def note_to_midi(note: Note) -> int:
"""Returns the midi value corresponding to the given `Note`."""
c0_code = 12
name, octave = note
name, shift = split_to_base_and_shift(name, name_before_accidental=True)
for candidate, offset in zip(MAJOR_FROM_C, MAJOR_SCALE_OFFSETS.values()):
if name == candidate:
return c0_code + offset + shift + 12 * octave
raise InvalidNote(name)
def _chord_options_triad_with_lower_note(lower_note, upper_triad, _rec):
bass_degree = semitone_to_degree_options(12 - lower_note)[0]
upper_triad_shifted = [semitone - lower_note for semitone in upper_triad]
options = [
"{}/{}".format(option, bass_degree) for option in
semitones_to_chord_name_options(set(upper_triad_shifted), _rec - 1)
]
base_degree, _ = split_to_base_and_shift(bass_degree,
name_before_accidental=False)
return [
option for option in options if bass_degree not in option
or "(no{})".format(base_degree) not in option
]
def _name_options_triad_with_lower_note(
lower_note: int, upper_triad: Iterable[int], _rec: int
) -> List[str]:
"""
Returns possible names for a triad with a lower note (a bass note)
"""
bass_degree = semitone_to_degree_options(12 - lower_note)[0]
upper_triad_shifted = [semitone - lower_note for semitone in upper_triad]
options = [
f"{option}/{bass_degree}"
for option in semitones_to_name_options(set(upper_triad_shifted), _rec - 1)
]
base_degree, _ = split_to_base_and_shift(bass_degree, name_before_accidental=False)
return [
option
for option in options
if not (bass_degree in option and f"(no{base_degree})" in option)
]
def test_split_to_base_and_shift_after(item, base, shift):
assert split_to_base_and_shift(item,
name_before_accidental=True) == (base,
shift)
def test_split_to_base_and_shift_before(item, base, shift):
assert split_to_base_and_shift(item,
name_before_accidental=False) == (base,
shift)
