component_class=scoretools.Note)
if previous_note is None:
return False
if next_note is None:
return False
notes = [previous_note, note, next_note]
selection = tonalanalysistools.select(notes)
preceding_interval = note.written_pitch - previous_note.written_pitch
preceding_interval_direction = \
mathtools.sign(preceding_interval.direction_number)
following_interval = next_note.written_pitch - note.written_pitch
following_interval_direction = \
mathtools.sign(following_interval.direction_number)
if selection.are_stepwise_notes():
if preceding_interval_direction != following_interval_direction:
return True
return False
def _is_passing_tone(note):
from abjad.tools import scoretools
from abjad.tools import tonalanalysistools
if not isinstance(note, scoretools.Note):
message = 'must be note: {!r}.'
message = message.format(note)
raise TypeError(message)
previous_note = note._get_in_my_logical_voice(
-1, prototype=scoretools.Note)
next_note = note._get_in_my_logical_voice(
1, prototype=scoretools.Note)
if previous_note is None or next_note is None:
return False
notes = [previous_note, note, next_note]
selection = tonalanalysistools.select(notes)
return selection.are_scalar_notes()
def _is_passing_tone(note):
from abjad.tools import scoretools
from abjad.tools import tonalanalysistools
if not isinstance(note, scoretools.Note):
message = 'must be note: {!r}.'
message = message.format(note)
raise TypeError(message)
previous_note = note._get_in_my_logical_voice(
-1, component_class=scoretools.Note)
next_note = note._get_in_my_logical_voice(
1, component_class=scoretools.Note)
if previous_note is None or next_note is None:
return False
notes = [previous_note, note, next_note]
selection = tonalanalysistools.select(notes)
return selection.are_scalar_notes()
def _analyze_incomplete_tonal_function(expr, key_signature):
from abjad.tools import tonalanalysistools
if isinstance(expr, tonalanalysistools.RootedChordClass):
chord_class = expr
else:
selection = tonalanalysistools.select(expr)
chord_classes = selection.analyze_incomplete_chords()
assert len(chord_classes) == 1
chord_class = chord_classes[0]
root = chord_class.root
scale = tonalanalysistools.Scale(key_signature)
scale_degree = scale.named_pitch_class_to_scale_degree(root)
quality = chord_class.chord_quality.quality_string
extent = chord_class.extent
inversion = chord_class.inversion
return tonalanalysistools.RomanNumeral(
scale_degree,
quality,
extent,
inversion,
)
def _analyze_incomplete_tonal_function(expr, key_signature):
from abjad.tools import tonalanalysistools
if isinstance(expr, tonalanalysistools.RootedChordClass):
chord_class = expr
else:
selection = tonalanalysistools.select(expr)
chord_classes = selection.analyze_incomplete_chords()
assert len(chord_classes) == 1
chord_class = chord_classes[0]
root = chord_class.root
scale = tonalanalysistools.Scale(key_signature)
scale_degree = scale.named_pitch_class_to_scale_degree(root)
quality = chord_class.chord_quality.quality_string
extent = chord_class.extent
inversion = chord_class.inversion
return tonalanalysistools.RomanNumeral(
scale_degree,
quality,
extent,
inversion,
)
